./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product60.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_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/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_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product60.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/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_18302861-a175-43d6-be54-7076bad16947/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 a218bb67596641a4ce71d6987e627686ed630ab4299f0e9b54dfa98d78549c82 --- 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 17:39:32,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:32,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:32,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:32,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:32,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:32,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:32,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:32,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:32,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:32,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:32,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:32,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:32,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:32,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:32,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:32,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:32,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:32,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:32,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:32,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:32,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:32,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:32,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:32,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:32,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:32,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:32,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:32,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:32,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:32,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:32,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:32,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:32,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:32,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:32,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:32,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:32,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:32,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:32,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:32,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:32,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:39:32,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:32,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:32,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:32,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:32,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:32,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:32,265 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:32,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:32,265 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:32,265 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:32,267 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:32,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:32,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:32,268 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:32,268 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:32,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:32,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:32,269 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:32,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:32,270 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:39:32,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:32,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:39:32,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:32,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:32,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:32,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:32,272 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:39:32,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:32,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:32,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:32,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:32,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:32,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:32,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:32,276 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:32,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:32,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:32,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:32,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:32,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:32,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:32,278 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_18302861-a175-43d6-be54-7076bad16947/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a218bb67596641a4ce71d6987e627686ed630ab4299f0e9b54dfa98d78549c82 [2022-10-17 17:39:32,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:32,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:32,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:32,624 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:32,625 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:32,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/minepump_spec2_product60.cil.c [2022-10-17 17:39:32,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/data/61dbd5aa1/4592968596834d589fbe6652ff1867fe/FLAG828c25d39 [2022-10-17 17:39:33,365 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:33,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/sv-benchmarks/c/product-lines/minepump_spec2_product60.cil.c [2022-10-17 17:39:33,398 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/data/61dbd5aa1/4592968596834d589fbe6652ff1867fe/FLAG828c25d39 [2022-10-17 17:39:33,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/data/61dbd5aa1/4592968596834d589fbe6652ff1867fe [2022-10-17 17:39:33,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:33,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:33,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:33,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:33,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:33,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:33" (1/1) ... [2022-10-17 17:39:33,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2bd60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:33, skipping insertion in model container [2022-10-17 17:39:33,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:33" (1/1) ... [2022-10-17 17:39:33,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:33,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:33,959 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_18302861-a175-43d6-be54-7076bad16947/sv-benchmarks/c/product-lines/minepump_spec2_product60.cil.c[3241,3254] [2022-10-17 17:39:34,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:34,134 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:34,169 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_18302861-a175-43d6-be54-7076bad16947/sv-benchmarks/c/product-lines/minepump_spec2_product60.cil.c[3241,3254] [2022-10-17 17:39:34,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:34,276 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:34,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34 WrapperNode [2022-10-17 17:39:34,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:34,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:34,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:34,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:34,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,356 INFO L138 Inliner]: procedures = 59, calls = 160, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 282 [2022-10-17 17:39:34,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:34,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:34,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:34,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:34,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:34,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:34,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:34,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:34,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (1/1) ... [2022-10-17 17:39:34,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:34,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-10-17 17:39:34,514 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-10-17 17:39:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:39:34,514 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:39:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:39:34,515 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:39:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2022-10-17 17:39:34,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2022-10-17 17:39:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:39:34,516 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:39:34,516 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-10-17 17:39:34,516 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-10-17 17:39:34,517 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-10-17 17:39:34,517 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-10-17 17:39:34,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:34,517 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-10-17 17:39:34,518 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-10-17 17:39:34,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:34,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:34,619 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:34,621 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:35,160 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:35,364 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:35,365 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:39:35,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:35 BoogieIcfgContainer [2022-10-17 17:39:35,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:35,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:35,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:35,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:35,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:33" (1/3) ... [2022-10-17 17:39:35,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4c07f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:35, skipping insertion in model container [2022-10-17 17:39:35,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:34" (2/3) ... [2022-10-17 17:39:35,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4c07f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:35, skipping insertion in model container [2022-10-17 17:39:35,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:35" (3/3) ... [2022-10-17 17:39:35,385 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product60.cil.c [2022-10-17 17:39:35,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:35,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:39:35,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:35,499 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;@4759b1b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:35,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:39:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 51 states have internal predecessors, (61), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 17:39:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:39:35,529 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:35,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:35,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -998284583, now seen corresponding path program 1 times [2022-10-17 17:39:35,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:35,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760669721] [2022-10-17 17:39:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:35,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:35,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760669721] [2022-10-17 17:39:35,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760669721] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:35,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:35,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:39:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588972874] [2022-10-17 17:39:35,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:39:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:39:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:39:35,914 INFO L87 Difference]: Start difference. First operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 51 states have internal predecessors, (61), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:39:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:36,042 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-10-17 17:39:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:39:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-17 17:39:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:36,059 INFO L225 Difference]: With dead ends: 130 [2022-10-17 17:39:36,060 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 17:39:36,064 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 17:39:36,068 INFO L413 NwaCegarLoop]: 68 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, 68 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 17:39:36,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 17:39:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-17 17:39:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 17:39:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2022-10-17 17:39:36,118 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 17 [2022-10-17 17:39:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:36,118 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2022-10-17 17:39:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:39:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2022-10-17 17:39:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:39:36,122 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:36,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:36,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:36,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -753123146, now seen corresponding path program 1 times [2022-10-17 17:39:36,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:36,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966806246] [2022-10-17 17:39:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:36,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966806246] [2022-10-17 17:39:36,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966806246] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:36,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:36,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:39:36,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436839342] [2022-10-17 17:39:36,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:36,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:36,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:39:36,295 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:39:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:36,351 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2022-10-17 17:39:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-10-17 17:39:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:36,354 INFO L225 Difference]: With dead ends: 94 [2022-10-17 17:39:36,354 INFO L226 Difference]: Without dead ends: 53 [2022-10-17 17:39:36,356 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 17:39:36,357 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:36,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:39:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-17 17:39:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-10-17 17:39:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 17:39:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2022-10-17 17:39:36,371 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 18 [2022-10-17 17:39:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:36,371 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2022-10-17 17:39:36,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:39:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2022-10-17 17:39:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:39:36,374 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:36,374 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] [2022-10-17 17:39:36,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:39:36,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash 733716672, now seen corresponding path program 1 times [2022-10-17 17:39:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168804582] [2022-10-17 17:39:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:36,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:36,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168804582] [2022-10-17 17:39:36,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168804582] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:36,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:36,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:39:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253416526] [2022-10-17 17:39:36,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:39:36,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:39:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:39:36,685 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-10-17 17:39:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:36,824 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2022-10-17 17:39:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:39:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2022-10-17 17:39:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:36,829 INFO L225 Difference]: With dead ends: 138 [2022-10-17 17:39:36,829 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 17:39:36,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:39:36,832 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 92 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:36,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 141 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 17:39:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-10-17 17:39:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 66 states have internal predecessors, (76), 16 states have call successors, (16), 12 states have call predecessors, (16), 12 states have return successors, (17), 12 states have call predecessors, (17), 16 states have call successors, (17) [2022-10-17 17:39:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2022-10-17 17:39:36,876 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 21 [2022-10-17 17:39:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:36,876 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2022-10-17 17:39:36,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-10-17 17:39:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2022-10-17 17:39:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:39:36,878 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:36,878 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] [2022-10-17 17:39:36,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:39:36,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1549383013, now seen corresponding path program 1 times [2022-10-17 17:39:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:36,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750112969] [2022-10-17 17:39:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:36,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:37,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:37,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750112969] [2022-10-17 17:39:37,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750112969] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:37,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:37,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:39:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170765763] [2022-10-17 17:39:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:37,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:39:37,073 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:39:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:37,280 INFO L93 Difference]: Finished difference Result 244 states and 322 transitions. [2022-10-17 17:39:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:39:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-10-17 17:39:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:37,288 INFO L225 Difference]: With dead ends: 244 [2022-10-17 17:39:37,288 INFO L226 Difference]: Without dead ends: 162 [2022-10-17 17:39:37,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:39:37,303 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:37,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 278 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-10-17 17:39:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2022-10-17 17:39:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 120 states have internal predecessors, (137), 30 states have call successors, (30), 22 states have call predecessors, (30), 22 states have return successors, (32), 22 states have call predecessors, (32), 30 states have call successors, (32) [2022-10-17 17:39:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-10-17 17:39:37,368 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 24 [2022-10-17 17:39:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:37,369 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-10-17 17:39:37,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:39:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-10-17 17:39:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 17:39:37,377 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:37,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:39:37,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -44152356, now seen corresponding path program 1 times [2022-10-17 17:39:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413453095] [2022-10-17 17:39:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:37,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:37,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413453095] [2022-10-17 17:39:37,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413453095] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:37,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:37,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:39:37,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197404443] [2022-10-17 17:39:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:39:37,565 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:39:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:37,673 INFO L93 Difference]: Finished difference Result 236 states and 312 transitions. [2022-10-17 17:39:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-10-17 17:39:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:37,691 INFO L225 Difference]: With dead ends: 236 [2022-10-17 17:39:37,692 INFO L226 Difference]: Without dead ends: 234 [2022-10-17 17:39:37,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:39:37,693 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:37,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-10-17 17:39:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-10-17 17:39:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 153 states have (on average 1.3594771241830066) internal successors, (208), 182 states have internal predecessors, (208), 46 states have call successors, (46), 34 states have call predecessors, (46), 34 states have return successors, (55), 34 states have call predecessors, (55), 46 states have call successors, (55) [2022-10-17 17:39:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 309 transitions. [2022-10-17 17:39:37,735 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 309 transitions. Word has length 27 [2022-10-17 17:39:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:37,736 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 309 transitions. [2022-10-17 17:39:37,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:39:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 309 transitions. [2022-10-17 17:39:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 17:39:37,739 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:37,740 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:39:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:39:37,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash 93449741, now seen corresponding path program 1 times [2022-10-17 17:39:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:37,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189804110] [2022-10-17 17:39:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:39:38,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189804110] [2022-10-17 17:39:38,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189804110] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:38,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:38,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:39:38,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056742492] [2022-10-17 17:39:38,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:38,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:39:38,028 INFO L87 Difference]: Start difference. First operand 234 states and 309 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 17:39:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:38,426 INFO L93 Difference]: Finished difference Result 615 states and 835 transitions. [2022-10-17 17:39:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:39:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-10-17 17:39:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:38,433 INFO L225 Difference]: With dead ends: 615 [2022-10-17 17:39:38,434 INFO L226 Difference]: Without dead ends: 383 [2022-10-17 17:39:38,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:39:38,441 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 128 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:38,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 164 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:39:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-10-17 17:39:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 361. [2022-10-17 17:39:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 245 states have (on average 1.2612244897959184) internal successors, (309), 268 states have internal predecessors, (309), 57 states have call successors, (57), 51 states have call predecessors, (57), 58 states have return successors, (88), 58 states have call predecessors, (88), 57 states have call successors, (88) [2022-10-17 17:39:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 454 transitions. [2022-10-17 17:39:38,533 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 454 transitions. Word has length 48 [2022-10-17 17:39:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:38,535 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 454 transitions. [2022-10-17 17:39:38,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 17:39:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 454 transitions. [2022-10-17 17:39:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 17:39:38,542 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:38,543 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:38,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:39:38,544 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1308233817, now seen corresponding path program 1 times [2022-10-17 17:39:38,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:38,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249297164] [2022-10-17 17:39:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:38,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:39:38,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:38,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249297164] [2022-10-17 17:39:38,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249297164] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:38,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:38,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:39:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095131294] [2022-10-17 17:39:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:38,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:39:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:39:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:39:38,698 INFO L87 Difference]: Start difference. First operand 361 states and 454 transitions. Second operand has 4 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:39:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:38,874 INFO L93 Difference]: Finished difference Result 724 states and 910 transitions. [2022-10-17 17:39:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:39:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2022-10-17 17:39:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:38,880 INFO L225 Difference]: With dead ends: 724 [2022-10-17 17:39:38,881 INFO L226 Difference]: Without dead ends: 365 [2022-10-17 17:39:38,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:39:38,885 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 85 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:38,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:38,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-10-17 17:39:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 352. [2022-10-17 17:39:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.2510460251046025) internal successors, (299), 261 states have internal predecessors, (299), 55 states have call successors, (55), 49 states have call predecessors, (55), 57 states have return successors, (78), 57 states have call predecessors, (78), 55 states have call successors, (78) [2022-10-17 17:39:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 432 transitions. [2022-10-17 17:39:38,978 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 432 transitions. Word has length 65 [2022-10-17 17:39:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:38,979 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 432 transitions. [2022-10-17 17:39:38,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:39:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 432 transitions. [2022-10-17 17:39:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 17:39:38,982 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:38,983 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:38,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:39:38,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1521216682, now seen corresponding path program 1 times [2022-10-17 17:39:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656378565] [2022-10-17 17:39:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:39:39,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:39,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656378565] [2022-10-17 17:39:39,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656378565] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:39,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433575023] [2022-10-17 17:39:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:39,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:39,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:39,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:39,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:39:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-17 17:39:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:40,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:39:40,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433575023] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399844894] [2022-10-17 17:39:40,942 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2022-10-17 17:39:40,942 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:40,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:40,954 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:40,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:46,517 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 49 for LOIs [2022-10-17 17:39:47,166 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 44 for LOIs [2022-10-17 17:39:47,403 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 43 for LOIs [2022-10-17 17:39:47,411 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 306 for LOIs [2022-10-17 17:39:47,534 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 33 for LOIs [2022-10-17 17:39:47,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:54,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5791#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (= ~head~0.offset 0) (<= 1 |old(~methAndRunningLastTime~0)|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~11#1|) (= 1 ~systemActive~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1| 0)) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~11#1|) (<= |old(~methAndRunningLastTime~0)| 1) (<= 0 ~head~0.base) (<= |timeShift___utac_acc__Specification2_spec__2_~tmp~10#1| 1) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~10#1| ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~10#1| 0)) (<= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~methAndRunningLastTime~0 1) (<= 0 |timeShift___utac_acc__Specification2_spec__2_~tmp~10#1|) (<= 0 |#StackHeapBarrier|) (<= 1 ~methAndRunningLastTime~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-10-17 17:39:54,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:39:54,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:39:54,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 24 [2022-10-17 17:39:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478054401] [2022-10-17 17:39:54,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:39:54,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 17:39:54,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:54,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 17:39:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2583, Unknown=0, NotChecked=0, Total=2862 [2022-10-17 17:39:54,861 INFO L87 Difference]: Start difference. First operand 352 states and 432 transitions. Second operand has 24 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (18), 12 states have call predecessors, (18), 9 states have call successors, (18) [2022-10-17 17:39:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:58,911 INFO L93 Difference]: Finished difference Result 1497 states and 2176 transitions. [2022-10-17 17:39:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-10-17 17:39:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (18), 12 states have call predecessors, (18), 9 states have call successors, (18) Word has length 62 [2022-10-17 17:39:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:58,928 INFO L225 Difference]: With dead ends: 1497 [2022-10-17 17:39:58,928 INFO L226 Difference]: Without dead ends: 1104 [2022-10-17 17:39:58,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3453 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1015, Invalid=9085, Unknown=0, NotChecked=0, Total=10100 [2022-10-17 17:39:58,936 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 920 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:58,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 801 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-17 17:39:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-10-17 17:39:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 694. [2022-10-17 17:39:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 473 states have (on average 1.2262156448202959) internal successors, (580), 514 states have internal predecessors, (580), 109 states have call successors, (109), 95 states have call predecessors, (109), 111 states have return successors, (153), 112 states have call predecessors, (153), 109 states have call successors, (153) [2022-10-17 17:39:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 842 transitions. [2022-10-17 17:39:59,058 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 842 transitions. Word has length 62 [2022-10-17 17:39:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:59,059 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 842 transitions. [2022-10-17 17:39:59,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 9 states have call successors, (17), 6 states have call predecessors, (17), 13 states have return successors, (18), 12 states have call predecessors, (18), 9 states have call successors, (18) [2022-10-17 17:39:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 842 transitions. [2022-10-17 17:39:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-17 17:39:59,062 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:59,062 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-10-17 17:39:59,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:59,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 452822030, now seen corresponding path program 1 times [2022-10-17 17:39:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:59,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615176401] [2022-10-17 17:39:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:39:59,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615176401] [2022-10-17 17:39:59,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615176401] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741764341] [2022-10-17 17:39:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:59,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:59,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:59,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:59,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:40:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:40:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:40:00,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:00,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741764341] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:00,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:00,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-10-17 17:40:00,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971637892] [2022-10-17 17:40:00,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:00,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:40:00,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:40:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:40:00,117 INFO L87 Difference]: Start difference. First operand 694 states and 842 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:40:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:00,326 INFO L93 Difference]: Finished difference Result 1189 states and 1486 transitions. [2022-10-17 17:40:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:40:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-10-17 17:40:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:00,335 INFO L225 Difference]: With dead ends: 1189 [2022-10-17 17:40:00,335 INFO L226 Difference]: Without dead ends: 616 [2022-10-17 17:40:00,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:40:00,341 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 39 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:00,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 175 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-10-17 17:40:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 595. [2022-10-17 17:40:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 410 states have (on average 1.2170731707317073) internal successors, (499), 442 states have internal predecessors, (499), 92 states have call successors, (92), 83 states have call predecessors, (92), 92 states have return successors, (117), 96 states have call predecessors, (117), 92 states have call successors, (117) [2022-10-17 17:40:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 708 transitions. [2022-10-17 17:40:00,440 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 708 transitions. Word has length 68 [2022-10-17 17:40:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:00,441 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 708 transitions. [2022-10-17 17:40:00,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:40:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 708 transitions. [2022-10-17 17:40:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 17:40:00,446 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:00,446 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 17:40:00,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:00,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:00,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash -375909483, now seen corresponding path program 1 times [2022-10-17 17:40:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345751655] [2022-10-17 17:40:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:00,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 17:40:01,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:01,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345751655] [2022-10-17 17:40:01,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345751655] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609675653] [2022-10-17 17:40:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:01,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:01,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:01,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18302861-a175-43d6-be54-7076bad16947/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:40:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:01,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:40:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-17 17:40:01,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:01,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609675653] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:01,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:01,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-10-17 17:40:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556371296] [2022-10-17 17:40:01,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:40:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:40:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:40:01,871 INFO L87 Difference]: Start difference. First operand 595 states and 708 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10)