./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 8393723b 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_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/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_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 07:57:31,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:57:31,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:57:31,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:57:31,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:57:31,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:57:31,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:57:31,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:57:31,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:57:31,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:57:31,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:57:31,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:57:31,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:57:31,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:57:31,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:57:31,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:57:31,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:57:31,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:57:31,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:57:31,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:57:31,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:57:31,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:57:31,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:57:31,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:57:31,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:57:31,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:57:31,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:57:31,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:57:31,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:57:31,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:57:31,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:57:31,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:57:31,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:57:31,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:57:31,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:57:31,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:57:31,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:57:31,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:57:31,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:57:31,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:57:31,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:57:31,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:57:31,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:57:31,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:57:31,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:57:31,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:57:31,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:57:31,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:57:31,628 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:57:31,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:57:31,629 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:57:31,629 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:57:31,629 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:57:31,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:57:31,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:57:31,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:57:31,630 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:57:31,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:57:31,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:57:31,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:57:31,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:57:31,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:57:31,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:57:31,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:57:31,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:57:31,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:57:31,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:57:31,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:57:31,634 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:57:31,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:57:31,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:57:31,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:57:31,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:57:31,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:57:31,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:31,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:57:31,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:57:31,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:57:31,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:57:31,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:57:31,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:57:31,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:57:31,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:57:31,639 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_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2022-11-19 07:57:31,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:57:31,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:57:31,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:57:31,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:57:31,960 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:57:31,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-19 07:57:32,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/data/031e71767/8d4db413a91d4d2b8a68335409fec2ac/FLAGac0cf42c6 [2022-11-19 07:57:32,770 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:57:32,771 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2022-11-19 07:57:32,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/data/031e71767/8d4db413a91d4d2b8a68335409fec2ac/FLAGac0cf42c6 [2022-11-19 07:57:33,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/data/031e71767/8d4db413a91d4d2b8a68335409fec2ac [2022-11-19 07:57:33,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:57:33,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:57:33,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:33,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:57:33,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:57:33,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9e3a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33, skipping insertion in model container [2022-11-19 07:57:33,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:57:33,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:57:33,420 WARN L234 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_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-19 07:57:33,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:33,523 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:57:33,552 WARN L234 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_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2022-11-19 07:57:33,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:33,626 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:57:33,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33 WrapperNode [2022-11-19 07:57:33,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:33,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:33,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:57:33,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:57:33,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,703 INFO L138 Inliner]: procedures = 65, calls = 124, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 300 [2022-11-19 07:57:33,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:33,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:57:33,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:57:33,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:57:33,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:57:33,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:57:33,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:57:33,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:57:33,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (1/1) ... [2022-11-19 07:57:33,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:33,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:57:33,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:57:33,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:57:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2022-11-19 07:57:33,883 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2022-11-19 07:57:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:57:33,883 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:57:33,884 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:57:33,884 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:57:33,884 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2022-11-19 07:57:33,884 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2022-11-19 07:57:33,884 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-19 07:57:33,885 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-19 07:57:33,885 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2022-11-19 07:57:33,885 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2022-11-19 07:57:33,885 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2022-11-19 07:57:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2022-11-19 07:57:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2022-11-19 07:57:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2022-11-19 07:57:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-19 07:57:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-19 07:57:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-19 07:57:33,887 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-19 07:57:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:57:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-11-19 07:57:33,887 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-11-19 07:57:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-19 07:57:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-19 07:57:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:57:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:57:34,036 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:57:34,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:57:34,544 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:57:34,664 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:57:34,664 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:57:34,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:34 BoogieIcfgContainer [2022-11-19 07:57:34,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:57:34,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:57:34,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:57:34,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:57:34,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:33" (1/3) ... [2022-11-19 07:57:34,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cdf314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:34, skipping insertion in model container [2022-11-19 07:57:34,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:33" (2/3) ... [2022-11-19 07:57:34,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cdf314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:34, skipping insertion in model container [2022-11-19 07:57:34,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:34" (3/3) ... [2022-11-19 07:57:34,679 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2022-11-19 07:57:34,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:57:34,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:57:34,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:57:34,818 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;@199e540, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:57:34,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:57:34,824 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) [2022-11-19 07:57:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:57:34,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:34,841 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] [2022-11-19 07:57:34,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2053669219, now seen corresponding path program 1 times [2022-11-19 07:57:34,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:34,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797613293] [2022-11-19 07:57:34,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:34,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:57:35,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:35,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797613293] [2022-11-19 07:57:35,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797613293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:35,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:35,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:57:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523192789] [2022-11-19 07:57:35,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:35,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:57:35,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:57:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:57:35,287 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) [2022-11-19 07:57:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:35,452 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2022-11-19 07:57:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:57:35,455 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 [2022-11-19 07:57:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:35,474 INFO L225 Difference]: With dead ends: 204 [2022-11-19 07:57:35,475 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:57:35,482 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 [2022-11-19 07:57:35,486 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-19 07:57:35,488 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] [2022-11-19 07:57:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:57:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 07:57:35,571 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) [2022-11-19 07:57:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2022-11-19 07:57:35,590 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2022-11-19 07:57:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:35,593 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2022-11-19 07:57:35,594 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) [2022-11-19 07:57:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2022-11-19 07:57:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:57:35,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:35,603 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] [2022-11-19 07:57:35,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:57:35,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash -300617056, now seen corresponding path program 1 times [2022-11-19 07:57:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:35,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108351754] [2022-11-19 07:57:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:35,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:57:35,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:35,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108351754] [2022-11-19 07:57:35,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108351754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:35,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:35,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529862004] [2022-11-19 07:57:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:35,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:35,821 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) [2022-11-19 07:57:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:35,952 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2022-11-19 07:57:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:35,953 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 [2022-11-19 07:57:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:35,956 INFO L225 Difference]: With dead ends: 167 [2022-11-19 07:57:35,958 INFO L226 Difference]: Without dead ends: 97 [2022-11-19 07:57:35,959 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 [2022-11-19 07:57:35,964 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:35,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 212 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:57:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-19 07:57:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-19 07:57:35,985 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) [2022-11-19 07:57:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2022-11-19 07:57:35,990 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2022-11-19 07:57:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:35,992 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2022-11-19 07:57:35,993 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) [2022-11-19 07:57:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2022-11-19 07:57:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:57:35,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:35,999 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] [2022-11-19 07:57:36,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:57:36,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -508373362, now seen corresponding path program 1 times [2022-11-19 07:57:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864231914] [2022-11-19 07:57:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:36,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 07:57:36,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:36,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864231914] [2022-11-19 07:57:36,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864231914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:36,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:36,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:57:36,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425742442] [2022-11-19 07:57:36,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:36,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:57:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:36,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:57:36,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:57:36,277 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) [2022-11-19 07:57:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:36,569 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-11-19 07:57:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:57:36,572 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 [2022-11-19 07:57:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:36,582 INFO L225 Difference]: With dead ends: 235 [2022-11-19 07:57:36,582 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:57:36,584 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 [2022-11-19 07:57:36,585 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 [2022-11-19 07:57:36,586 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] [2022-11-19 07:57:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:57:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-11-19 07:57:36,614 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) [2022-11-19 07:57:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2022-11-19 07:57:36,618 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2022-11-19 07:57:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:36,619 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2022-11-19 07:57:36,619 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) [2022-11-19 07:57:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2022-11-19 07:57:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:57:36,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:36,625 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] [2022-11-19 07:57:36,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:57:36,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash -350046951, now seen corresponding path program 1 times [2022-11-19 07:57:36,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:36,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918111345] [2022-11-19 07:57:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:57:37,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918111345] [2022-11-19 07:57:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918111345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:37,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:57:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039953934] [2022-11-19 07:57:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:57:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:37,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:57:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:57:37,320 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) [2022-11-19 07:57:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:37,761 INFO L93 Difference]: Finished difference Result 421 states and 589 transitions. [2022-11-19 07:57:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:57:37,762 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 [2022-11-19 07:57:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:37,783 INFO L225 Difference]: With dead ends: 421 [2022-11-19 07:57:37,783 INFO L226 Difference]: Without dead ends: 287 [2022-11-19 07:57:37,784 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 [2022-11-19 07:57:37,786 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 193 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:37,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 440 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:57:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-19 07:57:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2022-11-19 07:57:37,820 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) [2022-11-19 07:57:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-11-19 07:57:37,823 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 67 [2022-11-19 07:57:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:37,824 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-11-19 07:57:37,824 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) [2022-11-19 07:57:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-11-19 07:57:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:57:37,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:37,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:37,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:57:37,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:37,827 INFO L85 PathProgramCache]: Analyzing trace with hash -307795689, now seen corresponding path program 1 times [2022-11-19 07:57:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749802692] [2022-11-19 07:57:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:57:38,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:38,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749802692] [2022-11-19 07:57:38,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749802692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:38,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:38,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:57:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286829741] [2022-11-19 07:57:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:38,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:57:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:57:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:57:38,295 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) [2022-11-19 07:57:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:39,329 INFO L93 Difference]: Finished difference Result 593 states and 814 transitions. [2022-11-19 07:57:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:57:39,330 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 [2022-11-19 07:57:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:39,335 INFO L225 Difference]: With dead ends: 593 [2022-11-19 07:57:39,335 INFO L226 Difference]: Without dead ends: 420 [2022-11-19 07:57:39,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:57:39,338 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 422 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:39,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 371 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:57:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-19 07:57:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2022-11-19 07:57:39,416 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) [2022-11-19 07:57:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2022-11-19 07:57:39,422 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 70 [2022-11-19 07:57:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:39,426 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2022-11-19 07:57:39,426 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) [2022-11-19 07:57:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2022-11-19 07:57:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:57:39,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:39,433 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] [2022-11-19 07:57:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:57:39,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash 193950282, now seen corresponding path program 1 times [2022-11-19 07:57:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:39,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838228564] [2022-11-19 07:57:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:57:39,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838228564] [2022-11-19 07:57:39,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838228564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:39,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:39,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:57:39,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486823509] [2022-11-19 07:57:39,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:39,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:57:39,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:57:39,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:57:39,654 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) [2022-11-19 07:57:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:40,525 INFO L93 Difference]: Finished difference Result 802 states and 1146 transitions. [2022-11-19 07:57:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:57:40,526 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 [2022-11-19 07:57:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:40,531 INFO L225 Difference]: With dead ends: 802 [2022-11-19 07:57:40,531 INFO L226 Difference]: Without dead ends: 608 [2022-11-19 07:57:40,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:57:40,539 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 199 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 804 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:57:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-19 07:57:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 553. [2022-11-19 07:57:40,655 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) [2022-11-19 07:57:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 747 transitions. [2022-11-19 07:57:40,660 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 747 transitions. Word has length 88 [2022-11-19 07:57:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:40,661 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 747 transitions. [2022-11-19 07:57:40,662 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) [2022-11-19 07:57:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 747 transitions. [2022-11-19 07:57:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:57:40,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:40,670 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] [2022-11-19 07:57:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:57:40,673 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash 139352533, now seen corresponding path program 1 times [2022-11-19 07:57:40,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:40,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64254578] [2022-11-19 07:57:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:40,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 07:57:40,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:40,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64254578] [2022-11-19 07:57:40,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64254578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:57:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852918682] [2022-11-19 07:57:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:40,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:40,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:40,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:40,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:57:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:57:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:57:41,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:57:41,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852918682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778756084] [2022-11-19 07:57:41,736 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-19 07:57:41,736 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:57:41,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:57:41,747 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:57:41,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:57:48,283 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 89 for LOIs [2022-11-19 07:57:48,300 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 65 for LOIs [2022-11-19 07:57:49,111 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 79 for LOIs [2022-11-19 07:57:49,278 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2022-11-19 07:57:49,291 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-19 07:57:49,317 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 77 for LOIs [2022-11-19 07:57:49,650 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-19 07:57:49,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:58:04,361 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 [2022-11-19 07:58:04,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:58:04,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:04,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-11-19 07:58:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738834033] [2022-11-19 07:58:04,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:04,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:58:04,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:58:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2989, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:58:04,369 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) [2022-11-19 07:58:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:05,747 INFO L93 Difference]: Finished difference Result 1099 states and 1502 transitions. [2022-11-19 07:58:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:58:05,748 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 [2022-11-19 07:58:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:05,753 INFO L225 Difference]: With dead ends: 1099 [2022-11-19 07:58:05,753 INFO L226 Difference]: Without dead ends: 632 [2022-11-19 07:58:05,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 268 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=421, Invalid=4549, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 07:58:05,758 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 257 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:05,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1017 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:58:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-19 07:58:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 543. [2022-11-19 07:58:05,818 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) [2022-11-19 07:58:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 710 transitions. [2022-11-19 07:58:05,822 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 710 transitions. Word has length 106 [2022-11-19 07:58:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:05,823 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 710 transitions. [2022-11-19 07:58:05,823 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) [2022-11-19 07:58:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 710 transitions. [2022-11-19 07:58:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-19 07:58:05,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:05,827 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] [2022-11-19 07:58:05,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:06,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:58:06,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash 567515878, now seen corresponding path program 1 times [2022-11-19 07:58:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721732269] [2022-11-19 07:58:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:58:06,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721732269] [2022-11-19 07:58:06,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721732269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767602782] [2022-11-19 07:58:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:06,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:06,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:06,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:58:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:58:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:58:06,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:06,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767602782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:06,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:58:06,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-19 07:58:06,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436622830] [2022-11-19 07:58:06,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:06,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:58:06,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:58:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:58:06,536 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) [2022-11-19 07:58:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:06,678 INFO L93 Difference]: Finished difference Result 1222 states and 1618 transitions. [2022-11-19 07:58:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:06,679 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 [2022-11-19 07:58:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:06,684 INFO L225 Difference]: With dead ends: 1222 [2022-11-19 07:58:06,684 INFO L226 Difference]: Without dead ends: 714 [2022-11-19 07:58:06,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:58:06,687 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 [2022-11-19 07:58:06,688 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] [2022-11-19 07:58:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-19 07:58:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 697. [2022-11-19 07:58:06,761 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) [2022-11-19 07:58:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 913 transitions. [2022-11-19 07:58:06,766 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 913 transitions. Word has length 131 [2022-11-19 07:58:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:06,767 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 913 transitions. [2022-11-19 07:58:06,767 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) [2022-11-19 07:58:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 913 transitions. [2022-11-19 07:58:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-19 07:58:06,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:06,772 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] [2022-11-19 07:58:06,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:58:06,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1334016935, now seen corresponding path program 2 times [2022-11-19 07:58:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:06,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909816782] [2022-11-19 07:58:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:06,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:58:07,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:07,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909816782] [2022-11-19 07:58:07,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909816782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657184919] [2022-11-19 07:58:07,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:58:07,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:07,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:07,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:58:07,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:58:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:58:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:58:07,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-19 07:58:08,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657184919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500668950] [2022-11-19 07:58:08,149 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:58:08,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:08,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:58:08,150 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:58:08,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:58:18,299 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 84 for LOIs [2022-11-19 07:58:18,310 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 81 for LOIs [2022-11-19 07:58:19,225 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 80 for LOIs [2022-11-19 07:58:19,351 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 53 for LOIs [2022-11-19 07:58:19,361 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-19 07:58:19,383 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 78 for LOIs [2022-11-19 07:58:19,754 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 81 for LOIs [2022-11-19 07:58:19,773 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2022-11-19 07:58:19,779 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:58:40,859 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 [2022-11-19 07:58:40,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:58:40,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:40,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-19 07:58:40,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153348949] [2022-11-19 07:58:40,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:40,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:58:40,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:58:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=5660, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:58:40,864 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) [2022-11-19 07:58:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:47,922 INFO L93 Difference]: Finished difference Result 2312 states and 3143 transitions. [2022-11-19 07:58:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-19 07:58:47,931 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 [2022-11-19 07:58:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:47,942 INFO L225 Difference]: With dead ends: 2312 [2022-11-19 07:58:47,942 INFO L226 Difference]: Without dead ends: 1655 [2022-11-19 07:58:47,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 404 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10466 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1948, Invalid=23812, Unknown=0, NotChecked=0, Total=25760 [2022-11-19 07:58:47,959 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1686 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 1464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 5197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:47,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 2558 Invalid, 5197 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1464 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-19 07:58:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-19 07:58:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1104. [2022-11-19 07:58:48,125 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) [2022-11-19 07:58:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1436 transitions. [2022-11-19 07:58:48,136 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1436 transitions. Word has length 149 [2022-11-19 07:58:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:48,136 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1436 transitions. [2022-11-19 07:58:48,137 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) [2022-11-19 07:58:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1436 transitions. [2022-11-19 07:58:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:58:48,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:48,144 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] [2022-11-19 07:58:48,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:48,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:48,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:48,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1051969494, now seen corresponding path program 1 times [2022-11-19 07:58:48,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662375171] [2022-11-19 07:58:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 07:58:48,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:48,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662375171] [2022-11-19 07:58:48,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662375171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902085422] [2022-11-19 07:58:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:48,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:48,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:58:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:58:48,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:58:48,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:48,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902085422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:48,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:58:48,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:58:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019236061] [2022-11-19 07:58:48,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:58:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:58:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:58:48,670 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) [2022-11-19 07:58:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:48,967 INFO L93 Difference]: Finished difference Result 3011 states and 3984 transitions. [2022-11-19 07:58:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:48,968 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 [2022-11-19 07:58:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:48,982 INFO L225 Difference]: With dead ends: 3011 [2022-11-19 07:58:48,982 INFO L226 Difference]: Without dead ends: 1940 [2022-11-19 07:58:48,988 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 [2022-11-19 07:58:48,989 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:48,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 256 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-19 07:58:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1911. [2022-11-19 07:58:49,313 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) [2022-11-19 07:58:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2478 transitions. [2022-11-19 07:58:49,325 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2478 transitions. Word has length 141 [2022-11-19 07:58:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:49,326 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 2478 transitions. [2022-11-19 07:58:49,326 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) [2022-11-19 07:58:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2478 transitions. [2022-11-19 07:58:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:58:49,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:49,334 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] [2022-11-19 07:58:49,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:58:49,541 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -334588306, now seen corresponding path program 1 times [2022-11-19 07:58:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548595787] [2022-11-19 07:58:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 07:58:49,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548595787] [2022-11-19 07:58:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548595787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11341885] [2022-11-19 07:58:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:49,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:49,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:58:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:58:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:58:49,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:49,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11341885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:49,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:58:49,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:58:49,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024123750] [2022-11-19 07:58:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:58:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:58:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:58:49,925 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) [2022-11-19 07:58:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:50,398 INFO L93 Difference]: Finished difference Result 5373 states and 7275 transitions. [2022-11-19 07:58:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:50,399 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 [2022-11-19 07:58:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:50,463 INFO L225 Difference]: With dead ends: 5373 [2022-11-19 07:58:50,463 INFO L226 Difference]: Without dead ends: 3480 [2022-11-19 07:58:50,471 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 [2022-11-19 07:58:50,472 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 [2022-11-19 07:58:50,472 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] [2022-11-19 07:58:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-11-19 07:58:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3460. [2022-11-19 07:58:50,934 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) [2022-11-19 07:58:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 4577 transitions. [2022-11-19 07:58:50,953 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 4577 transitions. Word has length 141 [2022-11-19 07:58:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:50,954 INFO L495 AbstractCegarLoop]: Abstraction has 3460 states and 4577 transitions. [2022-11-19 07:58:50,954 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) [2022-11-19 07:58:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 4577 transitions. [2022-11-19 07:58:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:58:50,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:50,966 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] [2022-11-19 07:58:50,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:51,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:51,173 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash 423489579, now seen corresponding path program 1 times [2022-11-19 07:58:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731262552] [2022-11-19 07:58:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:58:51,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:51,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731262552] [2022-11-19 07:58:51,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731262552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910020809] [2022-11-19 07:58:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:51,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:51,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:51,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:51,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:58:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:58:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:58:51,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:51,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910020809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:51,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:58:51,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:58:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659811593] [2022-11-19 07:58:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:51,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:58:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:58:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:58:51,521 INFO L87 Difference]: Start difference. First operand 3460 states and 4577 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) [2022-11-19 07:58:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:51,998 INFO L93 Difference]: Finished difference Result 5335 states and 6995 transitions. [2022-11-19 07:58:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:51,999 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 [2022-11-19 07:58:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:52,020 INFO L225 Difference]: With dead ends: 5335 [2022-11-19 07:58:52,020 INFO L226 Difference]: Without dead ends: 3624 [2022-11-19 07:58:52,028 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 [2022-11-19 07:58:52,029 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:52,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 304 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2022-11-19 07:58:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3507. [2022-11-19 07:58:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 2353 states have (on average 1.246068848278793) internal successors, (2932), 2607 states have internal predecessors, (2932), 595 states have call successors, (595), 514 states have call predecessors, (595), 558 states have return successors, (959), 577 states have call predecessors, (959), 595 states have call successors, (959) [2022-11-19 07:58:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 4486 transitions. [2022-11-19 07:58:52,556 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 4486 transitions. Word has length 143 [2022-11-19 07:58:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:52,556 INFO L495 AbstractCegarLoop]: Abstraction has 3507 states and 4486 transitions. [2022-11-19 07:58:52,556 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) [2022-11-19 07:58:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 4486 transitions. [2022-11-19 07:58:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:58:52,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:52,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:52,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:58:52,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1212367357, now seen corresponding path program 1 times [2022-11-19 07:58:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:52,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959414488] [2022-11-19 07:58:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-19 07:58:52,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:52,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959414488] [2022-11-19 07:58:52,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959414488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:52,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:58:52,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:58:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587412967] [2022-11-19 07:58:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:52,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:58:52,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:58:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:58:52,957 INFO L87 Difference]: Start difference. First operand 3507 states and 4486 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-11-19 07:58:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:54,290 INFO L93 Difference]: Finished difference Result 8823 states and 11363 transitions. [2022-11-19 07:58:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:58:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 143 [2022-11-19 07:58:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:54,335 INFO L225 Difference]: With dead ends: 8823 [2022-11-19 07:58:54,335 INFO L226 Difference]: Without dead ends: 6694 [2022-11-19 07:58:54,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:58:54,351 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 218 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:54,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 701 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:58:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2022-11-19 07:58:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6655. [2022-11-19 07:58:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 4481 states have (on average 1.2468199062709218) internal successors, (5587), 4943 states have internal predecessors, (5587), 1117 states have call successors, (1117), 982 states have call predecessors, (1117), 1056 states have return successors, (1788), 1085 states have call predecessors, (1788), 1117 states have call successors, (1788) [2022-11-19 07:58:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 8492 transitions. [2022-11-19 07:58:55,469 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 8492 transitions. Word has length 143 [2022-11-19 07:58:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:55,469 INFO L495 AbstractCegarLoop]: Abstraction has 6655 states and 8492 transitions. [2022-11-19 07:58:55,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-11-19 07:58:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 8492 transitions. [2022-11-19 07:58:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:58:55,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:55,493 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:55,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:58:55,493 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash -397506819, now seen corresponding path program 1 times [2022-11-19 07:58:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:55,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914875450] [2022-11-19 07:58:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-19 07:58:55,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914875450] [2022-11-19 07:58:55,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914875450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998097634] [2022-11-19 07:58:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:55,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:55,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:55,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:58:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:58:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-19 07:58:55,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:55,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998097634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:55,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:58:55,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2022-11-19 07:58:55,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585794971] [2022-11-19 07:58:55,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:55,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:58:55,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:58:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:58:55,873 INFO L87 Difference]: Start difference. First operand 6655 states and 8492 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-19 07:58:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:56,906 INFO L93 Difference]: Finished difference Result 9947 states and 12534 transitions. [2022-11-19 07:58:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-19 07:58:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:56,945 INFO L225 Difference]: With dead ends: 9947 [2022-11-19 07:58:56,945 INFO L226 Difference]: Without dead ends: 6657 [2022-11-19 07:58:56,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:58:56,960 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 53 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:56,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-11-19 07:58:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 5499. [2022-11-19 07:58:57,840 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) [2022-11-19 07:58:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6829 transitions. [2022-11-19 07:58:57,860 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6829 transitions. Word has length 146 [2022-11-19 07:58:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:57,862 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 6829 transitions. [2022-11-19 07:58:57,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-19 07:58:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6829 transitions. [2022-11-19 07:58:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 07:58:57,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:57,881 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] [2022-11-19 07:58:57,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:58,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:58:58,088 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 766411790, now seen corresponding path program 1 times [2022-11-19 07:58:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:58,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006571326] [2022-11-19 07:58:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 07:58:59,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006571326] [2022-11-19 07:58:59,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006571326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964185025] [2022-11-19 07:58:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:59,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:59,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:59,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:59,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:58:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:58:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:59:00,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:59:02,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964185025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:02,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569329446] [2022-11-19 07:59:02,126 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-19 07:59:02,126 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:59:02,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:59:02,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:59:02,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:59:08,280 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 85 for LOIs [2022-11-19 07:59:08,293 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 65 for LOIs [2022-11-19 07:59:09,131 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 84 for LOIs [2022-11-19 07:59:09,623 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 74 for LOIs [2022-11-19 07:59:09,633 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-19 07:59:09,647 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 81 for LOIs [2022-11-19 07:59:09,899 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 85 for LOIs [2022-11-19 07:59:09,910 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 87 for LOIs [2022-11-19 07:59:09,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:59:29,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103491#(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 [2022-11-19 07:59:29,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:59:29,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:59:29,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 11] total 35 [2022-11-19 07:59:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099589656] [2022-11-19 07:59:29,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:59:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:59:29,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:59:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=6875, Unknown=0, NotChecked=0, Total=7656 [2022-11-19 07:59:29,222 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) [2022-11-19 07:59:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:37,848 INFO L93 Difference]: Finished difference Result 14935 states and 19704 transitions. [2022-11-19 07:59:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-19 07:59:37,850 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 [2022-11-19 07:59:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:37,919 INFO L225 Difference]: With dead ends: 14935 [2022-11-19 07:59:37,919 INFO L226 Difference]: Without dead ends: 12106 [2022-11-19 07:59:37,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 390 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10142 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=1831, Invalid=19925, Unknown=0, NotChecked=0, Total=21756 [2022-11-19 07:59:37,940 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 3860 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 4177 mSolverCounterSat, 2489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3860 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 6666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2489 IncrementalHoareTripleChecker+Valid, 4177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:37,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3860 Valid, 1433 Invalid, 6666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2489 Valid, 4177 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-19 07:59:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2022-11-19 07:59:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 8228. [2022-11-19 07:59:39,130 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) [2022-11-19 07:59:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 10137 transitions. [2022-11-19 07:59:39,159 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 10137 transitions. Word has length 145 [2022-11-19 07:59:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:39,160 INFO L495 AbstractCegarLoop]: Abstraction has 8228 states and 10137 transitions. [2022-11-19 07:59:39,160 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) [2022-11-19 07:59:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 10137 transitions. [2022-11-19 07:59:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-19 07:59:39,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:39,187 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] [2022-11-19 07:59:39,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:39,395 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:59:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215503, now seen corresponding path program 1 times [2022-11-19 07:59:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506030847] [2022-11-19 07:59:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-19 07:59:39,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506030847] [2022-11-19 07:59:39,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506030847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:59:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807629871] [2022-11-19 07:59:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:39,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:39,514 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:59:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:59:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 07:59:39,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:59:39,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807629871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:39,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:59:39,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:59:39,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813972951] [2022-11-19 07:59:39,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:39,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:59:39,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:59:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:59:39,755 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) [2022-11-19 07:59:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:41,013 INFO L93 Difference]: Finished difference Result 17695 states and 22202 transitions. [2022-11-19 07:59:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:41,023 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 [2022-11-19 07:59:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:41,075 INFO L225 Difference]: With dead ends: 17695 [2022-11-19 07:59:41,075 INFO L226 Difference]: Without dead ends: 9795 [2022-11-19 07:59:41,102 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 [2022-11-19 07:59:41,103 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 [2022-11-19 07:59:41,104 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] [2022-11-19 07:59:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2022-11-19 07:59:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 9747. [2022-11-19 07:59:42,425 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) [2022-11-19 07:59:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 12046 transitions. [2022-11-19 07:59:42,460 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 12046 transitions. Word has length 175 [2022-11-19 07:59:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:42,461 INFO L495 AbstractCegarLoop]: Abstraction has 9747 states and 12046 transitions. [2022-11-19 07:59:42,461 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) [2022-11-19 07:59:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 12046 transitions. [2022-11-19 07:59:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-19 07:59:42,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:42,608 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] [2022-11-19 07:59:42,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:59:42,815 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:59:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 870997424, now seen corresponding path program 1 times [2022-11-19 07:59:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775351914] [2022-11-19 07:59:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 84 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-19 07:59:44,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775351914] [2022-11-19 07:59:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775351914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:59:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094331577] [2022-11-19 07:59:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:44,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:44,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:44,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:44,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:59:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:59:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 60 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 07:59:45,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-19 07:59:47,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094331577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501851121] [2022-11-19 07:59:47,754 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 07:59:47,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:59:47,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:59:47,757 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:59:47,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:59:58,019 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 80 for LOIs [2022-11-19 07:59:58,029 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 59 for LOIs [2022-11-19 07:59:58,452 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 58 for LOIs [2022-11-19 07:59:58,514 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-19 07:59:58,518 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-19 07:59:58,533 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 56 for LOIs [2022-11-19 07:59:58,814 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-19 07:59:58,819 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 58 for LOIs [2022-11-19 07:59:58,823 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 81 for LOIs [2022-11-19 07:59:58,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:21,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '182169#(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 [2022-11-19 08:00:21,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:21,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:00:21,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 40 [2022-11-19 08:00:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520996098] [2022-11-19 08:00:21,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-19 08:00:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-19 08:00:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=9263, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 08:00:21,585 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) [2022-11-19 08:00:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:29,875 INFO L93 Difference]: Finished difference Result 18229 states and 22391 transitions. [2022-11-19 08:00:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 08:00:29,875 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 [2022-11-19 08:00:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:29,914 INFO L225 Difference]: With dead ends: 18229 [2022-11-19 08:00:29,915 INFO L226 Difference]: Without dead ends: 9940 [2022-11-19 08:00:29,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 475 SyntacticMatches, 11 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9602 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=1810, Invalid=20242, Unknown=0, NotChecked=0, Total=22052 [2022-11-19 08:00:29,937 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 2503 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 4787 mSolverCounterSat, 1728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2510 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1728 IncrementalHoareTripleChecker+Valid, 4787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:29,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2510 Valid, 2252 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1728 Valid, 4787 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 08:00:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-11-19 08:00:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9772. [2022-11-19 08:00:31,241 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) [2022-11-19 08:00:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 11821 transitions. [2022-11-19 08:00:31,269 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 11821 transitions. Word has length 178 [2022-11-19 08:00:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:31,270 INFO L495 AbstractCegarLoop]: Abstraction has 9772 states and 11821 transitions. [2022-11-19 08:00:31,270 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) [2022-11-19 08:00:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 11821 transitions. [2022-11-19 08:00:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-19 08:00:31,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:31,297 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] [2022-11-19 08:00:31,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:31,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:00:31,502 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -633347556, now seen corresponding path program 1 times [2022-11-19 08:00:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:31,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329093721] [2022-11-19 08:00:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 29 proven. 126 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 08:00:33,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329093721] [2022-11-19 08:00:33,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329093721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59138550] [2022-11-19 08:00:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:33,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:33,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:33,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:33,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:00:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 08:00:33,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 153 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:00:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-19 08:00:37,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59138550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:37,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584916674] [2022-11-19 08:00:37,278 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 08:00:37,279 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:37,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:37,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:37,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:41,516 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 83 for LOIs [2022-11-19 08:00:41,533 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 64 for LOIs [2022-11-19 08:00:41,967 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 79 for LOIs [2022-11-19 08:00:42,488 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 72 for LOIs [2022-11-19 08:00:42,497 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-19 08:00:42,510 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 85 for LOIs [2022-11-19 08:00:42,922 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 84 for LOIs [2022-11-19 08:00:42,932 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 84 for LOIs [2022-11-19 08:00:42,949 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 87 for LOIs [2022-11-19 08:00:42,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:04,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226100#(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 [2022-11-19 08:01:04,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:01:04,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:01:04,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 48 [2022-11-19 08:01:04,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049814366] [2022-11-19 08:01:04,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:04,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 08:01:04,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 08:01:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=10090, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 08:01:04,375 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) [2022-11-19 08:01:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:18,692 INFO L93 Difference]: Finished difference Result 23383 states and 29660 transitions. [2022-11-19 08:01:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 08:01:18,693 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 [2022-11-19 08:01:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:18,763 INFO L225 Difference]: With dead ends: 23383 [2022-11-19 08:01:18,763 INFO L226 Difference]: Without dead ends: 15667 [2022-11-19 08:01:18,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 532 SyntacticMatches, 18 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17158 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=3021, Invalid=34421, Unknown=0, NotChecked=0, Total=37442 [2022-11-19 08:01:18,795 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 4931 mSDsluCounter, 3741 mSDsCounter, 0 mSdLazyCounter, 9435 mSolverCounterSat, 3527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4938 SdHoareTripleChecker+Valid, 4000 SdHoareTripleChecker+Invalid, 12962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3527 IncrementalHoareTripleChecker+Valid, 9435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:18,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4938 Valid, 4000 Invalid, 12962 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3527 Valid, 9435 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-19 08:01:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15667 states. [2022-11-19 08:01:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15667 to 11874. [2022-11-19 08:01:20,773 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) [2022-11-19 08:01:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 14436 transitions. [2022-11-19 08:01:20,807 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 14436 transitions. Word has length 190 [2022-11-19 08:01:20,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:20,808 INFO L495 AbstractCegarLoop]: Abstraction has 11874 states and 14436 transitions. [2022-11-19 08:01:20,808 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) [2022-11-19 08:01:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 14436 transitions. [2022-11-19 08:01:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-19 08:01:20,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:20,833 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] [2022-11-19 08:01:20,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 08:01:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:01:21,039 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash 231449596, now seen corresponding path program 2 times [2022-11-19 08:01:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:21,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567005754] [2022-11-19 08:01:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-19 08:01:23,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567005754] [2022-11-19 08:01:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567005754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828337401] [2022-11-19 08:01:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:01:23,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:23,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:23,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:01:23,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:01:23,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-19 08:01:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 149 proven. 149 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:01:24,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 133 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-19 08:01:27,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828337401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113695633] [2022-11-19 08:01:27,809 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 08:01:27,809 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:27,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:27,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:27,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:38,543 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 60 for LOIs [2022-11-19 08:01:38,548 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 59 for LOIs [2022-11-19 08:01:38,902 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 58 for LOIs [2022-11-19 08:01:38,959 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 50 for LOIs [2022-11-19 08:01:38,961 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 86 for LOIs [2022-11-19 08:01:38,974 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 56 for LOIs [2022-11-19 08:01:39,223 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 61 for LOIs [2022-11-19 08:01:39,228 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 58 for LOIs [2022-11-19 08:01:39,232 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 81 for LOIs [2022-11-19 08:01:39,242 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:01,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '281265#(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 [2022-11-19 08:02:01,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:02:01,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:01,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 25] total 71 [2022-11-19 08:02:01,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175930449] [2022-11-19 08:02:01,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:01,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-19 08:02:01,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-19 08:02:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1754, Invalid=15538, Unknown=0, NotChecked=0, Total=17292 [2022-11-19 08:02:01,209 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) [2022-11-19 08:02:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:13,764 INFO L93 Difference]: Finished difference Result 21672 states and 26499 transitions. [2022-11-19 08:02:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-19 08:02:13,765 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 [2022-11-19 08:02:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:13,771 INFO L225 Difference]: With dead ends: 21672 [2022-11-19 08:02:13,771 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 08:02:13,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 590 SyntacticMatches, 11 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22179 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=6630, Invalid=47426, Unknown=0, NotChecked=0, Total=54056 [2022-11-19 08:02:13,812 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 6013 mSDsluCounter, 3239 mSDsCounter, 0 mSdLazyCounter, 6843 mSolverCounterSat, 4139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6013 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 10982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4139 IncrementalHoareTripleChecker+Valid, 6843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:13,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6013 Valid, 3511 Invalid, 10982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4139 Valid, 6843 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 08:02:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 08:02:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 08:02:13,814 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) [2022-11-19 08:02:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 08:02:13,816 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2022-11-19 08:02:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:13,817 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 08:02:13,817 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) [2022-11-19 08:02:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 08:02:13,817 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 08:02:13,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:02:13,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:14,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b46d71b3-4bc6-4ee8-a93c-30a25f05b7d1/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:14,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 08:03:30,902 WARN L233 SmtUtils]: Spent 30.71s 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) [2022-11-19 08:04:19,035 WARN L233 SmtUtils]: Spent 45.93s 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) [2022-11-19 08:05:44,596 WARN L233 SmtUtils]: Spent 55.88s 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) [2022-11-19 08:07:42,636 WARN L233 SmtUtils]: Spent 1.95m on a formula simplification. DAG size of input: 1584 DAG size of output: 1361 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-19 08:07:58,371 WARN L233 SmtUtils]: Spent 12.52s 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) [2022-11-19 08:08:39,457 WARN L233 SmtUtils]: Spent 36.85s on a formula simplification. DAG size of input: 1123 DAG size of output: 969 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-19 08:09:00,198 WARN L233 SmtUtils]: Spent 17.56s on a formula simplification. DAG size of input: 1078 DAG size of output: 73 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 08:09:19,333 WARN L233 SmtUtils]: Spent 19.03s on a formula simplification. DAG size of input: 1129 DAG size of output: 96 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 08:10:03,534 WARN L233 SmtUtils]: Spent 43.99s on a formula simplification. DAG size of input: 2068 DAG size of output: 134 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 08:10:36,044 WARN L233 SmtUtils]: Spent 22.73s on a formula simplification. DAG size of input: 1173 DAG size of output: 92 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 08:11:19,876 WARN L233 SmtUtils]: Spent 43.71s on a formula simplification. DAG size of input: 2068 DAG size of output: 134 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)