./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f3f23173af8ffbfd6ca2d826b937f078be2c112e64596739bc9740bb061a5d2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:48:24,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:48:24,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:48:25,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:48:25,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:48:25,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:48:25,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:48:25,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:48:25,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:48:25,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:48:25,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:48:25,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:48:25,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:48:25,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:48:25,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:48:25,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:48:25,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:48:25,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:48:25,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:48:25,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:48:25,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:48:25,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:48:25,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:48:25,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:48:25,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:48:25,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:48:25,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:48:25,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:48:25,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:48:25,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:48:25,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:48:25,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:48:25,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:48:25,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:48:25,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:48:25,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:48:25,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:48:25,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:48:25,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:48:25,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:48:25,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:48:25,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:48:25,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:48:25,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:48:25,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:48:25,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:48:25,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:48:25,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:48:25,141 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:48:25,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:48:25,142 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:48:25,142 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:48:25,143 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:48:25,143 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:48:25,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:48:25,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:48:25,144 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:48:25,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:48:25,144 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:48:25,145 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:48:25,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:48:25,146 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:48:25,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:48:25,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:48:25,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:48:25,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:48:25,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:48:25,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:48:25,147 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:48:25,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:48:25,148 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:48:25,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:48:25,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:48:25,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:48:25,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:48:25,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:48:25,149 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:48:25,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:48:25,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:48:25,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:48:25,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:48:25,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:48:25,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:48:25,151 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_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f3f23173af8ffbfd6ca2d826b937f078be2c112e64596739bc9740bb061a5d2 [2022-11-23 13:48:25,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:48:25,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:48:25,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:48:25,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:48:25,491 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:48:25,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c [2022-11-23 13:48:28,674 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:48:29,003 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:48:29,004 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c [2022-11-23 13:48:29,038 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/data/5c89d9dd0/cc7377da481a4f8ca1e4b208d33eab8c/FLAG5ed0d7d71 [2022-11-23 13:48:29,054 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/data/5c89d9dd0/cc7377da481a4f8ca1e4b208d33eab8c [2022-11-23 13:48:29,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:48:29,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:48:29,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:48:29,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:48:29,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:48:29,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26701b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29, skipping insertion in model container [2022-11-23 13:48:29,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:48:29,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:48:29,344 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c[2897,2910] [2022-11-23 13:48:29,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:48:29,495 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:48:29,529 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c[2897,2910] [2022-11-23 13:48:29,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:48:29,613 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:48:29,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29 WrapperNode [2022-11-23 13:48:29,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:48:29,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:48:29,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:48:29,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:48:29,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,666 INFO L138 Inliner]: procedures = 59, calls = 107, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 241 [2022-11-23 13:48:29,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:48:29,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:48:29,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:48:29,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:48:29,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:48:29,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:48:29,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:48:29,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:48:29,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (1/1) ... [2022-11-23 13:48:29,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:48:29,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:29,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:48:29,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:48:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:48:29,856 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-23 13:48:29,857 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-23 13:48:29,857 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 13:48:29,857 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 13:48:29,857 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 13:48:29,858 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 13:48:29,858 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-11-23 13:48:29,858 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-11-23 13:48:29,858 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-23 13:48:29,858 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-23 13:48:29,858 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2022-11-23 13:48:29,859 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2022-11-23 13:48:29,859 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-23 13:48:29,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-23 13:48:29,859 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-23 13:48:29,859 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-23 13:48:29,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:48:29,860 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-23 13:48:29,860 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-23 13:48:29,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:48:29,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:48:29,975 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:48:29,977 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:48:30,404 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:48:30,546 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:48:30,552 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 13:48:30,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:30 BoogieIcfgContainer [2022-11-23 13:48:30,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:48:30,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:48:30,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:48:30,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:48:30,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:48:29" (1/3) ... [2022-11-23 13:48:30,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf796db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:30, skipping insertion in model container [2022-11-23 13:48:30,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:29" (2/3) ... [2022-11-23 13:48:30,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf796db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:30, skipping insertion in model container [2022-11-23 13:48:30,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:30" (3/3) ... [2022-11-23 13:48:30,571 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product64.cil.c [2022-11-23 13:48:30,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:48:30,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:48:30,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:48:30,672 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;@1929542, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:48:30,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:48:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 13:48:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:48:30,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:30,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:30,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 758216112, now seen corresponding path program 1 times [2022-11-23 13:48:30,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:30,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619156057] [2022-11-23 13:48:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:30,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:30,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619156057] [2022-11-23 13:48:30,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619156057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:30,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:30,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:48:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706608793] [2022-11-23 13:48:30,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:30,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 13:48:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 13:48:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:48:31,006 INFO L87 Difference]: Start difference. First operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:31,134 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2022-11-23 13:48:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 13:48:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:48:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:31,150 INFO L225 Difference]: With dead ends: 144 [2022-11-23 13:48:31,150 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 13:48:31,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:48:31,161 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:31,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 13:48:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-23 13:48:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 52 states have internal predecessors, (57), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 13:48:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-11-23 13:48:31,234 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 12 [2022-11-23 13:48:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:31,235 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-11-23 13:48:31,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-11-23 13:48:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:48:31,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:31,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:31,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:48:31,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1790501731, now seen corresponding path program 1 times [2022-11-23 13:48:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:31,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005173635] [2022-11-23 13:48:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:31,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:31,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005173635] [2022-11-23 13:48:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005173635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:31,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:31,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477114256] [2022-11-23 13:48:31,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:31,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:31,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:31,399 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:31,470 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-11-23 13:48:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:48:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:31,472 INFO L225 Difference]: With dead ends: 108 [2022-11-23 13:48:31,472 INFO L226 Difference]: Without dead ends: 60 [2022-11-23 13:48:31,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:31,474 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:31,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 110 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:48:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-23 13:48:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-23 13:48:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 47 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 13:48:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2022-11-23 13:48:31,486 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 13 [2022-11-23 13:48:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:31,486 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2022-11-23 13:48:31,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2022-11-23 13:48:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 13:48:31,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:31,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:48:31,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash -760101963, now seen corresponding path program 1 times [2022-11-23 13:48:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:31,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036417550] [2022-11-23 13:48:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:31,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036417550] [2022-11-23 13:48:31,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036417550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:31,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:31,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:48:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593787571] [2022-11-23 13:48:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:48:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:48:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:48:31,691 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:31,868 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2022-11-23 13:48:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:48:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 13:48:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:31,873 INFO L225 Difference]: With dead ends: 147 [2022-11-23 13:48:31,873 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 13:48:31,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:31,878 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 102 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:31,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 141 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 13:48:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-11-23 13:48:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 68 states have internal predecessors, (76), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (19), 12 states have call predecessors, (19), 18 states have call successors, (19) [2022-11-23 13:48:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2022-11-23 13:48:31,906 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 16 [2022-11-23 13:48:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:31,907 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2022-11-23 13:48:31,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2022-11-23 13:48:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 13:48:31,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:31,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:48:31,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1260589856, now seen corresponding path program 1 times [2022-11-23 13:48:31,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:31,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700706712] [2022-11-23 13:48:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:32,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:32,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700706712] [2022-11-23 13:48:32,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700706712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:32,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:32,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110895119] [2022-11-23 13:48:32,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:48:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:48:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:48:32,053 INFO L87 Difference]: Start difference. First operand 86 states and 113 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:32,201 INFO L93 Difference]: Finished difference Result 210 states and 287 transitions. [2022-11-23 13:48:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:48:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 13:48:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:32,207 INFO L225 Difference]: With dead ends: 210 [2022-11-23 13:48:32,207 INFO L226 Difference]: Without dead ends: 126 [2022-11-23 13:48:32,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:32,209 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 45 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:32,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-23 13:48:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2022-11-23 13:48:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.3) internal successors, (104), 91 states have internal predecessors, (104), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-23 13:48:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 152 transitions. [2022-11-23 13:48:32,256 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 152 transitions. Word has length 19 [2022-11-23 13:48:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:32,256 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 152 transitions. [2022-11-23 13:48:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 152 transitions. [2022-11-23 13:48:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 13:48:32,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:32,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:48:32,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash 291838580, now seen corresponding path program 1 times [2022-11-23 13:48:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:32,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532648565] [2022-11-23 13:48:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:32,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:32,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532648565] [2022-11-23 13:48:32,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532648565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:32,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:32,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:48:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365851066] [2022-11-23 13:48:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:32,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:48:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:48:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:32,466 INFO L87 Difference]: Start difference. First operand 119 states and 152 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:48:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:32,631 INFO L93 Difference]: Finished difference Result 351 states and 455 transitions. [2022-11-23 13:48:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:48:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-11-23 13:48:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:32,634 INFO L225 Difference]: With dead ends: 351 [2022-11-23 13:48:32,634 INFO L226 Difference]: Without dead ends: 234 [2022-11-23 13:48:32,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:32,637 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 102 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:32,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 217 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-23 13:48:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 204. [2022-11-23 13:48:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 140 states have (on average 1.2785714285714285) internal successors, (179), 156 states have internal predecessors, (179), 31 states have call successors, (31), 29 states have call predecessors, (31), 32 states have return successors, (44), 31 states have call predecessors, (44), 31 states have call successors, (44) [2022-11-23 13:48:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 254 transitions. [2022-11-23 13:48:32,670 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 254 transitions. Word has length 33 [2022-11-23 13:48:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:32,670 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 254 transitions. [2022-11-23 13:48:32,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:48:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 254 transitions. [2022-11-23 13:48:32,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 13:48:32,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:32,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:32,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:48:32,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1444504193, now seen corresponding path program 1 times [2022-11-23 13:48:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:32,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328516203] [2022-11-23 13:48:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:32,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:33,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:33,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328516203] [2022-11-23 13:48:33,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328516203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:33,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:33,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:48:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144367991] [2022-11-23 13:48:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:33,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:48:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:33,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:48:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:48:33,008 INFO L87 Difference]: Start difference. First operand 204 states and 254 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:48:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:33,550 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2022-11-23 13:48:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 13:48:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2022-11-23 13:48:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:33,556 INFO L225 Difference]: With dead ends: 456 [2022-11-23 13:48:33,557 INFO L226 Difference]: Without dead ends: 339 [2022-11-23 13:48:33,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:48:33,562 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 252 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:33,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 304 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:48:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-23 13:48:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2022-11-23 13:48:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 217 states have (on average 1.271889400921659) internal successors, (276), 243 states have internal predecessors, (276), 49 states have call successors, (49), 43 states have call predecessors, (49), 50 states have return successors, (70), 50 states have call predecessors, (70), 49 states have call successors, (70) [2022-11-23 13:48:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 395 transitions. [2022-11-23 13:48:33,650 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 395 transitions. Word has length 36 [2022-11-23 13:48:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:33,650 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 395 transitions. [2022-11-23 13:48:33,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:48:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 395 transitions. [2022-11-23 13:48:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 13:48:33,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:33,658 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:48:33,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:48:33,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1437657817, now seen corresponding path program 1 times [2022-11-23 13:48:33,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:33,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675335975] [2022-11-23 13:48:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:33,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:48:34,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675335975] [2022-11-23 13:48:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675335975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:34,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347121985] [2022-11-23 13:48:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:34,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:34,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:34,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:34,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:48:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:48:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 13:48:35,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347121985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:48:35,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054292718] [2022-11-23 13:48:35,463 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 13:48:35,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:48:35,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:48:35,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:48:35,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:48:38,246 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 48 for LOIs [2022-11-23 13:48:38,257 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2022-11-23 13:48:38,392 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 24 for LOIs [2022-11-23 13:48:38,469 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 24 for LOIs [2022-11-23 13:48:38,610 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2022-11-23 13:48:38,613 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:48:43,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1054292718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:43,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:48:43,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [13, 11, 10] total 53 [2022-11-23 13:48:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130531492] [2022-11-23 13:48:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 13:48:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 13:48:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2361, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 13:48:43,577 INFO L87 Difference]: Start difference. First operand 317 states and 395 transitions. Second operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 13:48:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:53,021 INFO L93 Difference]: Finished difference Result 873 states and 1146 transitions. [2022-11-23 13:48:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-23 13:48:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 67 [2022-11-23 13:48:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:53,029 INFO L225 Difference]: With dead ends: 873 [2022-11-23 13:48:53,035 INFO L226 Difference]: Without dead ends: 612 [2022-11-23 13:48:53,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 156 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1147, Invalid=5825, Unknown=0, NotChecked=0, Total=6972 [2022-11-23 13:48:53,038 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 308 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:53,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 644 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 13:48:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-23 13:48:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 525. [2022-11-23 13:48:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 367 states have (on average 1.2724795640326976) internal successors, (467), 401 states have internal predecessors, (467), 79 states have call successors, (79), 66 states have call predecessors, (79), 78 states have return successors, (122), 82 states have call predecessors, (122), 79 states have call successors, (122) [2022-11-23 13:48:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 668 transitions. [2022-11-23 13:48:53,162 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 668 transitions. Word has length 67 [2022-11-23 13:48:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:53,162 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 668 transitions. [2022-11-23 13:48:53,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 13:48:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 668 transitions. [2022-11-23 13:48:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 13:48:53,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:53,165 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:53,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 13:48:53,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 13:48:53,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1125534688, now seen corresponding path program 1 times [2022-11-23 13:48:53,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539672360] [2022-11-23 13:48:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:53,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:48:53,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539672360] [2022-11-23 13:48:53,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539672360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:53,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:53,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:48:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866171679] [2022-11-23 13:48:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:53,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:48:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:48:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:53,451 INFO L87 Difference]: Start difference. First operand 525 states and 668 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:48:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:53,689 INFO L93 Difference]: Finished difference Result 821 states and 1058 transitions. [2022-11-23 13:48:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:48:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 75 [2022-11-23 13:48:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:53,692 INFO L225 Difference]: With dead ends: 821 [2022-11-23 13:48:53,693 INFO L226 Difference]: Without dead ends: 569 [2022-11-23 13:48:53,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:53,695 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 100 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:53,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 188 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-23 13:48:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2022-11-23 13:48:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 399 states have (on average 1.255639097744361) internal successors, (501), 432 states have internal predecessors, (501), 80 states have call successors, (80), 70 states have call predecessors, (80), 87 states have return successors, (118), 89 states have call predecessors, (118), 80 states have call successors, (118) [2022-11-23 13:48:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 699 transitions. [2022-11-23 13:48:53,779 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 699 transitions. Word has length 75 [2022-11-23 13:48:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:53,779 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 699 transitions. [2022-11-23 13:48:53,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:48:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 699 transitions. [2022-11-23 13:48:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 13:48:53,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:53,782 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:48:53,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:48:53,782 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash -216031854, now seen corresponding path program 1 times [2022-11-23 13:48:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:53,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569739540] [2022-11-23 13:48:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:48:53,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569739540] [2022-11-23 13:48:53,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569739540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:53,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:53,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:53,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455893843] [2022-11-23 13:48:53,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:53,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:53,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:53,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:53,824 INFO L87 Difference]: Start difference. First operand 567 states and 699 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 13:48:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:53,962 INFO L93 Difference]: Finished difference Result 937 states and 1153 transitions. [2022-11-23 13:48:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-11-23 13:48:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:53,966 INFO L225 Difference]: With dead ends: 937 [2022-11-23 13:48:53,966 INFO L226 Difference]: Without dead ends: 573 [2022-11-23 13:48:53,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:53,968 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:53,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:48:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-23 13:48:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 567. [2022-11-23 13:48:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 399 states have (on average 1.2481203007518797) internal successors, (498), 432 states have internal predecessors, (498), 80 states have call successors, (80), 70 states have call predecessors, (80), 87 states have return successors, (112), 89 states have call predecessors, (112), 80 states have call successors, (112) [2022-11-23 13:48:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 690 transitions. [2022-11-23 13:48:54,053 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 690 transitions. Word has length 70 [2022-11-23 13:48:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:54,054 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 690 transitions. [2022-11-23 13:48:54,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 13:48:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 690 transitions. [2022-11-23 13:48:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 13:48:54,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:54,056 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:48:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:48:54,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash -893805270, now seen corresponding path program 1 times [2022-11-23 13:48:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:54,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908075153] [2022-11-23 13:48:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 13:48:54,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:54,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908075153] [2022-11-23 13:48:54,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908075153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:54,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255086214] [2022-11-23 13:48:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:54,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:54,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:54,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:48:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 13:48:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:48:54,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:48:55,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255086214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:48:55,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352569243] [2022-11-23 13:48:55,434 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-23 13:48:55,435 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:48:55,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:48:55,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:48:55,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:48:58,081 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-23 13:48:58,101 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-23 13:48:58,176 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 24 for LOIs [2022-11-23 13:48:58,223 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 24 for LOIs [2022-11-23 13:48:58,317 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2022-11-23 13:48:58,319 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 41 for LOIs [2022-11-23 13:48:58,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:49:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [352569243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:05,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:49:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [12, 10, 11] total 54 [2022-11-23 13:49:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116837829] [2022-11-23 13:49:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:05,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 13:49:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 13:49:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2616, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 13:49:05,139 INFO L87 Difference]: Start difference. First operand 567 states and 690 transitions. Second operand has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:49:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:35,467 INFO L93 Difference]: Finished difference Result 1693 states and 2287 transitions. [2022-11-23 13:49:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-23 13:49:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 70 [2022-11-23 13:49:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:35,476 INFO L225 Difference]: With dead ends: 1693 [2022-11-23 13:49:35,476 INFO L226 Difference]: Without dead ends: 1414 [2022-11-23 13:49:35,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 163 SyntacticMatches, 12 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=1550, Invalid=12730, Unknown=0, NotChecked=0, Total=14280 [2022-11-23 13:49:35,481 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 411 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 4458 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 4458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:35,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1069 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 4458 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 13:49:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-11-23 13:49:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 897. [2022-11-23 13:49:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 624 states have (on average 1.2451923076923077) internal successors, (777), 677 states have internal predecessors, (777), 131 states have call successors, (131), 112 states have call predecessors, (131), 141 states have return successors, (188), 143 states have call predecessors, (188), 131 states have call successors, (188) [2022-11-23 13:49:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1096 transitions. [2022-11-23 13:49:35,762 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1096 transitions. Word has length 70 [2022-11-23 13:49:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:35,763 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1096 transitions. [2022-11-23 13:49:35,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:49:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1096 transitions. [2022-11-23 13:49:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 13:49:35,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:35,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:35,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 13:49:35,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 13:49:35,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:35,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1581910990, now seen corresponding path program 1 times [2022-11-23 13:49:35,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:35,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375862437] [2022-11-23 13:49:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:35,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:49:36,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375862437] [2022-11-23 13:49:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375862437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745752069] [2022-11-23 13:49:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:36,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:36,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:36,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:49:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 13:49:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:49:36,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 13:49:37,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745752069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:37,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796658418] [2022-11-23 13:49:37,401 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-23 13:49:37,401 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:37,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:37,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:37,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:39,329 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-23 13:49:39,350 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-23 13:49:39,505 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 48 for LOIs [2022-11-23 13:49:39,843 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-23 13:49:40,232 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-23 13:49:40,243 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 33 for LOIs [2022-11-23 13:49:40,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:49:47,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15655#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-23 13:49:47,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:49:47,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:49:47,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 29 [2022-11-23 13:49:47,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861391811] [2022-11-23 13:49:47,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:49:47,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 13:49:47,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 13:49:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3622, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 13:49:47,651 INFO L87 Difference]: Start difference. First operand 897 states and 1096 transitions. Second operand has 29 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 13 states have call successors, (24), 10 states have call predecessors, (24), 8 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-23 13:49:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:53,989 INFO L93 Difference]: Finished difference Result 2608 states and 3492 transitions. [2022-11-23 13:49:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-23 13:49:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 13 states have call successors, (24), 10 states have call predecessors, (24), 8 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 71 [2022-11-23 13:49:53,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:54,002 INFO L225 Difference]: With dead ends: 2608 [2022-11-23 13:49:54,002 INFO L226 Difference]: Without dead ends: 2069 [2022-11-23 13:49:54,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 167 SyntacticMatches, 9 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2018, Invalid=15274, Unknown=0, NotChecked=0, Total=17292 [2022-11-23 13:49:54,010 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1279 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 4732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:54,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1035 Invalid, 4732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 3805 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 13:49:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-11-23 13:49:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1791. [2022-11-23 13:49:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1246 states have (on average 1.2375601926163724) internal successors, (1542), 1357 states have internal predecessors, (1542), 264 states have call successors, (264), 215 states have call predecessors, (264), 280 states have return successors, (439), 280 states have call predecessors, (439), 264 states have call successors, (439) [2022-11-23 13:49:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2245 transitions. [2022-11-23 13:49:54,517 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2245 transitions. Word has length 71 [2022-11-23 13:49:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:54,518 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2245 transitions. [2022-11-23 13:49:54,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 13 states have call successors, (24), 10 states have call predecessors, (24), 8 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-23 13:49:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2245 transitions. [2022-11-23 13:49:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 13:49:54,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:54,521 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:49:54,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:54,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 13:49:54,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash -734331827, now seen corresponding path program 1 times [2022-11-23 13:49:54,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:54,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365815407] [2022-11-23 13:49:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:49:55,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365815407] [2022-11-23 13:49:55,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365815407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037323626] [2022-11-23 13:49:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:55,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:55,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:49:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 13:49:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:49:56,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037323626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573873921] [2022-11-23 13:49:56,525 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-23 13:49:56,525 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:56,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:56,526 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:56,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:59,363 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-23 13:49:59,557 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 40 for LOIs [2022-11-23 13:49:59,683 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 38 for LOIs [2022-11-23 13:49:59,845 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 49 for LOIs [2022-11-23 13:49:59,852 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 42 for LOIs [2022-11-23 13:49:59,857 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2022-11-23 13:49:59,859 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:07,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22982#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= ~methaneLevelCritical~0 1) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (<= 0 ~head~0.base) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-23 13:50:07,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:07,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:07,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 33 [2022-11-23 13:50:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475725473] [2022-11-23 13:50:07,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:07,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 13:50:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 13:50:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3922, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 13:50:07,627 INFO L87 Difference]: Start difference. First operand 1791 states and 2245 transitions. Second operand has 33 states, 24 states have (on average 4.833333333333333) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-23 13:50:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:14,007 INFO L93 Difference]: Finished difference Result 7437 states and 10316 transitions. [2022-11-23 13:50:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-23 13:50:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 24 states have (on average 4.833333333333333) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 10 states have call successors, (26) Word has length 74 [2022-11-23 13:50:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:14,037 INFO L225 Difference]: With dead ends: 7437 [2022-11-23 13:50:14,038 INFO L226 Difference]: Without dead ends: 6063 [2022-11-23 13:50:14,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 197 SyntacticMatches, 14 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6550 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1548, Invalid=14708, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 13:50:14,049 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 2233 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2237 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 5071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1330 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:14,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2237 Valid, 1342 Invalid, 5071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1330 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 13:50:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-11-23 13:50:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4026. [2022-11-23 13:50:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 2825 states have (on average 1.223362831858407) internal successors, (3456), 3043 states have internal predecessors, (3456), 559 states have call successors, (559), 491 states have call predecessors, (559), 641 states have return successors, (853), 614 states have call predecessors, (853), 559 states have call successors, (853) [2022-11-23 13:50:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 4868 transitions. [2022-11-23 13:50:14,995 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 4868 transitions. Word has length 74 [2022-11-23 13:50:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:14,996 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 4868 transitions. [2022-11-23 13:50:14,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 24 states have (on average 4.833333333333333) internal successors, (116), 25 states have internal predecessors, (116), 12 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (26), 14 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-23 13:50:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 4868 transitions. [2022-11-23 13:50:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 13:50:15,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:15,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:15,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 13:50:15,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1645685728, now seen corresponding path program 1 times [2022-11-23 13:50:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:15,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881625601] [2022-11-23 13:50:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:50:15,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881625601] [2022-11-23 13:50:15,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881625601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97147262] [2022-11-23 13:50:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:15,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:15,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:15,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:50:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 13:50:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 13:50:16,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 13:50:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97147262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681085833] [2022-11-23 13:50:16,799 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 13:50:16,799 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:16,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:16,800 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:16,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:18,750 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 43 for LOIs [2022-11-23 13:50:18,891 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 27 for LOIs [2022-11-23 13:50:18,967 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 27 for LOIs [2022-11-23 13:50:19,080 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 29 for LOIs [2022-11-23 13:50:19,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:26,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40959#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (<= 0 |#NULL.base|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (<= |#NULL.offset| 0) (<= ~methaneLevelCritical~0 0) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-23 13:50:26,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:26,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:26,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-11-23 13:50:26,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072844642] [2022-11-23 13:50:26,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:26,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 13:50:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 13:50:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3018, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 13:50:26,079 INFO L87 Difference]: Start difference. First operand 4026 states and 4868 transitions. Second operand has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-23 13:50:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:36,314 INFO L93 Difference]: Finished difference Result 10954 states and 13947 transitions. [2022-11-23 13:50:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-23 13:50:36,315 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) Word has length 81 [2022-11-23 13:50:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:36,365 INFO L225 Difference]: With dead ends: 10954 [2022-11-23 13:50:36,365 INFO L226 Difference]: Without dead ends: 10113 [2022-11-23 13:50:36,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 264 SyntacticMatches, 4 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13172 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3217, Invalid=30455, Unknown=0, NotChecked=0, Total=33672 [2022-11-23 13:50:36,376 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1647 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 5582 mSolverCounterSat, 1394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 6976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1394 IncrementalHoareTripleChecker+Valid, 5582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:36,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1916 Invalid, 6976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1394 Valid, 5582 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 13:50:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2022-11-23 13:50:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 7402. [2022-11-23 13:50:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 5232 states have (on average 1.2201834862385321) internal successors, (6384), 5584 states have internal predecessors, (6384), 989 states have call successors, (989), 892 states have call predecessors, (989), 1180 states have return successors, (1526), 1120 states have call predecessors, (1526), 989 states have call successors, (1526) [2022-11-23 13:50:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8899 transitions. [2022-11-23 13:50:38,387 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8899 transitions. Word has length 81 [2022-11-23 13:50:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:38,388 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8899 transitions. [2022-11-23 13:50:38,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-23 13:50:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8899 transitions. [2022-11-23 13:50:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 13:50:38,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:38,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:38,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:38,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:38,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1544188245, now seen corresponding path program 1 times [2022-11-23 13:50:38,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366512885] [2022-11-23 13:50:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:38,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:50:39,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:39,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366512885] [2022-11-23 13:50:39,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366512885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:39,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358923787] [2022-11-23 13:50:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:39,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:39,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:39,303 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:39,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:50:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 13:50:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:39,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:50:40,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358923787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:50:40,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33203581] [2022-11-23 13:50:40,866 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-23 13:50:40,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:50:40,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:50:40,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:50:40,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:50:42,895 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 43 for LOIs [2022-11-23 13:50:43,067 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 49 for LOIs [2022-11-23 13:50:43,395 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 38 for LOIs [2022-11-23 13:50:43,560 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 51 for LOIs [2022-11-23 13:50:43,572 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2022-11-23 13:50:43,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:51,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69654#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (<= 0 ~systemActive~0) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-23 13:50:51,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:51,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:51,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 32 [2022-11-23 13:50:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029962688] [2022-11-23 13:50:51,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:51,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 13:50:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 13:50:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=3841, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 13:50:51,468 INFO L87 Difference]: Start difference. First operand 7402 states and 8899 transitions. Second operand has 32 states, 29 states have (on average 4.517241379310345) internal successors, (131), 27 states have internal predecessors, (131), 13 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-23 13:50:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:56,733 INFO L93 Difference]: Finished difference Result 16448 states and 20176 transitions. [2022-11-23 13:50:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-23 13:50:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 4.517241379310345) internal successors, (131), 27 states have internal predecessors, (131), 13 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 85 [2022-11-23 13:50:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:56,776 INFO L225 Difference]: With dead ends: 16448 [2022-11-23 13:50:56,777 INFO L226 Difference]: Without dead ends: 9630 [2022-11-23 13:50:56,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 202 SyntacticMatches, 11 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5321 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1578, Invalid=11304, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 13:50:56,799 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 950 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:56,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 520 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 13:50:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9630 states. [2022-11-23 13:50:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9630 to 5884. [2022-11-23 13:50:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5884 states, 4170 states have (on average 1.2167865707434053) internal successors, (5074), 4478 states have internal predecessors, (5074), 810 states have call successors, (810), 698 states have call predecessors, (810), 903 states have return successors, (1199), 832 states have call predecessors, (1199), 810 states have call successors, (1199) [2022-11-23 13:50:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5884 states to 5884 states and 7083 transitions. [2022-11-23 13:50:58,073 INFO L78 Accepts]: Start accepts. Automaton has 5884 states and 7083 transitions. Word has length 85 [2022-11-23 13:50:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 5884 states and 7083 transitions. [2022-11-23 13:50:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 4.517241379310345) internal successors, (131), 27 states have internal predecessors, (131), 13 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-23 13:50:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5884 states and 7083 transitions. [2022-11-23 13:50:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 13:50:58,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:58,083 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 13:50:58,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 13:50:58,289 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1688946847, now seen corresponding path program 2 times [2022-11-23 13:50:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610027673] [2022-11-23 13:50:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 13:50:59,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610027673] [2022-11-23 13:50:59,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610027673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602192769] [2022-11-23 13:50:59,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:50:59,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:59,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:59,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:59,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:50:59,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:50:59,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:50:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 13:50:59,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 13:50:59,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:59,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602192769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:59,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:59,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2022-11-23 13:50:59,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570828287] [2022-11-23 13:50:59,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:59,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:50:59,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:59,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:50:59,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:50:59,347 INFO L87 Difference]: Start difference. First operand 5884 states and 7083 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 13:51:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:00,896 INFO L93 Difference]: Finished difference Result 11042 states and 13368 transitions. [2022-11-23 13:51:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:51:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 106 [2022-11-23 13:51:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:00,925 INFO L225 Difference]: With dead ends: 11042 [2022-11-23 13:51:00,926 INFO L226 Difference]: Without dead ends: 6567 [2022-11-23 13:51:00,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-23 13:51:00,938 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 68 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:00,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 366 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-11-23 13:51:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 6438. [2022-11-23 13:51:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 4585 states have (on average 1.2122137404580153) internal successors, (5558), 4907 states have internal predecessors, (5558), 872 states have call successors, (872), 777 states have call predecessors, (872), 980 states have return successors, (1250), 891 states have call predecessors, (1250), 872 states have call successors, (1250) [2022-11-23 13:51:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 7680 transitions. [2022-11-23 13:51:02,329 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 7680 transitions. Word has length 106 [2022-11-23 13:51:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:02,329 INFO L495 AbstractCegarLoop]: Abstraction has 6438 states and 7680 transitions. [2022-11-23 13:51:02,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 13:51:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 7680 transitions. [2022-11-23 13:51:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 13:51:02,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:02,340 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-23 13:51:02,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:02,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 13:51:02,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1326730206, now seen corresponding path program 1 times [2022-11-23 13:51:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:02,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364733042] [2022-11-23 13:51:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 13:51:02,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364733042] [2022-11-23 13:51:02,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364733042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479194791] [2022-11-23 13:51:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:02,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:02,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:02,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:51:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 13:51:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 69 proven. 58 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 13:51:03,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 13:51:05,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479194791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:05,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249854185] [2022-11-23 13:51:05,031 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2022-11-23 13:51:05,032 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:05,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:05,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:05,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:06,577 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-23 13:51:06,590 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-23 13:51:06,715 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 48 for LOIs [2022-11-23 13:51:07,107 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 59 for LOIs [2022-11-23 13:51:07,421 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-23 13:51:07,430 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 33 for LOIs [2022-11-23 13:51:07,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:51:16,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '131521#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~2#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~9#1| ~waterLevel~0) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~2#1|))' at error location [2022-11-23 13:51:16,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:51:16,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:51:16,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 41 [2022-11-23 13:51:16,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867038372] [2022-11-23 13:51:16,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:16,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 13:51:16,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 13:51:16,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=5020, Unknown=0, NotChecked=0, Total=5700 [2022-11-23 13:51:16,108 INFO L87 Difference]: Start difference. First operand 6438 states and 7680 transitions. Second operand has 41 states, 36 states have (on average 5.222222222222222) internal successors, (188), 37 states have internal predecessors, (188), 21 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) [2022-11-23 13:51:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:19,617 INFO L93 Difference]: Finished difference Result 8321 states and 10083 transitions. [2022-11-23 13:51:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 13:51:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 5.222222222222222) internal successors, (188), 37 states have internal predecessors, (188), 21 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) Word has length 126 [2022-11-23 13:51:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:19,620 INFO L225 Difference]: With dead ends: 8321 [2022-11-23 13:51:19,620 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 13:51:19,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 315 SyntacticMatches, 15 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6017 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1881, Invalid=12881, Unknown=0, NotChecked=0, Total=14762 [2022-11-23 13:51:19,639 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1405 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:19,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 467 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 13:51:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 13:51:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 13:51:19,640 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) [2022-11-23 13:51:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 13:51:19,641 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2022-11-23 13:51:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:19,642 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 13:51:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 5.222222222222222) internal successors, (188), 37 states have internal predecessors, (188), 21 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (41), 20 states have call predecessors, (41), 21 states have call successors, (41) [2022-11-23 13:51:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 13:51:19,642 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 13:51:19,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 13:51:19,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:19,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_438b1182-1b41-4ec4-984a-24311424a3ca/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 13:51:19,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 13:51:59,721 WARN L233 SmtUtils]: Spent 36.55s on a formula simplification. DAG size of input: 751 DAG size of output: 702 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-23 13:52:30,747 WARN L233 SmtUtils]: Spent 20.72s on a formula simplification. DAG size of input: 737 DAG size of output: 620 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-23 13:52:57,298 WARN L233 SmtUtils]: Spent 26.55s on a formula simplification. DAG size of input: 977 DAG size of output: 925 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)