./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW --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 cb82edc0720115a7daf634e8ab19e02bd974ec3bbe9487e9c9b9a9d3ab6ca10d --- 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-4e7fbc6 [2022-11-23 13:49:10,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:49:10,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:49:10,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:49:10,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:49:10,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:49:10,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:49:10,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:49:10,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:49:10,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:49:10,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:49:10,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:49:10,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:49:10,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:49:10,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:49:10,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:49:10,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:49:10,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:49:10,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:49:10,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:49:10,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:49:10,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:49:10,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:49:10,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:49:10,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:49:10,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:49:10,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:49:10,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:49:10,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:49:10,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:49:10,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:49:10,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:49:10,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:49:10,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:49:10,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:49:10,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:49:10,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:49:10,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:49:10,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:49:10,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:49:10,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:49:10,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:49:11,040 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:49:11,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:49:11,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:49:11,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:49:11,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:49:11,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:49:11,042 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:49:11,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:49:11,043 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:49:11,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:49:11,044 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:49:11,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:49:11,044 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:49:11,045 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:49:11,045 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:49:11,045 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:49:11,045 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:49:11,045 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:49:11,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:49:11,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:49:11,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:49:11,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:49:11,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:49:11,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:49:11,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:49:11,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:49:11,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:49:11,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:49:11,048 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:49:11,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:49:11,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:49:11,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:49:11,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:49:11,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:49:11,049 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:49:11,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:49:11,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:49:11,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:49:11,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:49:11,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:49:11,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:49:11,051 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_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb82edc0720115a7daf634e8ab19e02bd974ec3bbe9487e9c9b9a9d3ab6ca10d [2022-11-23 13:49:11,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:49:11,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:49:11,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:49:11,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:49:11,412 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:49:11,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c [2022-11-23 13:49:14,445 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:49:14,742 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:49:14,746 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c [2022-11-23 13:49:14,763 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/data/a5150ff67/a09aeeeb5b9b41a7a6659b6ea4611bd0/FLAG17b502fda [2022-11-23 13:49:14,779 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/data/a5150ff67/a09aeeeb5b9b41a7a6659b6ea4611bd0 [2022-11-23 13:49:14,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:49:14,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:49:14,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:49:14,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:49:14,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:49:14,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:14" (1/1) ... [2022-11-23 13:49:14,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a29d890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:14, skipping insertion in model container [2022-11-23 13:49:14,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:14" (1/1) ... [2022-11-23 13:49:14,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:49:14,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:49:15,155 WARN L237 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_c688ce05-aad4-4841-90b4-4eaa2c48164b/sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c[6627,6640] [2022-11-23 13:49:15,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:49:15,260 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:49:15,322 WARN L237 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_c688ce05-aad4-4841-90b4-4eaa2c48164b/sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c[6627,6640] [2022-11-23 13:49:15,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:49:15,385 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:49:15,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15 WrapperNode [2022-11-23 13:49:15,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:49:15,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:49:15,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:49:15,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:49:15,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,436 INFO L138 Inliner]: procedures = 54, calls = 96, calls flagged for inlining = 24, calls inlined = 20, statements flattened = 177 [2022-11-23 13:49:15,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:49:15,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:49:15,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:49:15,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:49:15,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:49:15,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:49:15,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:49:15,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:49:15,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (1/1) ... [2022-11-23 13:49:15,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:49:15,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:15,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:49:15,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:49:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:49:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-23 13:49:15,551 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-23 13:49:15,551 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 13:49:15,551 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 13:49:15,551 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 13:49:15,551 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 13:49:15,552 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-23 13:49:15,552 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-23 13:49:15,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:49:15,552 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-23 13:49:15,552 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-23 13:49:15,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:49:15,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:49:15,637 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:49:15,641 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:49:16,001 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:49:16,135 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:49:16,135 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 13:49:16,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:16 BoogieIcfgContainer [2022-11-23 13:49:16,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:49:16,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:49:16,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:49:16,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:49:16,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:49:14" (1/3) ... [2022-11-23 13:49:16,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77636339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:16, skipping insertion in model container [2022-11-23 13:49:16,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:15" (2/3) ... [2022-11-23 13:49:16,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77636339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:16, skipping insertion in model container [2022-11-23 13:49:16,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:16" (3/3) ... [2022-11-23 13:49:16,147 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product36.cil.c [2022-11-23 13:49:16,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:49:16,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:49:16,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:49:16,229 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;@52c7daae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:49:16,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:49:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 13:49:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:49:16,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:16,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:16,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:16,254 INFO L85 PathProgramCache]: Analyzing trace with hash -188142564, now seen corresponding path program 1 times [2022-11-23 13:49:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:16,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030483919] [2022-11-23 13:49:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:16,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030483919] [2022-11-23 13:49:16,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030483919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:16,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:16,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:49:16,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470186514] [2022-11-23 13:49:16,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 13:49:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 13:49:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:49:16,495 INFO L87 Difference]: Start difference. First operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:16,594 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2022-11-23 13:49:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 13:49:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:49:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:16,607 INFO L225 Difference]: With dead ends: 86 [2022-11-23 13:49:16,607 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 13:49:16,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:49:16,616 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:16,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 13:49:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 13:49:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:49:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-23 13:49:16,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2022-11-23 13:49:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:16,668 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-23 13:49:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-23 13:49:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:49:16,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:16,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:16,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:49:16,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1364986566, now seen corresponding path program 1 times [2022-11-23 13:49:16,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:16,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838577985] [2022-11-23 13:49:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:16,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:16,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838577985] [2022-11-23 13:49:16,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838577985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:16,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:16,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:49:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987853859] [2022-11-23 13:49:16,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:16,864 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:16,913 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-11-23 13:49:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:49:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:16,915 INFO L225 Difference]: With dead ends: 55 [2022-11-23 13:49:16,915 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 13:49:16,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:16,917 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:16,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:49:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 13:49:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 13:49:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 13:49:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-23 13:49:16,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2022-11-23 13:49:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:16,927 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-23 13:49:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-23 13:49:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:49:16,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:16,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:16,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:49:16,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1615885474, now seen corresponding path program 1 times [2022-11-23 13:49:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272350294] [2022-11-23 13:49:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:17,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:17,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272350294] [2022-11-23 13:49:17,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272350294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:17,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:17,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:49:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406153522] [2022-11-23 13:49:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:17,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:49:17,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:49:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:49:17,412 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:17,759 INFO L93 Difference]: Finished difference Result 145 states and 188 transitions. [2022-11-23 13:49:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 13:49:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 13:49:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:17,761 INFO L225 Difference]: With dead ends: 145 [2022-11-23 13:49:17,761 INFO L226 Difference]: Without dead ends: 116 [2022-11-23 13:49:17,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:49:17,763 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 98 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:17,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 162 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:49:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-23 13:49:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2022-11-23 13:49:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.3) internal successors, (78), 69 states have internal predecessors, (78), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-23 13:49:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-11-23 13:49:17,786 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 15 [2022-11-23 13:49:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:17,786 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-11-23 13:49:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-11-23 13:49:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 13:49:17,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:17,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:17,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:49:17,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -915157392, now seen corresponding path program 1 times [2022-11-23 13:49:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502130469] [2022-11-23 13:49:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:17,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:17,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502130469] [2022-11-23 13:49:17,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502130469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:17,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:17,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:49:17,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631136618] [2022-11-23 13:49:17,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:49:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:17,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:49:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:49:17,929 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:18,087 INFO L93 Difference]: Finished difference Result 294 states and 380 transitions. [2022-11-23 13:49:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:49:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 13:49:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:18,090 INFO L225 Difference]: With dead ends: 294 [2022-11-23 13:49:18,090 INFO L226 Difference]: Without dead ends: 210 [2022-11-23 13:49:18,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:49:18,093 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:18,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 126 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-23 13:49:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 171. [2022-11-23 13:49:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 120 states have (on average 1.275) internal successors, (153), 138 states have internal predecessors, (153), 23 states have call successors, (23), 23 states have call predecessors, (23), 27 states have return successors, (38), 23 states have call predecessors, (38), 23 states have call successors, (38) [2022-11-23 13:49:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 214 transitions. [2022-11-23 13:49:18,135 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 214 transitions. Word has length 18 [2022-11-23 13:49:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:18,135 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 214 transitions. [2022-11-23 13:49:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:49:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 214 transitions. [2022-11-23 13:49:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 13:49:18,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:18,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:49:18,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash -190408986, now seen corresponding path program 1 times [2022-11-23 13:49:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129802868] [2022-11-23 13:49:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:18,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:18,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129802868] [2022-11-23 13:49:18,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129802868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243871719] [2022-11-23 13:49:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:18,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:18,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:49:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 13:49:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:19,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243871719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792241268] [2022-11-23 13:49:19,716 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-23 13:49:19,716 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:19,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:19,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:19,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:21,639 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2022-11-23 13:49:21,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:49:23,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1744#(and (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-23 13:49:23,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:49:23,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:49:23,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 23 [2022-11-23 13:49:23,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965511919] [2022-11-23 13:49:23,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:49:23,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 13:49:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 13:49:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 13:49:23,820 INFO L87 Difference]: Start difference. First operand 171 states and 214 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 20 states have internal predecessors, (72), 5 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:49:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:26,870 INFO L93 Difference]: Finished difference Result 815 states and 1069 transitions. [2022-11-23 13:49:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-23 13:49:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 20 states have internal predecessors, (72), 5 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-23 13:49:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:26,888 INFO L225 Difference]: With dead ends: 815 [2022-11-23 13:49:26,888 INFO L226 Difference]: Without dead ends: 723 [2022-11-23 13:49:26,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1194, Invalid=5448, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 13:49:26,893 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 614 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:26,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 439 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 13:49:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-11-23 13:49:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 567. [2022-11-23 13:49:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 412 states have (on average 1.2766990291262137) internal successors, (526), 460 states have internal predecessors, (526), 68 states have call successors, (68), 68 states have call predecessors, (68), 86 states have return successors, (123), 71 states have call predecessors, (123), 68 states have call successors, (123) [2022-11-23 13:49:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 717 transitions. [2022-11-23 13:49:27,026 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 717 transitions. Word has length 31 [2022-11-23 13:49:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:27,027 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 717 transitions. [2022-11-23 13:49:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 20 states have internal predecessors, (72), 5 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:49:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 717 transitions. [2022-11-23 13:49:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 13:49:27,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:27,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:27,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:27,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:27,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1824145087, now seen corresponding path program 1 times [2022-11-23 13:49:27,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:27,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675643351] [2022-11-23 13:49:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:27,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675643351] [2022-11-23 13:49:27,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675643351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:27,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:27,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 13:49:27,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935381759] [2022-11-23 13:49:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:49:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:27,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:49:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:49:27,457 INFO L87 Difference]: Start difference. First operand 567 states and 717 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:49:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:27,698 INFO L93 Difference]: Finished difference Result 1163 states and 1476 transitions. [2022-11-23 13:49:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:49:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-11-23 13:49:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:27,703 INFO L225 Difference]: With dead ends: 1163 [2022-11-23 13:49:27,703 INFO L226 Difference]: Without dead ends: 598 [2022-11-23 13:49:27,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:49:27,709 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 69 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:27,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 94 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-23 13:49:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 577. [2022-11-23 13:49:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 419 states have (on average 1.2768496420047732) internal successors, (535), 468 states have internal predecessors, (535), 70 states have call successors, (70), 69 states have call predecessors, (70), 87 states have return successors, (126), 72 states have call predecessors, (126), 70 states have call successors, (126) [2022-11-23 13:49:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 731 transitions. [2022-11-23 13:49:27,810 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 731 transitions. Word has length 36 [2022-11-23 13:49:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:27,810 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 731 transitions. [2022-11-23 13:49:27,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:49:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 731 transitions. [2022-11-23 13:49:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 13:49:27,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:27,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:27,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:49:27,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash -922314615, now seen corresponding path program 1 times [2022-11-23 13:49:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:27,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830573181] [2022-11-23 13:49:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:27,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:49:28,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830573181] [2022-11-23 13:49:28,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830573181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570538695] [2022-11-23 13:49:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:28,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:28,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:28,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:28,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:49:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:28,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 13:49:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:49:28,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:49:29,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570538695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:29,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700174377] [2022-11-23 13:49:29,050 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 13:49:29,050 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:29,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:29,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:29,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:31,182 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 39 for LOIs [2022-11-23 13:49:31,189 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2022-11-23 13:49:31,264 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 25 for LOIs [2022-11-23 13:49:31,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:49:33,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7149#(and (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-23 13:49:33,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:49:33,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:49:33,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 11] total 26 [2022-11-23 13:49:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081165656] [2022-11-23 13:49:33,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:49:33,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 13:49:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 13:49:33,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1819, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 13:49:33,504 INFO L87 Difference]: Start difference. First operand 577 states and 731 transitions. Second operand has 26 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 7 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:49:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:35,781 INFO L93 Difference]: Finished difference Result 1609 states and 2140 transitions. [2022-11-23 13:49:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 13:49:35,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 7 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2022-11-23 13:49:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:35,798 INFO L225 Difference]: With dead ends: 1609 [2022-11-23 13:49:35,799 INFO L226 Difference]: Without dead ends: 1388 [2022-11-23 13:49:35,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=893, Invalid=5113, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 13:49:35,803 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 574 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:35,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 503 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:49:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-11-23 13:49:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1204. [2022-11-23 13:49:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 854 states have (on average 1.256440281030445) internal successors, (1073), 961 states have internal predecessors, (1073), 166 states have call successors, (166), 155 states have call predecessors, (166), 183 states have return successors, (304), 165 states have call predecessors, (304), 166 states have call successors, (304) [2022-11-23 13:49:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1543 transitions. [2022-11-23 13:49:35,993 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1543 transitions. Word has length 39 [2022-11-23 13:49:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:35,994 INFO L495 AbstractCegarLoop]: Abstraction has 1204 states and 1543 transitions. [2022-11-23 13:49:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 7 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:49:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1543 transitions. [2022-11-23 13:49:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 13:49:35,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:35,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:36,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:36,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:36,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2057916934, now seen corresponding path program 1 times [2022-11-23 13:49:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594955509] [2022-11-23 13:49:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:36,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:36,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594955509] [2022-11-23 13:49:36,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594955509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52538625] [2022-11-23 13:49:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:36,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:36,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:36,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:49:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 13:49:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:37,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:39,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52538625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:39,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298145582] [2022-11-23 13:49:39,437 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-23 13:49:39,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:39,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:39,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:39,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:43,399 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 137 for LOIs [2022-11-23 13:49:43,437 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 54 for LOIs [2022-11-23 13:49:43,591 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:49:48,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12080#(and (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~systemActive~0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (<= ~methaneLevelCritical~0 0) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-23 13:49:48,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:49:48,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:49:48,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 16] total 39 [2022-11-23 13:49:48,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567781774] [2022-11-23 13:49:48,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:49:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 13:49:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 13:49:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2979, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 13:49:48,428 INFO L87 Difference]: Start difference. First operand 1204 states and 1543 transitions. Second operand has 39 states, 35 states have (on average 2.942857142857143) internal successors, (103), 33 states have internal predecessors, (103), 9 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:50:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:01,521 INFO L93 Difference]: Finished difference Result 5380 states and 7178 transitions. [2022-11-23 13:50:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-23 13:50:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 2.942857142857143) internal successors, (103), 33 states have internal predecessors, (103), 9 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2022-11-23 13:50:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:01,551 INFO L225 Difference]: With dead ends: 5380 [2022-11-23 13:50:01,552 INFO L226 Difference]: Without dead ends: 4869 [2022-11-23 13:50:01,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10518 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4521, Invalid=24209, Unknown=0, NotChecked=0, Total=28730 [2022-11-23 13:50:01,566 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1343 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 4038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:01,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1354 Valid, 1187 Invalid, 4038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 13:50:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2022-11-23 13:50:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 3958. [2022-11-23 13:50:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 2787 states have (on average 1.2407606745604594) internal successors, (3458), 3156 states have internal predecessors, (3458), 554 states have call successors, (554), 504 states have call predecessors, (554), 616 states have return successors, (1159), 551 states have call predecessors, (1159), 554 states have call successors, (1159) [2022-11-23 13:50:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 5171 transitions. [2022-11-23 13:50:02,326 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 5171 transitions. Word has length 47 [2022-11-23 13:50:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:02,327 INFO L495 AbstractCegarLoop]: Abstraction has 3958 states and 5171 transitions. [2022-11-23 13:50:02,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 2.942857142857143) internal successors, (103), 33 states have internal predecessors, (103), 9 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-23 13:50:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 5171 transitions. [2022-11-23 13:50:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 13:50:02,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:02,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:02,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:02,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:02,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash -665578059, now seen corresponding path program 1 times [2022-11-23 13:50:02,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:02,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694585212] [2022-11-23 13:50:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:03,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:03,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694585212] [2022-11-23 13:50:03,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694585212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:03,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890888352] [2022-11-23 13:50:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:03,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:03,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:03,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:03,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:50:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 13:50:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:03,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:04,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890888352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496539268] [2022-11-23 13:50:04,528 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-23 13:50:04,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:04,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:04,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:04,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:05,690 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2022-11-23 13:50:05,796 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 25 for LOIs [2022-11-23 13:50:05,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:08,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27758#(and (<= 0 |#NULL.base|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| |timeShift_getWaterLevel_#res#1|) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (<= ~methaneLevelCritical~0 0) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4))' at error location [2022-11-23 13:50:08,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:08,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:08,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 32 [2022-11-23 13:50:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52068865] [2022-11-23 13:50:08,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:08,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 13:50:08,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:08,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 13:50:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 13:50:08,311 INFO L87 Difference]: Start difference. First operand 3958 states and 5171 transitions. Second operand has 32 states, 30 states have (on average 2.9) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 13:50:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:11,232 INFO L93 Difference]: Finished difference Result 8925 states and 11593 transitions. [2022-11-23 13:50:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 13:50:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.9) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 49 [2022-11-23 13:50:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:11,265 INFO L225 Difference]: With dead ends: 8925 [2022-11-23 13:50:11,266 INFO L226 Difference]: Without dead ends: 4866 [2022-11-23 13:50:11,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1060, Invalid=4946, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 13:50:11,283 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 503 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:11,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 496 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:50:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2022-11-23 13:50:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4536. [2022-11-23 13:50:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 3182 states have (on average 1.230043997485858) internal successors, (3914), 3568 states have internal predecessors, (3914), 659 states have call successors, (659), 616 states have call predecessors, (659), 694 states have return successors, (1228), 610 states have call predecessors, (1228), 659 states have call successors, (1228) [2022-11-23 13:50:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 5801 transitions. [2022-11-23 13:50:12,257 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 5801 transitions. Word has length 49 [2022-11-23 13:50:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:12,258 INFO L495 AbstractCegarLoop]: Abstraction has 4536 states and 5801 transitions. [2022-11-23 13:50:12,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.9) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 13:50:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 5801 transitions. [2022-11-23 13:50:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 13:50:12,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:12,263 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:12,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:12,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 13:50:12,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1029622765, now seen corresponding path program 1 times [2022-11-23 13:50:12,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:12,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616329191] [2022-11-23 13:50:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:12,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:50:13,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616329191] [2022-11-23 13:50:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616329191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67406272] [2022-11-23 13:50:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:13,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:13,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:13,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:50:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 13:50:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 13:50:13,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:50:14,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67406272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090745975] [2022-11-23 13:50:14,078 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 13:50:14,078 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:14,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:14,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:14,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:16,736 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 39 for LOIs [2022-11-23 13:50:16,743 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2022-11-23 13:50:16,845 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 25 for LOIs [2022-11-23 13:50:16,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:19,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49992#(and (<= 0 |#NULL.base|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| |timeShift_getWaterLevel_#res#1|) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~1#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (<= ~methaneLevelCritical~0 0) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (= |timeShift_getWaterLevel_~retValue_acc~10#1| |timeShift_getWaterLevel_#res#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4))' at error location [2022-11-23 13:50:19,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:19,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:19,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 29 [2022-11-23 13:50:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493882595] [2022-11-23 13:50:19,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:19,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 13:50:19,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 13:50:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2087, Unknown=0, NotChecked=0, Total=2352 [2022-11-23 13:50:19,556 INFO L87 Difference]: Start difference. First operand 4536 states and 5801 transitions. Second operand has 29 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 6 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-23 13:50:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:23,067 INFO L93 Difference]: Finished difference Result 8102 states and 10643 transitions. [2022-11-23 13:50:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 13:50:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 6 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2022-11-23 13:50:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:23,088 INFO L225 Difference]: With dead ends: 8102 [2022-11-23 13:50:23,088 INFO L226 Difference]: Without dead ends: 3633 [2022-11-23 13:50:23,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3523 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1098, Invalid=8214, Unknown=0, NotChecked=0, Total=9312 [2022-11-23 13:50:23,104 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 489 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:23,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 593 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:50:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2022-11-23 13:50:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3260. [2022-11-23 13:50:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 2311 states have (on average 1.23929035049762) internal successors, (2864), 2547 states have internal predecessors, (2864), 483 states have call successors, (483), 462 states have call predecessors, (483), 465 states have return successors, (825), 440 states have call predecessors, (825), 483 states have call successors, (825) [2022-11-23 13:50:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 4172 transitions. [2022-11-23 13:50:23,905 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 4172 transitions. Word has length 55 [2022-11-23 13:50:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:23,906 INFO L495 AbstractCegarLoop]: Abstraction has 3260 states and 4172 transitions. [2022-11-23 13:50:23,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 6 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-23 13:50:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 4172 transitions. [2022-11-23 13:50:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 13:50:23,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:23,910 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:50:23,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:24,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 13:50:24,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash -225307496, now seen corresponding path program 2 times [2022-11-23 13:50:24,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:24,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058622661] [2022-11-23 13:50:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:24,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:50:24,146 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 13:50:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:50:24,211 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 13:50:24,213 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 13:50:24,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 13:50:24,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:50:24,220 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:24,224 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 13:50:24,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:50:24 BoogieIcfgContainer [2022-11-23 13:50:24,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 13:50:24,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 13:50:24,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 13:50:24,303 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 13:50:24,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:16" (3/4) ... [2022-11-23 13:50:24,306 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 13:50:24,398 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 13:50:24,399 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 13:50:24,399 INFO L158 Benchmark]: Toolchain (without parser) took 69614.89ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 895.5MB). Free memory was 133.0MB in the beginning and 960.9MB in the end (delta: -828.0MB). Peak memory consumption was 68.3MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,400 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 13:50:24,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 597.75ms. Allocated memory is still 167.8MB. Free memory was 133.0MB in the beginning and 126.6MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,400 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.32ms. Allocated memory is still 167.8MB. Free memory was 126.6MB in the beginning and 124.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,401 INFO L158 Benchmark]: Boogie Preprocessor took 27.66ms. Allocated memory is still 167.8MB. Free memory was 124.5MB in the beginning and 123.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,401 INFO L158 Benchmark]: RCFGBuilder took 672.44ms. Allocated memory is still 167.8MB. Free memory was 122.4MB in the beginning and 100.0MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,402 INFO L158 Benchmark]: TraceAbstraction took 68162.01ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 895.5MB). Free memory was 99.3MB in the beginning and 967.2MB in the end (delta: -867.9MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,402 INFO L158 Benchmark]: Witness Printer took 96.54ms. Allocated memory is still 1.1GB. Free memory was 967.2MB in the beginning and 960.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-23 13:50:24,404 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 597.75ms. Allocated memory is still 167.8MB. Free memory was 133.0MB in the beginning and 126.6MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.32ms. Allocated memory is still 167.8MB. Free memory was 126.6MB in the beginning and 124.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.66ms. Allocated memory is still 167.8MB. Free memory was 124.5MB in the beginning and 123.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 672.44ms. Allocated memory is still 167.8MB. Free memory was 122.4MB in the beginning and 100.0MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 68162.01ms. Allocated memory was 167.8MB in the beginning and 1.1GB in the end (delta: 895.5MB). Free memory was 99.3MB in the beginning and 967.2MB in the end (delta: -867.9MB). Peak memory consumption was 30.0MB. Max. memory is 16.1GB. * Witness Printer took 96.54ms. Allocated memory is still 1.1GB. Free memory was 967.2MB in the beginning and 960.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 447]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L133] int pumpRunning = 0; [L134] int systemActive = 1; [L309] int cleanupTimeShifts = 4; [L621] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L819] int waterLevel = 1; [L820] int methaneLevelCritical = 0; [L385] int retValue_acc ; [L386] int tmp ; [L390] FCALL select_helpers() [L391] FCALL select_features() [L392] CALL, EXPR valid_product() [L434] int retValue_acc ; [L437] retValue_acc = 1 [L438] return (retValue_acc); [L392] RET, EXPR valid_product() [L392] tmp = valid_product() [L394] COND TRUE \read(tmp) [L396] FCALL setup() [L397] CALL runTest() [L376] CALL test() [L57] int splverifierCounter ; [L58] int tmp ; [L59] int tmp___0 ; [L60] int tmp___1 ; [L61] int tmp___2 ; [L64] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L66] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L68] COND TRUE splverifierCounter < 4 [L74] tmp = __VERIFIER_nondet_int() [L76] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L78] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L837] COND TRUE waterLevel < 2 [L838] waterLevel = waterLevel + 1 [L78] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L84] tmp___0 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L94] tmp___2 = __VERIFIER_nondet_int() [L96] COND FALSE !(\read(tmp___2)) [L102] tmp___1 = __VERIFIER_nondet_int() [L104] COND FALSE !(\read(tmp___1)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L113] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L141] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L148] COND TRUE \read(systemActive) [L150] CALL processEnvironment() [L170] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L173] COND TRUE ! pumpRunning [L175] CALL, EXPR isHighWaterLevel() [L267] int retValue_acc ; [L268] int tmp ; [L269] int tmp___0 ; [L273] CALL, EXPR isHighWaterSensorDry() [L899] int retValue_acc ; [L902] COND FALSE !(waterLevel < 2) [L906] retValue_acc = 0 [L907] return (retValue_acc); [L273] RET, EXPR isHighWaterSensorDry() [L273] tmp = isHighWaterSensorDry() [L275] COND FALSE !(\read(tmp)) [L278] tmp___0 = 1 [L280] retValue_acc = tmp___0 [L281] return (retValue_acc); [L175] RET, EXPR isHighWaterLevel() [L175] tmp = isHighWaterLevel() [L177] COND TRUE \read(tmp) [L179] CALL activatePump() [L198] pumpRunning = 1 [L179] RET activatePump() [L150] RET processEnvironment() [L156] CALL __utac_acc__Specification4_spec__1() [L914] int tmp ; [L915] int tmp___0 ; [L919] CALL, EXPR getWaterLevel() [L890] int retValue_acc ; [L893] retValue_acc = waterLevel [L894] return (retValue_acc); [L919] RET, EXPR getWaterLevel() [L919] tmp = getWaterLevel() [L921] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L156] RET __utac_acc__Specification4_spec__1() [L113] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L66] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L68] COND TRUE splverifierCounter < 4 [L74] tmp = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L84] tmp___0 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L94] tmp___2 = __VERIFIER_nondet_int() [L96] COND TRUE \read(tmp___2) [L98] CALL startSystem() [L304] systemActive = 1 [L98] RET startSystem() [L113] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L141] COND TRUE \read(pumpRunning) [L143] CALL lowerWaterLevel() [L825] COND TRUE waterLevel > 0 [L826] waterLevel = waterLevel - 1 [L143] RET lowerWaterLevel() [L148] COND TRUE \read(systemActive) [L150] CALL processEnvironment() [L170] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L173] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L188] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L150] RET processEnvironment() [L156] CALL __utac_acc__Specification4_spec__1() [L914] int tmp ; [L915] int tmp___0 ; [L919] CALL, EXPR getWaterLevel() [L890] int retValue_acc ; [L893] retValue_acc = waterLevel [L894] return (retValue_acc); [L919] RET, EXPR getWaterLevel() [L919] tmp = getWaterLevel() [L921] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L156] RET __utac_acc__Specification4_spec__1() [L113] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=1, waterLevel=1] [L66] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=1, waterLevel=1] [L68] COND TRUE splverifierCounter < 4 [L74] tmp = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=1, waterLevel=1] [L84] tmp___0 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=1, waterLevel=1] [L94] tmp___2 = __VERIFIER_nondet_int() [L96] COND FALSE !(\read(tmp___2)) [L102] tmp___1 = __VERIFIER_nondet_int() [L104] COND FALSE !(\read(tmp___1)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=1] [L113] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L141] COND TRUE \read(pumpRunning) [L143] CALL lowerWaterLevel() [L825] COND TRUE waterLevel > 0 [L826] waterLevel = waterLevel - 1 [L143] RET lowerWaterLevel() [L148] COND TRUE \read(systemActive) [L150] CALL processEnvironment() [L170] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L173] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L188] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L150] RET processEnvironment() [L156] CALL __utac_acc__Specification4_spec__1() [L914] int tmp ; [L915] int tmp___0 ; [L919] CALL, EXPR getWaterLevel() [L890] int retValue_acc ; [L893] retValue_acc = waterLevel [L894] return (retValue_acc); [L919] RET, EXPR getWaterLevel() [L919] tmp = getWaterLevel() [L921] COND TRUE tmp == 0 [L923] CALL, EXPR isPumpRunning() [L222] int retValue_acc ; [L225] retValue_acc = pumpRunning [L226] return (retValue_acc); [L923] RET, EXPR isPumpRunning() [L923] tmp___0 = isPumpRunning() [L925] COND TRUE \read(tmp___0) [L927] CALL __automaton_fail() [L447] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 68.0s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 26.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3823 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3782 mSDsluCounter, 3683 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3175 mSDsCounter, 2269 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7128 IncrementalHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2269 mSolverCounterUnsat, 508 mSDtfsCounter, 7128 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1095 GetRequests, 563 SyntacticMatches, 17 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20642 ImplicationChecksByTransitivity, 32.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4536occurred in iteration=9, InterpolantAutomatonStates: 340, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 2044 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 593 NumberOfCodeBlocks, 593 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 737 ConstructedInterpolants, 0 QuantifiedInterpolants, 5780 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1218 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 217/421 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 13:50:24,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c688ce05-aad4-4841-90b4-4eaa2c48164b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE