./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product45.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product45.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI --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 ba9a436826b937f0c5d07c40f29a0f312221efc7ce174fd7c7535766b753ea6d --- 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-5e519f3 [2022-11-03 02:53:20,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:53:20,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:53:20,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:53:20,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:53:20,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:53:20,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:53:20,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:53:20,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:53:20,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:53:20,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:53:20,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:53:20,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:53:20,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:53:20,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:53:20,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:53:20,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:53:20,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:53:20,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:53:20,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:53:20,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:53:20,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:53:20,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:53:20,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:53:20,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:53:20,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:53:20,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:53:20,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:53:20,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:53:20,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:53:20,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:53:20,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:53:20,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:53:20,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:53:20,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:53:20,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:53:20,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:53:20,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:53:20,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:53:20,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:53:20,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:53:20,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:53:20,256 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:53:20,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:53:20,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:53:20,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:53:20,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:53:20,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:53:20,258 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:53:20,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:53:20,259 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:53:20,259 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:53:20,260 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:53:20,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:53:20,260 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:53:20,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:53:20,261 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:53:20,261 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:53:20,261 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:53:20,261 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:53:20,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:53:20,262 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:53:20,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:53:20,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:53:20,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:53:20,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:53:20,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:53:20,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:53:20,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:53:20,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:53:20,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:53:20,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:53:20,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:53:20,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:53:20,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:20,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:53:20,272 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:53:20,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:53:20,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:53:20,273 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:53:20,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:53:20,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:53:20,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:53:20,274 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_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba9a436826b937f0c5d07c40f29a0f312221efc7ce174fd7c7535766b753ea6d [2022-11-03 02:53:20,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:53:20,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:53:20,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:53:20,617 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:53:20,618 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:53:20,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/minepump_spec4_product45.cil.c [2022-11-03 02:53:20,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/data/dbbd6c78e/ba3c54a6a58643b7b62b59dee2b4b840/FLAG969ccb0e6 [2022-11-03 02:53:21,246 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:53:21,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/sv-benchmarks/c/product-lines/minepump_spec4_product45.cil.c [2022-11-03 02:53:21,277 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/data/dbbd6c78e/ba3c54a6a58643b7b62b59dee2b4b840/FLAG969ccb0e6 [2022-11-03 02:53:21,550 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/data/dbbd6c78e/ba3c54a6a58643b7b62b59dee2b4b840 [2022-11-03 02:53:21,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:53:21,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:53:21,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:21,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:53:21,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:53:21,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:21" (1/1) ... [2022-11-03 02:53:21,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd1abb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:21, skipping insertion in model container [2022-11-03 02:53:21,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:53:21" (1/1) ... [2022-11-03 02:53:21,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:53:21,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:53:21,872 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/sv-benchmarks/c/product-lines/minepump_spec4_product45.cil.c[5266,5279] [2022-11-03 02:53:21,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:22,004 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:53:22,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/sv-benchmarks/c/product-lines/minepump_spec4_product45.cil.c[5266,5279] [2022-11-03 02:53:22,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:22,101 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:53:22,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22 WrapperNode [2022-11-03 02:53:22,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:22,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:22,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:53:22,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:53:22,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,160 INFO L138 Inliner]: procedures = 54, calls = 155, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 259 [2022-11-03 02:53:22,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:22,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:53:22,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:53:22,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:53:22,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:53:22,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:53:22,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:53:22,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:53:22,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (1/1) ... [2022-11-03 02:53:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:22,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:53:22,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:53:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:53:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-03 02:53:22,311 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-03 02:53:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:53:22,311 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:53:22,312 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:53:22,312 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:53:22,312 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-03 02:53:22,312 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-03 02:53:22,312 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2022-11-03 02:53:22,313 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2022-11-03 02:53:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-03 02:53:22,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-03 02:53:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:53:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-03 02:53:22,313 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-03 02:53:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:53:22,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:53:22,418 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:53:22,430 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:53:22,860 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:53:23,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:53:23,039 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:53:23,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:23 BoogieIcfgContainer [2022-11-03 02:53:23,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:53:23,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:53:23,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:53:23,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:53:23,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:53:21" (1/3) ... [2022-11-03 02:53:23,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339cb334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:23, skipping insertion in model container [2022-11-03 02:53:23,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:22" (2/3) ... [2022-11-03 02:53:23,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339cb334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:23, skipping insertion in model container [2022-11-03 02:53:23,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:23" (3/3) ... [2022-11-03 02:53:23,053 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product45.cil.c [2022-11-03 02:53:23,071 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:53:23,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:53:23,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:53:23,151 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;@2fd2d33f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:53:23,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:53:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:53:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:53:23,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:23,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:23,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1605759274, now seen corresponding path program 1 times [2022-11-03 02:53:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:23,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802191713] [2022-11-03 02:53:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:23,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:23,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802191713] [2022-11-03 02:53:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802191713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:23,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:23,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:53:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146050949] [2022-11-03 02:53:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:53:23,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:53:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:53:23,454 INFO L87 Difference]: Start difference. First operand has 57 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:23,575 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-11-03 02:53:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:53:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:53:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:23,595 INFO L225 Difference]: With dead ends: 112 [2022-11-03 02:53:23,595 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 02:53:23,601 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 [2022-11-03 02:53:23,607 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:23,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 02:53:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-03 02:53:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.303030303030303) internal successors, (43), 40 states have internal predecessors, (43), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:53:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-11-03 02:53:23,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2022-11-03 02:53:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:23,685 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-11-03 02:53:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-11-03 02:53:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:53:23,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:23,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:53:23,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2144199472, now seen corresponding path program 1 times [2022-11-03 02:53:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:23,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940195514] [2022-11-03 02:53:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:23,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:23,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940195514] [2022-11-03 02:53:23,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940195514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:23,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:23,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929993475] [2022-11-03 02:53:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:23,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:23,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:23,879 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:23,935 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-11-03 02:53:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:23,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:53:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:23,938 INFO L225 Difference]: With dead ends: 81 [2022-11-03 02:53:23,938 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 02:53:23,939 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 [2022-11-03 02:53:23,941 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:23,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 73 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:53:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 02:53:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-03 02:53:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 35 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:53:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-11-03 02:53:23,968 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 13 [2022-11-03 02:53:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-11-03 02:53:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-11-03 02:53:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:53:23,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:23,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:23,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:53:23,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1498124545, now seen corresponding path program 1 times [2022-11-03 02:53:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431779616] [2022-11-03 02:53:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:24,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:24,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431779616] [2022-11-03 02:53:24,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431779616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:24,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:24,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:53:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884572420] [2022-11-03 02:53:24,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:24,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:24,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:24,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:24,135 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:24,176 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2022-11-03 02:53:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 02:53:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:24,178 INFO L225 Difference]: With dead ends: 86 [2022-11-03 02:53:24,178 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 02:53:24,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:24,180 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:24,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:53:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 02:53:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-03 02:53:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:53:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-03 02:53:24,190 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 15 [2022-11-03 02:53:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:24,191 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-03 02:53:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-03 02:53:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:53:24,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:24,193 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] [2022-11-03 02:53:24,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:53:24,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:24,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2089748225, now seen corresponding path program 1 times [2022-11-03 02:53:24,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:24,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737849359] [2022-11-03 02:53:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:24,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:24,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737849359] [2022-11-03 02:53:24,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737849359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:24,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:24,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:24,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668965459] [2022-11-03 02:53:24,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:24,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:24,330 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 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) [2022-11-03 02:53:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:24,440 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-11-03 02:53:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 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 22 [2022-11-03 02:53:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:24,446 INFO L225 Difference]: With dead ends: 118 [2022-11-03 02:53:24,447 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 02:53:24,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:24,455 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:24,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 02:53:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-11-03 02:53:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 56 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-03 02:53:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-11-03 02:53:24,480 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 22 [2022-11-03 02:53:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:24,481 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-11-03 02:53:24,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 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) [2022-11-03 02:53:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-11-03 02:53:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:53:24,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:24,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:53:24,486 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1359815632, now seen corresponding path program 1 times [2022-11-03 02:53:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:24,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150367716] [2022-11-03 02:53:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:24,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150367716] [2022-11-03 02:53:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150367716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:24,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:24,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:24,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438276636] [2022-11-03 02:53:24,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:24,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:24,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:24,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:24,818 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:53:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:24,977 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2022-11-03 02:53:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:24,977 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-03 02:53:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:24,986 INFO L225 Difference]: With dead ends: 201 [2022-11-03 02:53:24,987 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 02:53:24,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:53:24,991 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 55 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:24,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 02:53:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2022-11-03 02:53:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 86 states have internal predecessors, (91), 18 states have call successors, (18), 18 states have call predecessors, (18), 20 states have return successors, (24), 19 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-03 02:53:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2022-11-03 02:53:25,020 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 26 [2022-11-03 02:53:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:25,021 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2022-11-03 02:53:25,021 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:53:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2022-11-03 02:53:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:53:25,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:25,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:53:25,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -417720562, now seen corresponding path program 1 times [2022-11-03 02:53:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:25,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903574556] [2022-11-03 02:53:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:53:25,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903574556] [2022-11-03 02:53:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903574556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:25,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:53:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692761769] [2022-11-03 02:53:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:25,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:53:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:53:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:25,189 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:53:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:25,367 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-11-03 02:53:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:53:25,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-11-03 02:53:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:25,375 INFO L225 Difference]: With dead ends: 325 [2022-11-03 02:53:25,375 INFO L226 Difference]: Without dead ends: 253 [2022-11-03 02:53:25,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:53:25,377 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 51 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:25,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 240 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-03 02:53:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 241. [2022-11-03 02:53:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 166 states have (on average 1.2228915662650603) internal successors, (203), 181 states have internal predecessors, (203), 33 states have call successors, (33), 33 states have call predecessors, (33), 41 states have return successors, (49), 39 states have call predecessors, (49), 33 states have call successors, (49) [2022-11-03 02:53:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 285 transitions. [2022-11-03 02:53:25,460 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 285 transitions. Word has length 47 [2022-11-03 02:53:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:25,461 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 285 transitions. [2022-11-03 02:53:25,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:53:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 285 transitions. [2022-11-03 02:53:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:53:25,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:25,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:25,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:53:25,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash 795292563, now seen corresponding path program 1 times [2022-11-03 02:53:25,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:25,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16264016] [2022-11-03 02:53:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:25,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:26,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16264016] [2022-11-03 02:53:26,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16264016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859089334] [2022-11-03 02:53:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:26,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:26,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:26,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:26,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:53:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:26,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:53:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:26,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:27,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859089334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1187460049] [2022-11-03 02:53:27,099 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-03 02:53:27,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:27,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:27,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:27,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:30,105 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2022-11-03 02:53:30,338 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 24 for LOIs [2022-11-03 02:53:30,496 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 48 for LOIs [2022-11-03 02:53:30,510 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 43 for LOIs [2022-11-03 02:53:30,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:36,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2751#(and (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (<= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| 0) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (<= ~methaneLevelCritical~0 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:53:36,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:53:36,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:36,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-11-03 02:53:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135724141] [2022-11-03 02:53:36,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:36,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:53:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:53:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2414, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:53:36,109 INFO L87 Difference]: Start difference. First operand 241 states and 285 transitions. Second operand has 24 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 10 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 02:53:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:40,643 INFO L93 Difference]: Finished difference Result 834 states and 1105 transitions. [2022-11-03 02:53:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-03 02:53:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 10 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 50 [2022-11-03 02:53:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:40,653 INFO L225 Difference]: With dead ends: 834 [2022-11-03 02:53:40,653 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 02:53:40,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1225, Invalid=10985, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 02:53:40,662 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 749 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:40,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 704 Invalid, 3607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:53:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 02:53:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 442. [2022-11-03 02:53:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 300 states have (on average 1.1933333333333334) internal successors, (358), 328 states have internal predecessors, (358), 64 states have call successors, (64), 64 states have call predecessors, (64), 77 states have return successors, (83), 72 states have call predecessors, (83), 64 states have call successors, (83) [2022-11-03 02:53:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 505 transitions. [2022-11-03 02:53:40,747 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 505 transitions. Word has length 50 [2022-11-03 02:53:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:40,748 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 505 transitions. [2022-11-03 02:53:40,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 10 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 02:53:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 505 transitions. [2022-11-03 02:53:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:53:40,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:40,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:40,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:40,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:53:40,966 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash 813157483, now seen corresponding path program 2 times [2022-11-03 02:53:40,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033584885] [2022-11-03 02:53:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:41,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033584885] [2022-11-03 02:53:41,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033584885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:41,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:41,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:53:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732479783] [2022-11-03 02:53:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:41,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:53:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:53:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:53:41,368 INFO L87 Difference]: Start difference. First operand 442 states and 505 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:53:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:42,049 INFO L93 Difference]: Finished difference Result 1030 states and 1210 transitions. [2022-11-03 02:53:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:53:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-11-03 02:53:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:42,053 INFO L225 Difference]: With dead ends: 1030 [2022-11-03 02:53:42,053 INFO L226 Difference]: Without dead ends: 707 [2022-11-03 02:53:42,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:53:42,056 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 187 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:42,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 145 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:53:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-03 02:53:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 631. [2022-11-03 02:53:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 436 states have (on average 1.1926605504587156) internal successors, (520), 472 states have internal predecessors, (520), 92 states have call successors, (92), 86 states have call predecessors, (92), 102 states have return successors, (122), 101 states have call predecessors, (122), 92 states have call successors, (122) [2022-11-03 02:53:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 734 transitions. [2022-11-03 02:53:42,149 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 734 transitions. Word has length 50 [2022-11-03 02:53:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:42,149 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 734 transitions. [2022-11-03 02:53:42,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:53:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 734 transitions. [2022-11-03 02:53:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:53:42,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:42,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:42,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:53:42,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:42,153 INFO L85 PathProgramCache]: Analyzing trace with hash 468771060, now seen corresponding path program 1 times [2022-11-03 02:53:42,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161957295] [2022-11-03 02:53:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:42,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:42,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:42,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161957295] [2022-11-03 02:53:42,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161957295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:42,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456271544] [2022-11-03 02:53:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:42,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:42,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:42,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:53:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:53:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:43,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:53:43,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456271544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:43,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [335777502] [2022-11-03 02:53:43,854 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-03 02:53:43,854 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:43,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:43,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:43,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:52,745 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 319 for LOIs [2022-11-03 02:53:52,804 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 29 for LOIs [2022-11-03 02:53:52,975 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 25 for LOIs [2022-11-03 02:53:53,063 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-03 02:53:53,081 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 26 for LOIs [2022-11-03 02:53:53,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:04,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7821#(and (<= ~methaneLevelCritical~0 1) (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (<= |old(~pumpRunning~0)| 1) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| 0) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:54:04,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:54:04,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:04,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 11] total 31 [2022-11-03 02:54:04,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412974729] [2022-11-03 02:54:04,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:04,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:54:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:54:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=3432, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:54:04,828 INFO L87 Difference]: Start difference. First operand 631 states and 734 transitions. Second operand has 31 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 28 states have internal predecessors, (100), 13 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-03 02:54:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:14,141 INFO L93 Difference]: Finished difference Result 1990 states and 2447 transitions. [2022-11-03 02:54:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-03 02:54:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 28 states have internal predecessors, (100), 13 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) Word has length 53 [2022-11-03 02:54:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:14,153 INFO L225 Difference]: With dead ends: 1990 [2022-11-03 02:54:14,154 INFO L226 Difference]: Without dead ends: 1635 [2022-11-03 02:54:14,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10907 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=3129, Invalid=26283, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:54:14,167 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 1780 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 3172 mSolverCounterSat, 1335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 4507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1335 IncrementalHoareTripleChecker+Valid, 3172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:14,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1783 Valid, 1077 Invalid, 4507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1335 Valid, 3172 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:54:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-03 02:54:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1079. [2022-11-03 02:54:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 752 states have (on average 1.1954787234042554) internal successors, (899), 811 states have internal predecessors, (899), 162 states have call successors, (162), 138 states have call predecessors, (162), 164 states have return successors, (229), 168 states have call predecessors, (229), 162 states have call successors, (229) [2022-11-03 02:54:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1290 transitions. [2022-11-03 02:54:14,307 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1290 transitions. Word has length 53 [2022-11-03 02:54:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:14,308 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1290 transitions. [2022-11-03 02:54:14,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 28 states have internal predecessors, (100), 13 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-03 02:54:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1290 transitions. [2022-11-03 02:54:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:54:14,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:14,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:14,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:14,527 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1946904264, now seen corresponding path program 1 times [2022-11-03 02:54:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412330754] [2022-11-03 02:54:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:54:15,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:15,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412330754] [2022-11-03 02:54:15,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412330754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:15,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121254028] [2022-11-03 02:54:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:15,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:15,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:15,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:54:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:54:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:54:15,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:54:15,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121254028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:15,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417992082] [2022-11-03 02:54:15,863 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:54:15,863 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:54:15,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:54:15,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:54:15,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:54:24,555 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 319 for LOIs [2022-11-03 02:54:24,626 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 29 for LOIs [2022-11-03 02:54:24,779 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 25 for LOIs [2022-11-03 02:54:24,982 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-03 02:54:24,994 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 26 for LOIs [2022-11-03 02:54:24,997 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 26 for LOIs [2022-11-03 02:54:24,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:36,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13306#(and (<= ~methaneLevelCritical~0 1) (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (<= |old(~pumpRunning~0)| 1) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (<= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| 0) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:54:36,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:54:36,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:36,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 24 [2022-11-03 02:54:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020820810] [2022-11-03 02:54:36,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:36,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:54:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:54:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:54:36,936 INFO L87 Difference]: Start difference. First operand 1079 states and 1290 transitions. Second operand has 24 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 9 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-03 02:54:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:43,752 INFO L93 Difference]: Finished difference Result 2692 states and 3371 transitions. [2022-11-03 02:54:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-03 02:54:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 9 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 77 [2022-11-03 02:54:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:43,764 INFO L225 Difference]: With dead ends: 2692 [2022-11-03 02:54:43,764 INFO L226 Difference]: Without dead ends: 1842 [2022-11-03 02:54:43,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8608 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=2533, Invalid=20723, Unknown=0, NotChecked=0, Total=23256 [2022-11-03 02:54:43,774 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1203 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 3503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:43,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 745 Invalid, 3503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:54:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-11-03 02:54:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1530. [2022-11-03 02:54:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1058 states have (on average 1.1814744801512287) internal successors, (1250), 1154 states have internal predecessors, (1250), 229 states have call successors, (229), 192 states have call predecessors, (229), 242 states have return successors, (379), 239 states have call predecessors, (379), 229 states have call successors, (379) [2022-11-03 02:54:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 1858 transitions. [2022-11-03 02:54:44,027 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 1858 transitions. Word has length 77 [2022-11-03 02:54:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:44,028 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 1858 transitions. [2022-11-03 02:54:44,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 9 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-03 02:54:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 1858 transitions. [2022-11-03 02:54:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:54:44,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:44,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:44,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:44,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:54:44,240 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1617332421, now seen corresponding path program 1 times [2022-11-03 02:54:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:44,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628191125] [2022-11-03 02:54:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:54:44,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628191125] [2022-11-03 02:54:44,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628191125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951407155] [2022-11-03 02:54:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:44,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:44,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:44,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:54:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:54:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:54:44,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:54:44,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951407155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:44,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290559343] [2022-11-03 02:54:44,899 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-03 02:54:44,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:54:44,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:54:44,900 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:54:44,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:54:48,919 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 42 for LOIs [2022-11-03 02:54:48,924 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-03 02:54:49,105 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 37 for LOIs [2022-11-03 02:54:49,277 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 36 for LOIs [2022-11-03 02:54:49,282 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 22 for LOIs [2022-11-03 02:54:49,284 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2022-11-03 02:54:49,286 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:54,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20550#(and (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (<= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| 0) (<= 0 ~methaneLevelCritical~0) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-03 02:54:54,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:54:54,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:54,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2022-11-03 02:54:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767032150] [2022-11-03 02:54:54,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:54:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:54:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1957, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:54:54,426 INFO L87 Difference]: Start difference. First operand 1530 states and 1858 transitions. Second operand has 18 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 6 states have call successors, (20), 4 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 02:54:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:55,676 INFO L93 Difference]: Finished difference Result 3748 states and 4658 transitions. [2022-11-03 02:54:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:54:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 6 states have call successors, (20), 4 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 81 [2022-11-03 02:54:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:55,696 INFO L225 Difference]: With dead ends: 3748 [2022-11-03 02:54:55,696 INFO L226 Difference]: Without dead ends: 2520 [2022-11-03 02:54:55,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 203 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=373, Invalid=3409, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:54:55,701 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 513 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:55,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 159 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:54:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-11-03 02:54:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2188. [2022-11-03 02:54:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1505 states have (on average 1.1754152823920265) internal successors, (1769), 1637 states have internal predecessors, (1769), 336 states have call successors, (336), 283 states have call predecessors, (336), 346 states have return successors, (531), 353 states have call predecessors, (531), 336 states have call successors, (531) [2022-11-03 02:54:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2636 transitions. [2022-11-03 02:54:56,018 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2636 transitions. Word has length 81 [2022-11-03 02:54:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:56,018 INFO L495 AbstractCegarLoop]: Abstraction has 2188 states and 2636 transitions. [2022-11-03 02:54:56,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 6.769230769230769) internal successors, (88), 14 states have internal predecessors, (88), 6 states have call successors, (20), 4 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 02:54:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2636 transitions. [2022-11-03 02:54:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:54:56,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:56,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:56,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:56,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1358442749, now seen corresponding path program 2 times [2022-11-03 02:54:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716470039] [2022-11-03 02:54:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:54:56,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:56,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716470039] [2022-11-03 02:54:56,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716470039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:56,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:56,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:54:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56220752] [2022-11-03 02:54:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:56,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:54:56,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:54:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:54:56,351 INFO L87 Difference]: Start difference. First operand 2188 states and 2636 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 02:54:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:56,788 INFO L93 Difference]: Finished difference Result 2353 states and 2855 transitions. [2022-11-03 02:54:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:54:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 81 [2022-11-03 02:54:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:56,800 INFO L225 Difference]: With dead ends: 2353 [2022-11-03 02:54:56,801 INFO L226 Difference]: Without dead ends: 2351 [2022-11-03 02:54:56,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:54:56,803 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:56,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:54:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-11-03 02:54:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2194. [2022-11-03 02:54:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1510 states have (on average 1.166887417218543) internal successors, (1762), 1641 states have internal predecessors, (1762), 336 states have call successors, (336), 283 states have call predecessors, (336), 347 states have return successors, (532), 354 states have call predecessors, (532), 336 states have call successors, (532) [2022-11-03 02:54:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2630 transitions. [2022-11-03 02:54:57,128 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2630 transitions. Word has length 81 [2022-11-03 02:54:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:57,128 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 2630 transitions. [2022-11-03 02:54:57,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 02:54:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2630 transitions. [2022-11-03 02:54:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:54:57,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:57,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:54:57,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash 164991796, now seen corresponding path program 1 times [2022-11-03 02:54:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:57,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183085910] [2022-11-03 02:54:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:57,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:54:57,155 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:54:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:54:57,209 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:54:57,210 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:54:57,211 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:54:57,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:54:57,216 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:57,220 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:54:57,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:54:57 BoogieIcfgContainer [2022-11-03 02:54:57,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:54:57,324 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:54:57,324 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:54:57,324 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:54:57,325 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:23" (3/4) ... [2022-11-03 02:54:57,327 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 02:54:57,436 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 02:54:57,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:54:57,437 INFO L158 Benchmark]: Toolchain (without parser) took 95883.33ms. Allocated memory was 83.9MB in the beginning and 738.2MB in the end (delta: 654.3MB). Free memory was 59.5MB in the beginning and 261.6MB in the end (delta: -202.1MB). Peak memory consumption was 453.0MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,437 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 56.0MB in the beginning and 55.9MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:54:57,438 INFO L158 Benchmark]: CACSL2BoogieTranslator took 546.74ms. Allocated memory is still 83.9MB. Free memory was 59.5MB in the beginning and 49.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,438 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.63ms. Allocated memory is still 83.9MB. Free memory was 49.7MB in the beginning and 47.4MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,439 INFO L158 Benchmark]: Boogie Preprocessor took 32.23ms. Allocated memory is still 83.9MB. Free memory was 47.4MB in the beginning and 45.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,439 INFO L158 Benchmark]: RCFGBuilder took 847.65ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 45.4MB in the beginning and 59.8MB in the end (delta: -14.3MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,440 INFO L158 Benchmark]: TraceAbstraction took 94280.18ms. Allocated memory was 100.7MB in the beginning and 738.2MB in the end (delta: 637.5MB). Free memory was 59.1MB in the beginning and 268.9MB in the end (delta: -209.8MB). Peak memory consumption was 426.1MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,441 INFO L158 Benchmark]: Witness Printer took 112.81ms. Allocated memory is still 738.2MB. Free memory was 268.9MB in the beginning and 261.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:54:57,442 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 83.9MB. Free memory was 56.0MB in the beginning and 55.9MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 546.74ms. Allocated memory is still 83.9MB. Free memory was 59.5MB in the beginning and 49.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.63ms. Allocated memory is still 83.9MB. Free memory was 49.7MB in the beginning and 47.4MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.23ms. Allocated memory is still 83.9MB. Free memory was 47.4MB in the beginning and 45.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 847.65ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 45.4MB in the beginning and 59.8MB in the end (delta: -14.3MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * TraceAbstraction took 94280.18ms. Allocated memory was 100.7MB in the beginning and 738.2MB in the end (delta: 637.5MB). Free memory was 59.1MB in the beginning and 268.9MB in the end (delta: -209.8MB). Peak memory consumption was 426.1MB. Max. memory is 16.1GB. * Witness Printer took 112.81ms. Allocated memory is still 738.2MB. Free memory was 268.9MB in the beginning and 261.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. 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: 327]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L127] int pumpRunning = 0; [L128] int systemActive = 1; [L501] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L725] int cleanupTimeShifts = 4; [L824] int waterLevel = 1; [L825] int methaneLevelCritical = 0; [L801] int retValue_acc ; [L802] int tmp ; [L806] FCALL select_helpers() [L807] FCALL select_features() [L808] CALL, EXPR valid_product() [L944] int retValue_acc ; [L947] retValue_acc = 1 [L948] return (retValue_acc); [L808] RET, EXPR valid_product() [L808] tmp = valid_product() [L810] COND TRUE \read(tmp) [L812] FCALL setup() [L813] CALL runTest() [L792] CALL test() [L55] int splverifierCounter ; [L56] int tmp ; [L57] int tmp___0 ; [L58] int tmp___1 ; [L59] int tmp___2 ; [L62] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L64] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L66] COND TRUE splverifierCounter < 4 [L72] tmp = __VERIFIER_nondet_int() [L74] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L76] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L842] COND TRUE waterLevel < 2 [L843] waterLevel = waterLevel + 1 [L76] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L82] tmp___0 = __VERIFIER_nondet_int() [L84] 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] [L92] tmp___2 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___2)) [L98] tmp___1 = __VERIFIER_nondet_int() [L100] COND TRUE \read(tmp___1) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=-1, tmp___2=0, waterLevel=2] [L107] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L135] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L142] COND TRUE \read(systemActive) [L144] CALL processEnvironment() [L190] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L193] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L208] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L164] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L167] COND TRUE ! pumpRunning [L169] CALL, EXPR isHighWaterLevel() [L304] int retValue_acc ; [L305] int tmp ; [L306] int tmp___0 ; [L310] CALL, EXPR isHighWaterSensorDry() [L904] int retValue_acc ; [L907] COND FALSE !(waterLevel < 2) [L911] retValue_acc = 0 [L912] return (retValue_acc); [L310] RET, EXPR isHighWaterSensorDry() [L310] tmp = isHighWaterSensorDry() [L312] COND FALSE !(\read(tmp)) [L315] tmp___0 = 1 [L317] retValue_acc = tmp___0 [L318] return (retValue_acc); [L169] RET, EXPR isHighWaterLevel() [L169] tmp = isHighWaterLevel() [L171] COND TRUE \read(tmp) [L173] CALL activatePump() [L223] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L227] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L248] int retValue_acc ; [L252] CALL, EXPR isMethaneLevelCritical() [L863] int retValue_acc ; [L866] retValue_acc = methaneLevelCritical [L867] return (retValue_acc); [L252] RET, EXPR isMethaneLevelCritical() [L252] retValue_acc = isMethaneLevelCritical() [L254] return (retValue_acc); [L227] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneAlarm()=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L227] tmp = isMethaneAlarm() [L229] COND FALSE !(\read(tmp)) [L233] CALL activatePump__wrappee__highWaterSensor() [L218] pumpRunning = 1 [L233] RET activatePump__wrappee__highWaterSensor() [L173] RET activatePump() [L208] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L144] RET processEnvironment() [L150] CALL __utac_acc__Specification4_spec__1() [L700] int tmp ; [L701] int tmp___0 ; [L705] CALL, EXPR getWaterLevel() [L895] int retValue_acc ; [L898] retValue_acc = waterLevel [L899] return (retValue_acc); [L705] RET, EXPR getWaterLevel() [L705] tmp = getWaterLevel() [L707] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L150] RET __utac_acc__Specification4_spec__1() [L107] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=-1, tmp___2=0, waterLevel=2] [L64] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=-1, tmp___2=0, waterLevel=2] [L66] COND TRUE splverifierCounter < 4 [L72] tmp = __VERIFIER_nondet_int() [L74] 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=-1, tmp___2=0, waterLevel=2] [L82] tmp___0 = __VERIFIER_nondet_int() [L84] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=-1, tmp___2=0, waterLevel=2] [L92] tmp___2 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___2)) [L98] tmp___1 = __VERIFIER_nondet_int() [L100] COND FALSE !(\read(tmp___1)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L107] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L135] COND TRUE \read(pumpRunning) [L137] CALL lowerWaterLevel() [L830] COND TRUE waterLevel > 0 [L831] waterLevel = waterLevel - 1 [L137] RET lowerWaterLevel() [L142] COND TRUE \read(systemActive) [L144] CALL processEnvironment() [L190] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L193] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L195] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L248] int retValue_acc ; [L252] CALL, EXPR isMethaneLevelCritical() [L863] int retValue_acc ; [L866] retValue_acc = methaneLevelCritical [L867] return (retValue_acc); [L252] RET, EXPR isMethaneLevelCritical() [L252] retValue_acc = isMethaneLevelCritical() [L254] return (retValue_acc); [L195] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneAlarm()=0, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L195] tmp = isMethaneAlarm() [L197] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L203] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L164] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L167] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L182] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L203] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L144] RET processEnvironment() [L150] CALL __utac_acc__Specification4_spec__1() [L700] int tmp ; [L701] int tmp___0 ; [L705] CALL, EXPR getWaterLevel() [L895] int retValue_acc ; [L898] retValue_acc = waterLevel [L899] return (retValue_acc); [L705] RET, EXPR getWaterLevel() [L705] tmp = getWaterLevel() [L707] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L150] RET __utac_acc__Specification4_spec__1() [L107] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=1] [L64] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=1] [L66] COND TRUE splverifierCounter < 4 [L72] tmp = __VERIFIER_nondet_int() [L74] 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=0, waterLevel=1] [L82] tmp___0 = __VERIFIER_nondet_int() [L84] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=1] [L92] tmp___2 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___2)) [L98] tmp___1 = __VERIFIER_nondet_int() [L100] COND FALSE !(\read(tmp___1)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=1] [L107] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L135] COND TRUE \read(pumpRunning) [L137] CALL lowerWaterLevel() [L830] COND TRUE waterLevel > 0 [L831] waterLevel = waterLevel - 1 [L137] RET lowerWaterLevel() [L142] COND TRUE \read(systemActive) [L144] CALL processEnvironment() [L190] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L193] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L195] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L248] int retValue_acc ; [L252] CALL, EXPR isMethaneLevelCritical() [L863] int retValue_acc ; [L866] retValue_acc = methaneLevelCritical [L867] return (retValue_acc); [L252] RET, EXPR isMethaneLevelCritical() [L252] retValue_acc = isMethaneLevelCritical() [L254] return (retValue_acc); [L195] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, isMethaneAlarm()=0, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L195] tmp = isMethaneAlarm() [L197] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L203] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L164] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L167] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L182] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L203] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L144] RET processEnvironment() [L150] CALL __utac_acc__Specification4_spec__1() [L700] int tmp ; [L701] int tmp___0 ; [L705] CALL, EXPR getWaterLevel() [L895] int retValue_acc ; [L898] retValue_acc = waterLevel [L899] return (retValue_acc); [L705] RET, EXPR getWaterLevel() [L705] tmp = getWaterLevel() [L707] COND TRUE tmp == 0 [L709] CALL, EXPR isPumpRunning() [L259] int retValue_acc ; [L262] retValue_acc = pumpRunning [L263] return (retValue_acc); [L709] RET, EXPR isPumpRunning() [L709] tmp___0 = isPumpRunning() [L711] COND TRUE \read(tmp___0) [L713] CALL __automaton_fail() [L327] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 94.1s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 24.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4692 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4664 mSDsluCounter, 3600 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3695 mSDsCounter, 3363 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9980 IncrementalHoareTripleChecker+Invalid, 13343 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3363 mSolverCounterUnsat, 766 mSDtfsCounter, 9980 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1252 GetRequests, 709 SyntacticMatches, 18 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24586 ImplicationChecksByTransitivity, 49.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2194occurred in iteration=12, InterpolantAutomatonStates: 356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 1693 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 874 NumberOfCodeBlocks, 874 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1029 ConstructedInterpolants, 0 QuantifiedInterpolants, 3852 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1791 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 373/483 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! [2022-11-03 02:54:57,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6885a4-7672-4c6e-8d3f-6dbabee0cd8b/bin/utaipan-7li7fVZpFI/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