./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34b47c00ac265c7154b048b065075686f0b0d02157935b615817b802464c404c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:13:58,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:13:59,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:13:59,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:13:59,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:13:59,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:13:59,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:13:59,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:13:59,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:13:59,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:13:59,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:13:59,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:13:59,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:13:59,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:13:59,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:13:59,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:13:59,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:13:59,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:13:59,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:13:59,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:13:59,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:13:59,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:13:59,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:13:59,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:13:59,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:13:59,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:13:59,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:13:59,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:13:59,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:13:59,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:13:59,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:13:59,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:13:59,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:13:59,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:13:59,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:13:59,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:13:59,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:13:59,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:13:59,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:13:59,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:13:59,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:13:59,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:13:59,160 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:13:59,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:13:59,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:13:59,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:13:59,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:13:59,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:13:59,163 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:13:59,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:13:59,163 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:13:59,164 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:13:59,172 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:13:59,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:13:59,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:13:59,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:13:59,173 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:13:59,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:13:59,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:13:59,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:13:59,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:13:59,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:13:59,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:13:59,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:13:59,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:13:59,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:13:59,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:13:59,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:13:59,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:13:59,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:13:59,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:13:59,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:13:59,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:13:59,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:13:59,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:13:59,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:13:59,179 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:13:59,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:13:59,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:13:59,179 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:13:59,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:13:59,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:13:59,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:13:59,181 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_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34b47c00ac265c7154b048b065075686f0b0d02157935b615817b802464c404c [2022-10-17 17:13:59,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:13:59,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:13:59,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:13:59,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:13:59,508 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:13:59,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c [2022-10-17 17:13:59,590 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/data/4b1234184/3798e2c5c9b14f0b92264814d31466ec/FLAG4cd9ea34c [2022-10-17 17:14:00,269 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:14:00,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c [2022-10-17 17:14:00,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/data/4b1234184/3798e2c5c9b14f0b92264814d31466ec/FLAG4cd9ea34c [2022-10-17 17:14:00,479 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/data/4b1234184/3798e2c5c9b14f0b92264814d31466ec [2022-10-17 17:14:00,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:14:00,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:14:00,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:14:00,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:14:00,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:14:00,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:14:00" (1/1) ... [2022-10-17 17:14:00,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fefc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:00, skipping insertion in model container [2022-10-17 17:14:00,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:14:00" (1/1) ... [2022-10-17 17:14:00,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:14:00,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:14:00,872 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_642b8156-a10a-4e97-a575-fb639498c773/sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c[19180,19193] [2022-10-17 17:14:00,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:14:00,897 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:14:01,033 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_642b8156-a10a-4e97-a575-fb639498c773/sv-benchmarks/c/product-lines/minepump_spec5_product62.cil.c[19180,19193] [2022-10-17 17:14:01,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:14:01,063 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:14:01,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01 WrapperNode [2022-10-17 17:14:01,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:14:01,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:14:01,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:14:01,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:14:01,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,132 INFO L138 Inliner]: procedures = 60, calls = 164, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 297 [2022-10-17 17:14:01,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:14:01,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:14:01,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:14:01,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:14:01,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,162 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:14:01,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:14:01,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:14:01,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:14:01,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (1/1) ... [2022-10-17 17:14:01,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:14:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:14:01,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:14:01,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:14:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:14:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-10-17 17:14:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-10-17 17:14:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:14:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:14:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:14:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:14:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:14:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:14:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-10-17 17:14:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-10-17 17:14:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2022-10-17 17:14:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2022-10-17 17:14:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2022-10-17 17:14:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2022-10-17 17:14:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-10-17 17:14:01,266 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-10-17 17:14:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-10-17 17:14:01,266 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-10-17 17:14:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:14:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-10-17 17:14:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-10-17 17:14:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:14:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:14:01,423 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:14:01,426 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:14:01,927 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:14:02,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:14:02,116 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:14:02,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:14:02 BoogieIcfgContainer [2022-10-17 17:14:02,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:14:02,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:14:02,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:14:02,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:14:02,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:14:00" (1/3) ... [2022-10-17 17:14:02,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50134272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:14:02, skipping insertion in model container [2022-10-17 17:14:02,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:14:01" (2/3) ... [2022-10-17 17:14:02,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50134272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:14:02, skipping insertion in model container [2022-10-17 17:14:02,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:14:02" (3/3) ... [2022-10-17 17:14:02,133 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product62.cil.c [2022-10-17 17:14:02,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:14:02,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:14:02,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:14:02,244 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;@4e251f50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:14:02,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:14:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-10-17 17:14:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:14:02,271 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:02,272 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:02,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 442962897, now seen corresponding path program 1 times [2022-10-17 17:14:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:02,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680587585] [2022-10-17 17:14:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:14:02,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:02,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680587585] [2022-10-17 17:14:02,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680587585] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:02,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:02,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:14:02,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566201826] [2022-10-17 17:14:02,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:14:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:02,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:14:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:14:02,678 INFO L87 Difference]: Start difference. First operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:14:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:02,787 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2022-10-17 17:14:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:14:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-10-17 17:14:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:02,804 INFO L225 Difference]: With dead ends: 148 [2022-10-17 17:14:02,804 INFO L226 Difference]: Without dead ends: 70 [2022-10-17 17:14:02,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:14:02,815 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:02,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:14:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-17 17:14:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-10-17 17:14:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 51 states have internal predecessors, (55), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2022-10-17 17:14:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2022-10-17 17:14:02,876 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 21 [2022-10-17 17:14:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:02,878 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2022-10-17 17:14:02,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:14:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2022-10-17 17:14:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:14:02,886 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:02,886 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:02,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:14:02,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2021379213, now seen corresponding path program 1 times [2022-10-17 17:14:02,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862932629] [2022-10-17 17:14:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:02,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:14:03,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:03,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862932629] [2022-10-17 17:14:03,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862932629] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:03,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:03,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:14:03,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057548521] [2022-10-17 17:14:03,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:03,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:14:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:14:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:14:03,054 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:14:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:03,154 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2022-10-17 17:14:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:14:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-10-17 17:14:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:03,161 INFO L225 Difference]: With dead ends: 117 [2022-10-17 17:14:03,162 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 17:14:03,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:14:03,166 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:03,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 119 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:14:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 17:14:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-17 17:14:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 46 states have internal predecessors, (49), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:14:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-10-17 17:14:03,184 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 22 [2022-10-17 17:14:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:03,185 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-10-17 17:14:03,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:14:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-10-17 17:14:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:14:03,192 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:03,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:14:03,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 495074929, now seen corresponding path program 1 times [2022-10-17 17:14:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382729181] [2022-10-17 17:14:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:14:03,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:03,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382729181] [2022-10-17 17:14:03,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382729181] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:03,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:03,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:14:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882867365] [2022-10-17 17:14:03,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:03,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:14:03,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:03,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:14:03,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:14:03,516 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:14:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:03,786 INFO L93 Difference]: Finished difference Result 166 states and 218 transitions. [2022-10-17 17:14:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:14:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-17 17:14:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:03,791 INFO L225 Difference]: With dead ends: 166 [2022-10-17 17:14:03,791 INFO L226 Difference]: Without dead ends: 106 [2022-10-17 17:14:03,796 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 [2022-10-17 17:14:03,803 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 42 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:03,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 312 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:14:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-10-17 17:14:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-10-17 17:14:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.25) internal successors, (80), 72 states have internal predecessors, (80), 20 states have call successors, (20), 17 states have call predecessors, (20), 17 states have return successors, (26), 18 states have call predecessors, (26), 20 states have call successors, (26) [2022-10-17 17:14:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-10-17 17:14:03,831 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 24 [2022-10-17 17:14:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:03,832 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-10-17 17:14:03,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:14:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-10-17 17:14:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 17:14:03,833 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:03,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:03,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:14:03,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1823229499, now seen corresponding path program 1 times [2022-10-17 17:14:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:03,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189713170] [2022-10-17 17:14:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:03,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:14:04,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189713170] [2022-10-17 17:14:04,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189713170] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:04,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:04,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:14:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274081948] [2022-10-17 17:14:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:04,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:14:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:14:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:14:04,313 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:14:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:04,505 INFO L93 Difference]: Finished difference Result 289 states and 357 transitions. [2022-10-17 17:14:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:14:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2022-10-17 17:14:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:04,509 INFO L225 Difference]: With dead ends: 289 [2022-10-17 17:14:04,509 INFO L226 Difference]: Without dead ends: 189 [2022-10-17 17:14:04,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:14:04,511 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 107 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:04,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 266 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:14:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-17 17:14:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-10-17 17:14:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 129 states have internal predecessors, (142), 36 states have call successors, (36), 31 states have call predecessors, (36), 32 states have return successors, (48), 33 states have call predecessors, (48), 36 states have call successors, (48) [2022-10-17 17:14:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2022-10-17 17:14:04,541 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 41 [2022-10-17 17:14:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:04,541 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2022-10-17 17:14:04,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:14:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2022-10-17 17:14:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:14:04,544 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:04,544 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:14:04,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -203386622, now seen corresponding path program 1 times [2022-10-17 17:14:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:04,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996768173] [2022-10-17 17:14:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:14:04,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:04,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996768173] [2022-10-17 17:14:04,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996768173] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:04,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:04,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:14:04,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194490411] [2022-10-17 17:14:04,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:14:04,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:14:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:14:04,901 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 17:14:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:05,441 INFO L93 Difference]: Finished difference Result 435 states and 545 transitions. [2022-10-17 17:14:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 17:14:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-10-17 17:14:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:05,445 INFO L225 Difference]: With dead ends: 435 [2022-10-17 17:14:05,445 INFO L226 Difference]: Without dead ends: 305 [2022-10-17 17:14:05,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:14:05,447 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 236 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:05,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 270 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:14:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-10-17 17:14:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 275. [2022-10-17 17:14:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 177 states have (on average 1.231638418079096) internal successors, (218), 195 states have internal predecessors, (218), 51 states have call successors, (51), 39 states have call predecessors, (51), 46 states have return successors, (70), 52 states have call predecessors, (70), 51 states have call successors, (70) [2022-10-17 17:14:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 339 transitions. [2022-10-17 17:14:05,490 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 339 transitions. Word has length 44 [2022-10-17 17:14:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:05,490 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 339 transitions. [2022-10-17 17:14:05,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 17:14:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 339 transitions. [2022-10-17 17:14:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-17 17:14:05,492 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:05,492 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:05,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:14:05,493 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1805179232, now seen corresponding path program 1 times [2022-10-17 17:14:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:05,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420103437] [2022-10-17 17:14:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 17:14:05,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:05,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420103437] [2022-10-17 17:14:05,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420103437] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:14:05,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:14:05,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:14:05,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696494439] [2022-10-17 17:14:05,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:14:05,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:14:05,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:14:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:14:05,673 INFO L87 Difference]: Start difference. First operand 275 states and 339 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:14:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:06,151 INFO L93 Difference]: Finished difference Result 561 states and 726 transitions. [2022-10-17 17:14:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 17:14:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-10-17 17:14:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:06,155 INFO L225 Difference]: With dead ends: 561 [2022-10-17 17:14:06,155 INFO L226 Difference]: Without dead ends: 412 [2022-10-17 17:14:06,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:14:06,158 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 123 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:06,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 433 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:14:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-10-17 17:14:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 379. [2022-10-17 17:14:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 272 states have internal predecessors, (294), 70 states have call successors, (70), 54 states have call predecessors, (70), 64 states have return successors, (103), 70 states have call predecessors, (103), 70 states have call successors, (103) [2022-10-17 17:14:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 467 transitions. [2022-10-17 17:14:06,209 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 467 transitions. Word has length 61 [2022-10-17 17:14:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:06,210 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 467 transitions. [2022-10-17 17:14:06,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:14:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 467 transitions. [2022-10-17 17:14:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:14:06,213 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:06,213 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:14:06,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:14:06,214 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:06,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1711071724, now seen corresponding path program 1 times [2022-10-17 17:14:06,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:06,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264750977] [2022-10-17 17:14:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:06,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:14:06,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:06,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264750977] [2022-10-17 17:14:06,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264750977] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:14:06,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731071514] [2022-10-17 17:14:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:06,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:14:06,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:14:06,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:14:06,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:14:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:06,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 17:14:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:14:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:14:07,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:14:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:14:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731071514] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:14:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69624310] [2022-10-17 17:14:07,308 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-10-17 17:14:07,308 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:14:07,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:14:07,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:14:07,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:14:14,649 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 53 for LOIs [2022-10-17 17:14:14,662 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2022-10-17 17:14:15,100 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 44 for LOIs [2022-10-17 17:14:15,105 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 26 for LOIs [2022-10-17 17:14:15,163 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 26 for LOIs [2022-10-17 17:14:15,280 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 28 for LOIs [2022-10-17 17:14:15,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:14:24,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4943#(and (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2)) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (= |old(~waterLevel~0)| ~waterLevel~0) (<= 2 |timeShift_getWaterLevel_#res#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~switchedOnBeforeTS~0 0) (<= |timeShift_getWaterLevel_~retValue_acc~8#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= |old(~switchedOnBeforeTS~0)| 0))' at error location [2022-10-17 17:14:24,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:14:24,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:14:24,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-10-17 17:14:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179093293] [2022-10-17 17:14:24,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:14:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:14:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:14:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:14:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-10-17 17:14:24,791 INFO L87 Difference]: Start difference. First operand 379 states and 467 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:14:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:14:25,421 INFO L93 Difference]: Finished difference Result 1310 states and 1701 transitions. [2022-10-17 17:14:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:14:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 78 [2022-10-17 17:14:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:14:25,433 INFO L225 Difference]: With dead ends: 1310 [2022-10-17 17:14:25,433 INFO L226 Difference]: Without dead ends: 921 [2022-10-17 17:14:25,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 188 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2022-10-17 17:14:25,437 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 202 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:14:25,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 495 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:14:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-10-17 17:14:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 778. [2022-10-17 17:14:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 504 states have (on average 1.1984126984126984) internal successors, (604), 562 states have internal predecessors, (604), 140 states have call successors, (140), 118 states have call predecessors, (140), 133 states have return successors, (248), 138 states have call predecessors, (248), 140 states have call successors, (248) [2022-10-17 17:14:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 992 transitions. [2022-10-17 17:14:25,526 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 992 transitions. Word has length 78 [2022-10-17 17:14:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:14:25,527 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 992 transitions. [2022-10-17 17:14:25,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:14:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 992 transitions. [2022-10-17 17:14:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-10-17 17:14:25,531 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:14:25,531 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-10-17 17:14:25,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:14:25,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 17:14:25,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:14:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:14:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash 681535356, now seen corresponding path program 1 times [2022-10-17 17:14:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:14:25,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157029415] [2022-10-17 17:14:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:14:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:14:26,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:14:26,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157029415] [2022-10-17 17:14:26,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157029415] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:14:26,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784550401] [2022-10-17 17:14:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:14:26,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:14:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:14:26,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:14:26,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_642b8156-a10a-4e97-a575-fb639498c773/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:14:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:14:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-17 17:14:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:14:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:14:27,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:14:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 53 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-10-17 17:14:27,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784550401] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:14:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840632165] [2022-10-17 17:14:27,839 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2022-10-17 17:14:27,839 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:14:27,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:14:27,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:14:27,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs