./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur --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 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- 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-38b53e6 [2022-11-25 22:39:57,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:39:57,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:39:57,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:39:57,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:39:57,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:39:57,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:39:57,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:39:57,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:39:57,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:39:57,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:39:57,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:39:57,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:39:57,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:39:57,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:39:57,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:39:57,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:39:57,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:39:57,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:39:57,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:39:57,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:39:57,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:39:57,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:39:57,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:39:57,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:39:57,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:39:57,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:39:57,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:39:57,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:39:57,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:39:57,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:39:57,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:39:57,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:39:57,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:39:57,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:39:57,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:39:57,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:39:57,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:39:57,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:39:57,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:39:57,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:39:57,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:39:57,889 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:39:57,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:39:57,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:39:57,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:39:57,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:39:57,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:39:57,899 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:39:57,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:39:57,899 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:39:57,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:39:57,908 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:39:57,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:39:57,909 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:39:57,909 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:39:57,909 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:39:57,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:39:57,910 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:39:57,910 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:39:57,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:39:57,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:39:57,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:39:57,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:39:57,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:39:57,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:39:57,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:39:57,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:39:57,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:39:57,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:39:57,915 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:39:57,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:39:57,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:39:57,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:39:57,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:39:57,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:39:57,917 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:39:57,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:39:57,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:39:57,919 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:39:57,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:39:57,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:39:57,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:39:57,920 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_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2022-11-25 22:39:58,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:39:58,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:39:58,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:39:58,253 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:39:58,254 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:39:58,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-25 22:40:01,341 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:40:01,559 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:40:01,560 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-25 22:40:01,571 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/data/dfd3e1a98/d91674cdf65040ee985581a8424087d6/FLAGe251ae171 [2022-11-25 22:40:01,594 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/data/dfd3e1a98/d91674cdf65040ee985581a8424087d6 [2022-11-25 22:40:01,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:40:01,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:40:01,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:40:01,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:40:01,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:40:01,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:40:01" (1/1) ... [2022-11-25 22:40:01,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d7b517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:01, skipping insertion in model container [2022-11-25 22:40:01,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:40:01" (1/1) ... [2022-11-25 22:40:01,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:40:01,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:40:01,892 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_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-25 22:40:02,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:40:02,035 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:40:02,058 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_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-25 22:40:02,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:40:02,113 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:40:02,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02 WrapperNode [2022-11-25 22:40:02,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:40:02,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:40:02,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:40:02,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:40:02,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,166 INFO L138 Inliner]: procedures = 65, calls = 124, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 300 [2022-11-25 22:40:02,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:40:02,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:40:02,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:40:02,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:40:02,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,196 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:40:02,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:40:02,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:40:02,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:40:02,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (1/1) ... [2022-11-25 22:40:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:40:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:40:02,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:40:02,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:40:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:40:02,285 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2022-11-25 22:40:02,286 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2022-11-25 22:40:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 22:40:02,286 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 22:40:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 22:40:02,286 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 22:40:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2022-11-25 22:40:02,286 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2022-11-25 22:40:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-25 22:40:02,287 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-25 22:40:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2022-11-25 22:40:02,287 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2022-11-25 22:40:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2022-11-25 22:40:02,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2022-11-25 22:40:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2022-11-25 22:40:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2022-11-25 22:40:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-25 22:40:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-25 22:40:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-25 22:40:02,288 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-25 22:40:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:40:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-11-25 22:40:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-11-25 22:40:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-25 22:40:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-25 22:40:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:40:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:40:02,443 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:40:02,445 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:40:02,922 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:40:03,027 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:40:03,028 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:40:03,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:40:03 BoogieIcfgContainer [2022-11-25 22:40:03,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:40:03,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:40:03,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:40:03,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:40:03,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:40:01" (1/3) ... [2022-11-25 22:40:03,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4a0227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:40:03, skipping insertion in model container [2022-11-25 22:40:03,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:40:02" (2/3) ... [2022-11-25 22:40:03,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4a0227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:40:03, skipping insertion in model container [2022-11-25 22:40:03,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:40:03" (3/3) ... [2022-11-25 22:40:03,041 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2022-11-25 22:40:03,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:40:03,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:40:03,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:40:03,119 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;@4df6e689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:40:03,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:40:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-25 22:40:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 22:40:03,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:03,157 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:03,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2053669219, now seen corresponding path program 1 times [2022-11-25 22:40:03,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:03,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274164869] [2022-11-25 22:40:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:40:03,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:03,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274164869] [2022-11-25 22:40:03,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274164869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:03,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:03,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:40:03,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741242767] [2022-11-25 22:40:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:40:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:40:03,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:40:03,585 INFO L87 Difference]: Start difference. First operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:40:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:03,713 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2022-11-25 22:40:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:40:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-11-25 22:40:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:03,733 INFO L225 Difference]: With dead ends: 204 [2022-11-25 22:40:03,733 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 22:40:03,739 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 [2022-11-25 22:40:03,744 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:03,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:40:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 22:40:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-25 22:40:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 78 states have internal predecessors, (85), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-25 22:40:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2022-11-25 22:40:03,813 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2022-11-25 22:40:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:03,816 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2022-11-25 22:40:03,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:40:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2022-11-25 22:40:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 22:40:03,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:03,826 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:40:03,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash -300617056, now seen corresponding path program 1 times [2022-11-25 22:40:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:03,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065380981] [2022-11-25 22:40:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:40:04,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:04,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065380981] [2022-11-25 22:40:04,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065380981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:04,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:04,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:40:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166204272] [2022-11-25 22:40:04,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:04,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:40:04,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:40:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:40:04,028 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:40:04,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:04,085 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2022-11-25 22:40:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:40:04,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2022-11-25 22:40:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:04,087 INFO L225 Difference]: With dead ends: 167 [2022-11-25 22:40:04,088 INFO L226 Difference]: Without dead ends: 97 [2022-11-25 22:40:04,089 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 [2022-11-25 22:40:04,090 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:04,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 212 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:40:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-25 22:40:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-25 22:40:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 73 states have internal predecessors, (79), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 22:40:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2022-11-25 22:40:04,103 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2022-11-25 22:40:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:04,103 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2022-11-25 22:40:04,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 22:40:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2022-11-25 22:40:04,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:40:04,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:04,106 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:04,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:40:04,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash -508373362, now seen corresponding path program 1 times [2022-11-25 22:40:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:04,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009924724] [2022-11-25 22:40:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:04,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 22:40:04,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009924724] [2022-11-25 22:40:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009924724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:04,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:04,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:40:04,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67877801] [2022-11-25 22:40:04,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:04,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:40:04,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:40:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:40:04,383 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-25 22:40:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:04,671 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-11-25 22:40:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:40:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-11-25 22:40:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:04,674 INFO L225 Difference]: With dead ends: 235 [2022-11-25 22:40:04,674 INFO L226 Difference]: Without dead ends: 154 [2022-11-25 22:40:04,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:40:04,676 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 82 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:04,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 538 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:40:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-25 22:40:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-11-25 22:40:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 112 states have internal predecessors, (126), 35 states have call successors, (35), 19 states have call predecessors, (35), 19 states have return successors, (45), 33 states have call predecessors, (45), 35 states have call successors, (45) [2022-11-25 22:40:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2022-11-25 22:40:04,726 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2022-11-25 22:40:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:04,727 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2022-11-25 22:40:04,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-25 22:40:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2022-11-25 22:40:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 22:40:04,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:04,730 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:04,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:40:04,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash -350046951, now seen corresponding path program 1 times [2022-11-25 22:40:04,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:04,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545276243] [2022-11-25 22:40:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:04,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:40:05,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:05,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545276243] [2022-11-25 22:40:05,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545276243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:05,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:05,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:40:05,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027755564] [2022-11-25 22:40:05,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:05,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:40:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:40:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:40:05,234 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 22:40:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:05,602 INFO L93 Difference]: Finished difference Result 421 states and 589 transitions. [2022-11-25 22:40:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:40:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) Word has length 67 [2022-11-25 22:40:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:05,606 INFO L225 Difference]: With dead ends: 421 [2022-11-25 22:40:05,607 INFO L226 Difference]: Without dead ends: 287 [2022-11-25 22:40:05,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:40:05,609 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 172 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:05,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 440 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:40:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-25 22:40:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2022-11-25 22:40:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 180 states have internal predecessors, (207), 50 states have call successors, (50), 29 states have call predecessors, (50), 32 states have return successors, (69), 50 states have call predecessors, (69), 50 states have call successors, (69) [2022-11-25 22:40:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-11-25 22:40:05,646 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 67 [2022-11-25 22:40:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:05,647 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-11-25 22:40:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 22:40:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-11-25 22:40:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 22:40:05,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:05,651 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:40:05,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash -307795689, now seen corresponding path program 1 times [2022-11-25 22:40:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568786114] [2022-11-25 22:40:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:40:06,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568786114] [2022-11-25 22:40:06,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568786114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:06,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:06,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:40:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326126745] [2022-11-25 22:40:06,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:06,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:40:06,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:40:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:40:06,140 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 22:40:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:06,872 INFO L93 Difference]: Finished difference Result 593 states and 814 transitions. [2022-11-25 22:40:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 22:40:06,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-11-25 22:40:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:06,882 INFO L225 Difference]: With dead ends: 593 [2022-11-25 22:40:06,883 INFO L226 Difference]: Without dead ends: 420 [2022-11-25 22:40:06,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:40:06,893 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 398 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:06,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 371 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:40:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-25 22:40:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2022-11-25 22:40:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 253 states have (on average 1.3122529644268774) internal successors, (332), 290 states have internal predecessors, (332), 76 states have call successors, (76), 43 states have call predecessors, (76), 51 states have return successors, (107), 82 states have call predecessors, (107), 76 states have call successors, (107) [2022-11-25 22:40:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2022-11-25 22:40:06,999 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 70 [2022-11-25 22:40:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:07,001 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2022-11-25 22:40:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 22:40:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2022-11-25 22:40:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 22:40:07,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:07,012 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:07,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:40:07,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 193950282, now seen corresponding path program 1 times [2022-11-25 22:40:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:07,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910006606] [2022-11-25 22:40:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:40:07,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:07,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910006606] [2022-11-25 22:40:07,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910006606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:07,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:40:07,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:40:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208042114] [2022-11-25 22:40:07,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:40:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:40:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:40:07,214 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:40:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:07,894 INFO L93 Difference]: Finished difference Result 802 states and 1146 transitions. [2022-11-25 22:40:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 22:40:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2022-11-25 22:40:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:07,901 INFO L225 Difference]: With dead ends: 802 [2022-11-25 22:40:07,901 INFO L226 Difference]: Without dead ends: 608 [2022-11-25 22:40:07,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:40:07,910 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 199 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:07,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 804 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:40:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-25 22:40:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 553. [2022-11-25 22:40:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 371 states have (on average 1.3099730458221024) internal successors, (486), 420 states have internal predecessors, (486), 104 states have call successors, (104), 67 states have call predecessors, (104), 77 states have return successors, (157), 110 states have call predecessors, (157), 104 states have call successors, (157) [2022-11-25 22:40:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 747 transitions. [2022-11-25 22:40:08,013 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 747 transitions. Word has length 88 [2022-11-25 22:40:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:08,015 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 747 transitions. [2022-11-25 22:40:08,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-25 22:40:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 747 transitions. [2022-11-25 22:40:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 22:40:08,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:08,021 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:40:08,021 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:08,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 139352533, now seen corresponding path program 1 times [2022-11-25 22:40:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:08,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719294132] [2022-11-25 22:40:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 22:40:08,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719294132] [2022-11-25 22:40:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719294132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:40:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803841692] [2022-11-25 22:40:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:40:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:40:08,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:40:08,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:40:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:40:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:40:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 22:40:08,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:40:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 22:40:08,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803841692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:40:08,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503841942] [2022-11-25 22:40:08,877 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-25 22:40:08,877 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:40:08,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:40:08,887 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:40:08,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:40:14,910 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 89 for LOIs [2022-11-25 22:40:14,936 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 65 for LOIs [2022-11-25 22:40:15,698 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 79 for LOIs [2022-11-25 22:40:15,850 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2022-11-25 22:40:15,858 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-25 22:40:15,884 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 77 for LOIs [2022-11-25 22:40:16,225 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-25 22:40:16,239 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:40:29,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6941#(and (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 |old(~pumpRunning~0)|) (= ~__SELECTED_FEATURE_methaneQuery~0 0) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= 2 |old(~waterLevel~0)|) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 2 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_lowWaterSensor~0 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-25 22:40:29,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:40:29,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:40:29,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-11-25 22:40:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801421328] [2022-11-25 22:40:29,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:40:29,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:40:29,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:40:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2989, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:40:29,025 INFO L87 Difference]: Start difference. First operand 553 states and 747 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-11-25 22:40:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:30,157 INFO L93 Difference]: Finished difference Result 1099 states and 1502 transitions. [2022-11-25 22:40:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:40:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 106 [2022-11-25 22:40:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:30,162 INFO L225 Difference]: With dead ends: 1099 [2022-11-25 22:40:30,162 INFO L226 Difference]: Without dead ends: 632 [2022-11-25 22:40:30,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=421, Invalid=4549, Unknown=0, NotChecked=0, Total=4970 [2022-11-25 22:40:30,166 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 254 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:30,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1017 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:40:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-25 22:40:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 543. [2022-11-25 22:40:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 356 states have (on average 1.2865168539325842) internal successors, (458), 400 states have internal predecessors, (458), 105 states have call successors, (105), 74 states have call predecessors, (105), 81 states have return successors, (147), 109 states have call predecessors, (147), 105 states have call successors, (147) [2022-11-25 22:40:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 710 transitions. [2022-11-25 22:40:30,220 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 710 transitions. Word has length 106 [2022-11-25 22:40:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:30,221 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 710 transitions. [2022-11-25 22:40:30,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2022-11-25 22:40:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 710 transitions. [2022-11-25 22:40:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-25 22:40:30,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:30,224 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:30,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:40:30,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:40:30,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash 567515878, now seen corresponding path program 1 times [2022-11-25 22:40:30,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634408607] [2022-11-25 22:40:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 22:40:30,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634408607] [2022-11-25 22:40:30,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634408607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:40:30,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237280496] [2022-11-25 22:40:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:30,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:40:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:40:30,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:40:30,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:40:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:40:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:40:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-25 22:40:30,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:40:30,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237280496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:40:30,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:40:30,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-25 22:40:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708294465] [2022-11-25 22:40:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:40:30,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:40:30,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:40:30,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:40:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:40:30,823 INFO L87 Difference]: Start difference. First operand 543 states and 710 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-25 22:40:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:40:30,924 INFO L93 Difference]: Finished difference Result 1222 states and 1618 transitions. [2022-11-25 22:40:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:40:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2022-11-25 22:40:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:40:30,940 INFO L225 Difference]: With dead ends: 1222 [2022-11-25 22:40:30,940 INFO L226 Difference]: Without dead ends: 714 [2022-11-25 22:40:30,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:40:30,942 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:40:30,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 254 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:40:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-25 22:40:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 697. [2022-11-25 22:40:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 462 states have (on average 1.29004329004329) internal successors, (596), 519 states have internal predecessors, (596), 131 states have call successors, (131), 95 states have call predecessors, (131), 103 states have return successors, (186), 132 states have call predecessors, (186), 131 states have call successors, (186) [2022-11-25 22:40:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 913 transitions. [2022-11-25 22:40:31,007 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 913 transitions. Word has length 131 [2022-11-25 22:40:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:40:31,008 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 913 transitions. [2022-11-25 22:40:31,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-25 22:40:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 913 transitions. [2022-11-25 22:40:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-25 22:40:31,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:40:31,012 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:40:31,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:40:31,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:40:31,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:40:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:40:31,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1334016935, now seen corresponding path program 2 times [2022-11-25 22:40:31,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:40:31,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869216743] [2022-11-25 22:40:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:40:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 22:40:31,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:31,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869216743] [2022-11-25 22:40:31,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869216743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:40:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172862657] [2022-11-25 22:40:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:40:31,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:40:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:40:31,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:40:31,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:40:31,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:40:31,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:40:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 22:40:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:40:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-25 22:40:31,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:40:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-25 22:40:32,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172862657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:40:32,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752139040] [2022-11-25 22:40:32,259 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-25 22:40:32,259 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:40:32,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:40:32,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:40:32,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:40:41,757 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 84 for LOIs [2022-11-25 22:40:41,767 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 81 for LOIs [2022-11-25 22:40:42,493 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 80 for LOIs [2022-11-25 22:40:42,630 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 53 for LOIs [2022-11-25 22:40:42,634 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-25 22:40:42,646 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 78 for LOIs [2022-11-25 22:40:42,870 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-25 22:40:42,881 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2022-11-25 22:40:42,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:41:01,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13777#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-25 22:41:01,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:41:01,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:41:01,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-25 22:41:01,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288415526] [2022-11-25 22:41:01,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:41:01,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:41:01,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:41:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=5660, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 22:41:01,135 INFO L87 Difference]: Start difference. First operand 697 states and 913 transitions. Second operand has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-11-25 22:41:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:07,078 INFO L93 Difference]: Finished difference Result 2312 states and 3143 transitions. [2022-11-25 22:41:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-25 22:41:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) Word has length 149 [2022-11-25 22:41:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:07,088 INFO L225 Difference]: With dead ends: 2312 [2022-11-25 22:41:07,088 INFO L226 Difference]: Without dead ends: 1655 [2022-11-25 22:41:07,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 404 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10466 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1948, Invalid=23812, Unknown=0, NotChecked=0, Total=25760 [2022-11-25 22:41:07,098 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1419 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 1436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 5169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1436 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:07,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 2558 Invalid, 5169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1436 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 22:41:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-25 22:41:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1104. [2022-11-25 22:41:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 723 states have (on average 1.2669432918395573) internal successors, (916), 814 states have internal predecessors, (916), 205 states have call successors, (205), 157 states have call predecessors, (205), 175 states have return successors, (315), 209 states have call predecessors, (315), 205 states have call successors, (315) [2022-11-25 22:41:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1436 transitions. [2022-11-25 22:41:07,225 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1436 transitions. Word has length 149 [2022-11-25 22:41:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:07,225 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1436 transitions. [2022-11-25 22:41:07,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-11-25 22:41:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1436 transitions. [2022-11-25 22:41:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 22:41:07,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:07,231 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:07,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:07,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1051969494, now seen corresponding path program 1 times [2022-11-25 22:41:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:07,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020687145] [2022-11-25 22:41:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 22:41:07,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020687145] [2022-11-25 22:41:07,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020687145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110947780] [2022-11-25 22:41:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:07,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:07,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:07,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:41:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:41:07,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 22:41:07,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:41:07,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110947780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:07,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:41:07,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 22:41:07,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506807183] [2022-11-25 22:41:07,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:07,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:41:07,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:41:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:07,694 INFO L87 Difference]: Start difference. First operand 1104 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:41:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:07,932 INFO L93 Difference]: Finished difference Result 3011 states and 3984 transitions. [2022-11-25 22:41:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:41:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2022-11-25 22:41:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:07,944 INFO L225 Difference]: With dead ends: 3011 [2022-11-25 22:41:07,945 INFO L226 Difference]: Without dead ends: 1940 [2022-11-25 22:41:07,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:07,951 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 73 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:07,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 256 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:41:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-25 22:41:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1911. [2022-11-25 22:41:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1270 states have (on average 1.252755905511811) internal successors, (1591), 1421 states have internal predecessors, (1591), 336 states have call successors, (336), 269 states have call predecessors, (336), 304 states have return successors, (551), 340 states have call predecessors, (551), 336 states have call successors, (551) [2022-11-25 22:41:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2478 transitions. [2022-11-25 22:41:08,208 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2478 transitions. Word has length 141 [2022-11-25 22:41:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:08,208 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 2478 transitions. [2022-11-25 22:41:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:41:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2478 transitions. [2022-11-25 22:41:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 22:41:08,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:08,215 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:08,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:08,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:41:08,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash -334588306, now seen corresponding path program 1 times [2022-11-25 22:41:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:08,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399753631] [2022-11-25 22:41:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:08,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 22:41:08,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:08,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399753631] [2022-11-25 22:41:08,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399753631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:08,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015511342] [2022-11-25 22:41:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:08,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:08,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:08,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:41:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:41:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 22:41:08,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:41:08,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015511342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:08,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:41:08,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 22:41:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496269909] [2022-11-25 22:41:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:41:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:41:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:08,678 INFO L87 Difference]: Start difference. First operand 1911 states and 2478 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:41:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:09,080 INFO L93 Difference]: Finished difference Result 5373 states and 7275 transitions. [2022-11-25 22:41:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:41:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2022-11-25 22:41:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:09,107 INFO L225 Difference]: With dead ends: 5373 [2022-11-25 22:41:09,107 INFO L226 Difference]: Without dead ends: 3480 [2022-11-25 22:41:09,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:09,117 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 72 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:09,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:41:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-11-25 22:41:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3460. [2022-11-25 22:41:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 2322 states have (on average 1.2472006890611542) internal successors, (2896), 2573 states have internal predecessors, (2896), 587 states have call successors, (587), 498 states have call predecessors, (587), 550 states have return successors, (1094), 579 states have call predecessors, (1094), 587 states have call successors, (1094) [2022-11-25 22:41:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 4577 transitions. [2022-11-25 22:41:09,616 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 4577 transitions. Word has length 141 [2022-11-25 22:41:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:09,617 INFO L495 AbstractCegarLoop]: Abstraction has 3460 states and 4577 transitions. [2022-11-25 22:41:09,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:41:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 4577 transitions. [2022-11-25 22:41:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-25 22:41:09,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:09,627 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:09,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:09,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:41:09,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -788679260, now seen corresponding path program 1 times [2022-11-25 22:41:09,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:09,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180485755] [2022-11-25 22:41:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-25 22:41:09,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180485755] [2022-11-25 22:41:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180485755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831330381] [2022-11-25 22:41:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:09,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:09,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:09,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:41:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:41:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 22:41:10,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:41:10,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831330381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:10,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:41:10,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 22:41:10,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236309929] [2022-11-25 22:41:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:41:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:41:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:10,117 INFO L87 Difference]: Start difference. First operand 3460 states and 4577 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-25 22:41:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:10,531 INFO L93 Difference]: Finished difference Result 5311 states and 6968 transitions. [2022-11-25 22:41:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:41:10,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 145 [2022-11-25 22:41:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:10,549 INFO L225 Difference]: With dead ends: 5311 [2022-11-25 22:41:10,549 INFO L226 Difference]: Without dead ends: 3609 [2022-11-25 22:41:10,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:10,556 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 69 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:10,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 294 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:41:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2022-11-25 22:41:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3489. [2022-11-25 22:41:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 2341 states have (on average 1.243912857753097) internal successors, (2912), 2594 states have internal predecessors, (2912), 589 states have call successors, (589), 510 states have call predecessors, (589), 558 states have return successors, (966), 576 states have call predecessors, (966), 589 states have call successors, (966) [2022-11-25 22:41:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4467 transitions. [2022-11-25 22:41:10,967 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4467 transitions. Word has length 145 [2022-11-25 22:41:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:10,968 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 4467 transitions. [2022-11-25 22:41:10,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-25 22:41:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4467 transitions. [2022-11-25 22:41:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 22:41:10,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:10,980 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:10,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:41:11,187 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 423489579, now seen corresponding path program 1 times [2022-11-25 22:41:11,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:11,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237585993] [2022-11-25 22:41:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:11,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-25 22:41:11,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237585993] [2022-11-25 22:41:11,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237585993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363873037] [2022-11-25 22:41:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:11,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:11,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:11,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:11,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:41:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:41:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 22:41:11,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:41:11,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363873037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:11,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:41:11,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 22:41:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593323392] [2022-11-25 22:41:11,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:41:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:41:11,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:11,520 INFO L87 Difference]: Start difference. First operand 3489 states and 4467 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:41:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:11,955 INFO L93 Difference]: Finished difference Result 5158 states and 6533 transitions. [2022-11-25 22:41:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:41:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 143 [2022-11-25 22:41:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:11,973 INFO L225 Difference]: With dead ends: 5158 [2022-11-25 22:41:11,974 INFO L226 Difference]: Without dead ends: 3506 [2022-11-25 22:41:11,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:11,982 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 62 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:11,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 304 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:41:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2022-11-25 22:41:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3448. [2022-11-25 22:41:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 2311 states have (on average 1.2397230636088274) internal successors, (2865), 2563 states have internal predecessors, (2865), 584 states have call successors, (584), 508 states have call predecessors, (584), 552 states have return successors, (843), 566 states have call predecessors, (843), 584 states have call successors, (843) [2022-11-25 22:41:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 4292 transitions. [2022-11-25 22:41:12,415 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 4292 transitions. Word has length 143 [2022-11-25 22:41:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:12,416 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 4292 transitions. [2022-11-25 22:41:12,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 22:41:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 4292 transitions. [2022-11-25 22:41:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-25 22:41:12,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:12,456 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:12,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:12,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:12,663 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1794741770, now seen corresponding path program 1 times [2022-11-25 22:41:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:12,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500549966] [2022-11-25 22:41:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 22:41:12,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:12,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500549966] [2022-11-25 22:41:12,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500549966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:12,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:12,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 22:41:12,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231984317] [2022-11-25 22:41:12,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:12,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:41:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:41:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:41:12,840 INFO L87 Difference]: Start difference. First operand 3448 states and 4292 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 22:41:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:14,028 INFO L93 Difference]: Finished difference Result 7651 states and 9569 transitions. [2022-11-25 22:41:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:41:14,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 145 [2022-11-25 22:41:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:14,060 INFO L225 Difference]: With dead ends: 7651 [2022-11-25 22:41:14,061 INFO L226 Difference]: Without dead ends: 6608 [2022-11-25 22:41:14,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:41:14,067 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 218 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:14,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 701 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:41:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2022-11-25 22:41:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 5499. [2022-11-25 22:41:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3715 states have (on average 1.2398384925975774) internal successors, (4606), 4092 states have internal predecessors, (4606), 915 states have call successors, (915), 814 states have call predecessors, (915), 868 states have return successors, (1308), 886 states have call predecessors, (1308), 915 states have call successors, (1308) [2022-11-25 22:41:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6829 transitions. [2022-11-25 22:41:14,827 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6829 transitions. Word has length 145 [2022-11-25 22:41:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:14,828 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 6829 transitions. [2022-11-25 22:41:14,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-25 22:41:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6829 transitions. [2022-11-25 22:41:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-25 22:41:14,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:14,844 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:14,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:41:14,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash 766411790, now seen corresponding path program 1 times [2022-11-25 22:41:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:14,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557479024] [2022-11-25 22:41:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:14,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 22:41:15,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557479024] [2022-11-25 22:41:15,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557479024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218021470] [2022-11-25 22:41:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:15,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:15,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:15,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:41:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 22:41:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 22:41:16,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:41:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 22:41:18,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218021470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:41:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28462227] [2022-11-25 22:41:18,022 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-25 22:41:18,022 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:41:18,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:41:18,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:41:18,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:41:23,668 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 85 for LOIs [2022-11-25 22:41:23,679 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 65 for LOIs [2022-11-25 22:41:24,524 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 84 for LOIs [2022-11-25 22:41:24,914 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2022-11-25 22:41:24,924 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-25 22:41:24,938 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 81 for LOIs [2022-11-25 22:41:25,272 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 85 for LOIs [2022-11-25 22:41:25,285 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 87 for LOIs [2022-11-25 22:41:25,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:41:42,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89479#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 |old(~pumpRunning~0)|) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 1) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-25 22:41:42,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:41:42,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:41:42,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 11] total 35 [2022-11-25 22:41:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457510162] [2022-11-25 22:41:42,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:41:42,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:41:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:42,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:41:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=6875, Unknown=0, NotChecked=0, Total=7656 [2022-11-25 22:41:42,183 INFO L87 Difference]: Start difference. First operand 5499 states and 6829 transitions. Second operand has 35 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 23 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (60), 22 states have call predecessors, (60), 23 states have call successors, (60) [2022-11-25 22:41:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:49,592 INFO L93 Difference]: Finished difference Result 14935 states and 19704 transitions. [2022-11-25 22:41:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 22:41:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 23 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (60), 22 states have call predecessors, (60), 23 states have call successors, (60) Word has length 145 [2022-11-25 22:41:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:49,655 INFO L225 Difference]: With dead ends: 14935 [2022-11-25 22:41:49,655 INFO L226 Difference]: Without dead ends: 12106 [2022-11-25 22:41:49,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 390 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10142 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1831, Invalid=19925, Unknown=0, NotChecked=0, Total=21756 [2022-11-25 22:41:49,676 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 2931 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 4859 mSolverCounterSat, 2066 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2931 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 6925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2066 IncrementalHoareTripleChecker+Valid, 4859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:49,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2931 Valid, 1662 Invalid, 6925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2066 Valid, 4859 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 22:41:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2022-11-25 22:41:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 8228. [2022-11-25 22:41:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8228 states, 5588 states have (on average 1.2349677881173944) internal successors, (6901), 6116 states have internal predecessors, (6901), 1363 states have call successors, (1363), 1193 states have call predecessors, (1363), 1276 states have return successors, (1873), 1315 states have call predecessors, (1873), 1363 states have call successors, (1873) [2022-11-25 22:41:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 10137 transitions. [2022-11-25 22:41:51,120 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 10137 transitions. Word has length 145 [2022-11-25 22:41:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:51,121 INFO L495 AbstractCegarLoop]: Abstraction has 8228 states and 10137 transitions. [2022-11-25 22:41:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 6.0) internal successors, (204), 34 states have internal predecessors, (204), 23 states have call successors, (55), 13 states have call predecessors, (55), 16 states have return successors, (60), 22 states have call predecessors, (60), 23 states have call successors, (60) [2022-11-25 22:41:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 10137 transitions. [2022-11-25 22:41:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-25 22:41:51,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:51,146 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:51,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:51,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:51,352 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215503, now seen corresponding path program 1 times [2022-11-25 22:41:51,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353537728] [2022-11-25 22:41:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-25 22:41:51,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:51,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353537728] [2022-11-25 22:41:51,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353537728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:51,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325875932] [2022-11-25 22:41:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:51,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:51,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:51,434 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:51,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:41:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:51,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:41:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 22:41:51,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:41:51,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325875932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:51,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:41:51,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 22:41:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139483214] [2022-11-25 22:41:51,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:51,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:41:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:41:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:51,638 INFO L87 Difference]: Start difference. First operand 8228 states and 10137 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-25 22:41:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:52,847 INFO L93 Difference]: Finished difference Result 17695 states and 22202 transitions. [2022-11-25 22:41:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:41:52,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 175 [2022-11-25 22:41:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:52,891 INFO L225 Difference]: With dead ends: 17695 [2022-11-25 22:41:52,891 INFO L226 Difference]: Without dead ends: 9795 [2022-11-25 22:41:52,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:41:52,920 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 75 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:52,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 238 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:41:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2022-11-25 22:41:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 9747. [2022-11-25 22:41:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 6685 states have (on average 1.2254300673148841) internal successors, (8192), 7211 states have internal predecessors, (8192), 1547 states have call successors, (1547), 1448 states have call predecessors, (1547), 1514 states have return successors, (2307), 1473 states have call predecessors, (2307), 1547 states have call successors, (2307) [2022-11-25 22:41:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 12046 transitions. [2022-11-25 22:41:54,356 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 12046 transitions. Word has length 175 [2022-11-25 22:41:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:54,357 INFO L495 AbstractCegarLoop]: Abstraction has 9747 states and 12046 transitions. [2022-11-25 22:41:54,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-25 22:41:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 12046 transitions. [2022-11-25 22:41:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-25 22:41:54,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:54,383 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:54,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:41:54,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:41:54,589 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:54,589 INFO L85 PathProgramCache]: Analyzing trace with hash 870997424, now seen corresponding path program 1 times [2022-11-25 22:41:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:54,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142427696] [2022-11-25 22:41:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 84 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-25 22:41:55,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:55,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142427696] [2022-11-25 22:41:55,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142427696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:41:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427732163] [2022-11-25 22:41:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:41:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:55,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:41:55,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:41:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 22:41:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:41:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 60 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 22:41:56,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:41:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 22:41:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427732163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:41:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456108195] [2022-11-25 22:41:58,813 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-25 22:41:58,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:41:58,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:41:58,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:41:58,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:42:08,206 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 80 for LOIs [2022-11-25 22:42:08,225 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 59 for LOIs [2022-11-25 22:42:08,620 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 58 for LOIs [2022-11-25 22:42:08,678 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-25 22:42:08,682 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-25 22:42:08,696 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 56 for LOIs [2022-11-25 22:42:08,962 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-25 22:42:08,968 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 58 for LOIs [2022-11-25 22:42:08,973 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 81 for LOIs [2022-11-25 22:42:08,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:42:29,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168157#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-25 22:42:29,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:42:29,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:42:29,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 40 [2022-11-25 22:42:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283646182] [2022-11-25 22:42:29,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:42:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 22:42:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 22:42:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=9263, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 22:42:29,547 INFO L87 Difference]: Start difference. First operand 9747 states and 12046 transitions. Second operand has 40 states, 34 states have (on average 6.264705882352941) internal successors, (213), 37 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) [2022-11-25 22:42:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:37,749 INFO L93 Difference]: Finished difference Result 18229 states and 22391 transitions. [2022-11-25 22:42:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 22:42:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 34 states have (on average 6.264705882352941) internal successors, (213), 37 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) Word has length 178 [2022-11-25 22:42:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:37,794 INFO L225 Difference]: With dead ends: 18229 [2022-11-25 22:42:37,794 INFO L226 Difference]: Without dead ends: 9940 [2022-11-25 22:42:37,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 475 SyntacticMatches, 11 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9602 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1810, Invalid=20242, Unknown=0, NotChecked=0, Total=22052 [2022-11-25 22:42:37,821 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 2491 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 4791 mSolverCounterSat, 1908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 6699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1908 IncrementalHoareTripleChecker+Valid, 4791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:37,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2498 Valid, 2131 Invalid, 6699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1908 Valid, 4791 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 22:42:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-11-25 22:42:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9772. [2022-11-25 22:42:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 6686 states have (on average 1.2104397247980856) internal successors, (8093), 7173 states have internal predecessors, (8093), 1582 states have call successors, (1582), 1473 states have call predecessors, (1582), 1503 states have return successors, (2146), 1511 states have call predecessors, (2146), 1582 states have call successors, (2146) [2022-11-25 22:42:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 11821 transitions. [2022-11-25 22:42:39,336 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 11821 transitions. Word has length 178 [2022-11-25 22:42:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:39,337 INFO L495 AbstractCegarLoop]: Abstraction has 9772 states and 11821 transitions. [2022-11-25 22:42:39,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 34 states have (on average 6.264705882352941) internal successors, (213), 37 states have internal predecessors, (213), 27 states have call successors, (60), 15 states have call predecessors, (60), 22 states have return successors, (63), 26 states have call predecessors, (63), 27 states have call successors, (63) [2022-11-25 22:42:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 11821 transitions. [2022-11-25 22:42:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-25 22:42:39,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:39,363 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:42:39,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:42:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:42:39,570 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash -633347556, now seen corresponding path program 1 times [2022-11-25 22:42:39,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:39,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198066134] [2022-11-25 22:42:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 126 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 22:42:41,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198066134] [2022-11-25 22:42:41,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198066134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:42:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030399929] [2022-11-25 22:42:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:42:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:42:41,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:42:41,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:42:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:41,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 22:42:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:42:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 153 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-25 22:42:42,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:42:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-25 22:42:44,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030399929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:42:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048144136] [2022-11-25 22:42:44,843 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-25 22:42:44,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:42:44,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:42:44,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:42:44,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:42:49,516 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 83 for LOIs [2022-11-25 22:42:49,532 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 64 for LOIs [2022-11-25 22:42:49,945 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 79 for LOIs [2022-11-25 22:42:50,442 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 72 for LOIs [2022-11-25 22:42:50,452 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-25 22:42:50,470 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 85 for LOIs [2022-11-25 22:42:50,945 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 84 for LOIs [2022-11-25 22:42:50,963 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 84 for LOIs [2022-11-25 22:42:50,974 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 87 for LOIs [2022-11-25 22:42:50,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:43:12,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212088#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (= ~methaneLevelCritical~0 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-25 22:43:12,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:43:12,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:43:12,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 48 [2022-11-25 22:43:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195356822] [2022-11-25 22:43:12,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:43:12,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 22:43:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 22:43:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=10090, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 22:43:12,064 INFO L87 Difference]: Start difference. First operand 9772 states and 11821 transitions. Second operand has 48 states, 46 states have (on average 5.934782608695652) internal successors, (273), 46 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 32 states have call predecessors, (72), 35 states have call successors, (72) [2022-11-25 22:43:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:26,015 INFO L93 Difference]: Finished difference Result 23383 states and 29660 transitions. [2022-11-25 22:43:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 22:43:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 5.934782608695652) internal successors, (273), 46 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 32 states have call predecessors, (72), 35 states have call successors, (72) Word has length 190 [2022-11-25 22:43:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:26,079 INFO L225 Difference]: With dead ends: 23383 [2022-11-25 22:43:26,079 INFO L226 Difference]: Without dead ends: 15667 [2022-11-25 22:43:26,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 532 SyntacticMatches, 18 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17158 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=3021, Invalid=34421, Unknown=0, NotChecked=0, Total=37442 [2022-11-25 22:43:26,105 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 3995 mSDsluCounter, 3839 mSDsCounter, 0 mSdLazyCounter, 9700 mSolverCounterSat, 3186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4002 SdHoareTripleChecker+Valid, 4098 SdHoareTripleChecker+Invalid, 12886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3186 IncrementalHoareTripleChecker+Valid, 9700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:26,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4002 Valid, 4098 Invalid, 12886 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3186 Valid, 9700 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-25 22:43:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15667 states. [2022-11-25 22:43:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15667 to 11874. [2022-11-25 22:43:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11874 states, 8109 states have (on average 1.2092736465655445) internal successors, (9806), 8702 states have internal predecessors, (9806), 1923 states have call successors, (1923), 1819 states have call predecessors, (1923), 1841 states have return successors, (2707), 1825 states have call predecessors, (2707), 1923 states have call successors, (2707) [2022-11-25 22:43:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 14436 transitions. [2022-11-25 22:43:27,824 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 14436 transitions. Word has length 190 [2022-11-25 22:43:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:27,824 INFO L495 AbstractCegarLoop]: Abstraction has 11874 states and 14436 transitions. [2022-11-25 22:43:27,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 5.934782608695652) internal successors, (273), 46 states have internal predecessors, (273), 35 states have call successors, (68), 13 states have call predecessors, (68), 22 states have return successors, (72), 32 states have call predecessors, (72), 35 states have call successors, (72) [2022-11-25 22:43:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 14436 transitions. [2022-11-25 22:43:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-25 22:43:27,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:27,852 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:27,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:43:28,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:43:28,059 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 231449596, now seen corresponding path program 2 times [2022-11-25 22:43:28,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959881571] [2022-11-25 22:43:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:28,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-25 22:43:30,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:30,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959881571] [2022-11-25 22:43:30,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959881571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:43:30,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112305509] [2022-11-25 22:43:30,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:43:30,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:43:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:43:30,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:43:30,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:43:30,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:43:30,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:43:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-25 22:43:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:43:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 149 proven. 149 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-25 22:43:31,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:43:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 133 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-25 22:43:34,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112305509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:43:34,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062194052] [2022-11-25 22:43:35,000 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-25 22:43:35,001 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:43:35,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:43:35,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:43:35,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:43:46,560 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 60 for LOIs [2022-11-25 22:43:46,564 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 59 for LOIs [2022-11-25 22:43:46,918 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 58 for LOIs [2022-11-25 22:43:46,983 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-25 22:43:46,987 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-25 22:43:46,998 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 56 for LOIs [2022-11-25 22:43:47,252 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-25 22:43:47,259 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 58 for LOIs [2022-11-25 22:43:47,264 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 81 for LOIs [2022-11-25 22:43:47,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:44:09,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '267253#(and (<= 0 (+ ~__SELECTED_FEATURE_lowWaterSensor~0 2147483648)) (<= ~__SELECTED_FEATURE_lowWaterSensor~0 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneQuery~0 2147483648)) (<= ~__SELECTED_FEATURE_highWaterSensor~0 2147483647) (<= 0 ~systemActive~0) (<= ~__GUIDSL_ROOT_PRODUCTION~0 1) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= 1 ~__GUIDSL_ROOT_PRODUCTION~0) (<= 1 ~__SELECTED_FEATURE_base~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (<= 0 (+ ~__SELECTED_FEATURE_methaneAlarm~0 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_startCommand~0)) (<= ~__SELECTED_FEATURE_methaneQuery~0 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (<= 0 (+ 2147483648 ~__SELECTED_FEATURE_highWaterSensor~0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= ~methaneLevelCritical~0 0) (<= ~__SELECTED_FEATURE_startCommand~0 2147483647) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= ~__SELECTED_FEATURE_methaneAlarm~0 2147483647) (<= ~head~0.base 0) (<= ~__SELECTED_FEATURE_base~0 1) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 (+ ~__SELECTED_FEATURE_stopCommand~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (<= ~__SELECTED_FEATURE_stopCommand~0 2147483647) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (<= |timeShift_getWaterLevel_~retValue_acc~1#1| 2147483647) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-25 22:44:09,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:44:09,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:44:09,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 25] total 71 [2022-11-25 22:44:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86857617] [2022-11-25 22:44:09,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:44:09,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 22:44:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:44:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 22:44:09,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1754, Invalid=15538, Unknown=0, NotChecked=0, Total=17292 [2022-11-25 22:44:09,525 INFO L87 Difference]: Start difference. First operand 11874 states and 14436 transitions. Second operand has 71 states, 63 states have (on average 5.0) internal successors, (315), 65 states have internal predecessors, (315), 43 states have call successors, (78), 19 states have call predecessors, (78), 31 states have return successors, (84), 43 states have call predecessors, (84), 43 states have call successors, (84) [2022-11-25 22:44:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:44:22,091 INFO L93 Difference]: Finished difference Result 21672 states and 26499 transitions. [2022-11-25 22:44:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-25 22:44:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 63 states have (on average 5.0) internal successors, (315), 65 states have internal predecessors, (315), 43 states have call successors, (78), 19 states have call predecessors, (78), 31 states have return successors, (84), 43 states have call predecessors, (84), 43 states have call successors, (84) Word has length 217 [2022-11-25 22:44:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:44:22,098 INFO L225 Difference]: With dead ends: 21672 [2022-11-25 22:44:22,098 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 22:44:22,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 590 SyntacticMatches, 11 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22179 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=6630, Invalid=47426, Unknown=0, NotChecked=0, Total=54056 [2022-11-25 22:44:22,140 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 3772 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 7398 mSolverCounterSat, 3274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3772 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 10672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3274 IncrementalHoareTripleChecker+Valid, 7398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:44:22,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3772 Valid, 3478 Invalid, 10672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3274 Valid, 7398 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 22:44:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 22:44:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 22:44:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 22:44:22,144 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2022-11-25 22:44:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:44:22,145 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 22:44:22,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 63 states have (on average 5.0) internal successors, (315), 65 states have internal predecessors, (315), 43 states have call successors, (78), 19 states have call predecessors, (78), 31 states have return successors, (84), 43 states have call predecessors, (84), 43 states have call successors, (84) [2022-11-25 22:44:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 22:44:22,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 22:44:22,148 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 22:44:22,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:44:22,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c94e5a02-3bfc-4f2b-bb81-b4d6cf460958/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:44:22,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 22:45:36,968 WARN L233 SmtUtils]: Spent 30.23s on a formula simplification. DAG size of input: 1046 DAG size of output: 903 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 22:46:25,946 WARN L233 SmtUtils]: Spent 46.66s on a formula simplification. DAG size of input: 1170 DAG size of output: 1133 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 22:47:49,517 WARN L233 SmtUtils]: Spent 54.09s on a formula simplification. DAG size of input: 539 DAG size of output: 472 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 22:49:52,411 WARN L233 SmtUtils]: Spent 2.03m on a formula simplification. DAG size of input: 1580 DAG size of output: 1357 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 22:50:08,156 WARN L233 SmtUtils]: Spent 12.75s on a formula simplification. DAG size of input: 863 DAG size of output: 722 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 22:50:51,513 WARN L233 SmtUtils]: Spent 39.02s on a formula simplification. DAG size of input: 1120 DAG size of output: 966 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-25 22:51:10,146 WARN L233 SmtUtils]: Spent 15.44s on a formula simplification. DAG size of input: 1074 DAG size of output: 75 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:51:28,635 WARN L233 SmtUtils]: Spent 18.39s on a formula simplification. DAG size of input: 1125 DAG size of output: 94 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:52:07,132 WARN L233 SmtUtils]: Spent 38.32s on a formula simplification. DAG size of input: 2060 DAG size of output: 145 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:52:37,417 WARN L233 SmtUtils]: Spent 22.20s on a formula simplification. DAG size of input: 1169 DAG size of output: 94 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:53:15,988 WARN L233 SmtUtils]: Spent 38.46s on a formula simplification. DAG size of input: 2060 DAG size of output: 145 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-25 22:54:03,912 WARN L233 SmtUtils]: Spent 40.96s on a formula simplification. DAG size of input: 2029 DAG size of output: 135 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)