./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 0619cf376c55d0c5059a9fcafc1519de09a8e72548b38d7587e0bc4190ad2779 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:05:30,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:05:30,267 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:05:30,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:05:30,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:05:30,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:05:30,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:05:30,298 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:05:30,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:05:30,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:05:30,299 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:05:30,300 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:05:30,300 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:05:30,301 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:05:30,301 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:05:30,302 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:05:30,302 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:05:30,303 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:05:30,303 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:05:30,304 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:05:30,304 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:05:30,305 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:05:30,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:05:30,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:05:30,307 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:05:30,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:05:30,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:05:30,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:05:30,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:05:30,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:05:30,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:05:30,317 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:05:30,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:05:30,318 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:05:30,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:05:30,319 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:05:30,319 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:05:30,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:05:30,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:05:30,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:05:30,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:05:30,322 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:05:30,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:05:30,323 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:05:30,323 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:05:30,323 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:05:30,324 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:05:30,324 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0619cf376c55d0c5059a9fcafc1519de09a8e72548b38d7587e0bc4190ad2779 [2023-12-02 17:05:30,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:05:30,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:05:30,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:05:30,567 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:05:30,567 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:05:30,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c [2023-12-02 17:05:33,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:05:33,448 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:05:33,448 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c [2023-12-02 17:05:33,462 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/data/dbbb9cac3/0ce46e578d6f40f689cce9b4fdc179c9/FLAGabd88f4e5 [2023-12-02 17:05:33,475 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/data/dbbb9cac3/0ce46e578d6f40f689cce9b4fdc179c9 [2023-12-02 17:05:33,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:05:33,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:05:33,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:05:33,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:05:33,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:05:33,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65246b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33, skipping insertion in model container [2023-12-02 17:05:33,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,534 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:05:33,777 WARN L240 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_9f0f7d05-466d-4b44-9a0f-65a3149ca503/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c[16710,16723] [2023-12-02 17:05:33,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:05:33,798 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:05:33,808 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] [2023-12-02 17:05:33,810 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [153] [2023-12-02 17:05:33,810 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [221] [2023-12-02 17:05:33,810 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [439] [2023-12-02 17:05:33,810 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [805] [2023-12-02 17:05:33,810 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [833] [2023-12-02 17:05:33,811 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [842] [2023-12-02 17:05:33,811 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [877] [2023-12-02 17:05:33,856 WARN L240 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_9f0f7d05-466d-4b44-9a0f-65a3149ca503/sv-benchmarks/c/product-lines/minepump_spec4_product47.cil.c[16710,16723] [2023-12-02 17:05:33,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:05:33,879 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:05:33,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33 WrapperNode [2023-12-02 17:05:33,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:05:33,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:05:33,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:05:33,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:05:33,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,924 INFO L138 Inliner]: procedures = 55, calls = 101, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 209 [2023-12-02 17:05:33,925 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:05:33,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:05:33,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:05:33,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:05:33,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:05:33,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:05:33,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:05:33,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:05:33,954 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (1/1) ... [2023-12-02 17:05:33,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:05:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:33,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:05:33,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:05:34,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:05:34,014 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-12-02 17:05:34,014 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-12-02 17:05:34,015 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 17:05:34,015 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 17:05:34,015 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 17:05:34,015 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 17:05:34,015 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-12-02 17:05:34,015 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-12-02 17:05:34,015 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-12-02 17:05:34,016 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-12-02 17:05:34,016 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-12-02 17:05:34,016 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-12-02 17:05:34,016 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-12-02 17:05:34,016 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-12-02 17:05:34,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:05:34,016 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-12-02 17:05:34,017 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-12-02 17:05:34,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:05:34,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:05:34,089 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:05:34,092 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:05:34,326 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:05:34,423 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:05:34,423 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:05:34,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:05:34 BoogieIcfgContainer [2023-12-02 17:05:34,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:05:34,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:05:34,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:05:34,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:05:34,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:05:33" (1/3) ... [2023-12-02 17:05:34,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dd6cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:05:34, skipping insertion in model container [2023-12-02 17:05:34,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:33" (2/3) ... [2023-12-02 17:05:34,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79dd6cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:05:34, skipping insertion in model container [2023-12-02 17:05:34,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:05:34" (3/3) ... [2023-12-02 17:05:34,434 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product47.cil.c [2023-12-02 17:05:34,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:05:34,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:05:34,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:05:34,508 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=LoopHeads, 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;@5a92e568, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:05:34,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:05:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 17:05:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:05:34,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:34,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:34,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:34,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1454168646, now seen corresponding path program 1 times [2023-12-02 17:05:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064038710] [2023-12-02 17:05:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:34,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:05:34,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:34,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064038710] [2023-12-02 17:05:34,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064038710] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:34,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:05:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329835117] [2023-12-02 17:05:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:34,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:05:34,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:05:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:05:34,774 INFO L87 Difference]: Start difference. First operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 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) [2023-12-02 17:05:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:34,834 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2023-12-02 17:05:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:05:34,836 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 [2023-12-02 17:05:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:34,845 INFO L225 Difference]: With dead ends: 128 [2023-12-02 17:05:34,846 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 17:05:34,849 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 [2023-12-02 17:05:34,853 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:34,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:05:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 17:05:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 17:05:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 46 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 17:05:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2023-12-02 17:05:34,898 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2023-12-02 17:05:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:34,899 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2023-12-02 17:05:34,899 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) [2023-12-02 17:05:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2023-12-02 17:05:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:05:34,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:34,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:34,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:05:34,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:34,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash 998047794, now seen corresponding path program 1 times [2023-12-02 17:05:34,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82148370] [2023-12-02 17:05:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:05:34,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82148370] [2023-12-02 17:05:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82148370] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:05:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378060086] [2023-12-02 17:05:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:05:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:05:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:05:34,998 INFO L87 Difference]: Start difference. First operand 60 states and 78 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) [2023-12-02 17:05:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:35,036 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2023-12-02 17:05:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:05:35,037 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 [2023-12-02 17:05:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:35,039 INFO L225 Difference]: With dead ends: 92 [2023-12-02 17:05:35,039 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 17:05:35,040 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 [2023-12-02 17:05:35,042 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:35,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:05:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 17:05:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 17:05:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 17:05:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2023-12-02 17:05:35,052 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 13 [2023-12-02 17:05:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:35,053 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2023-12-02 17:05:35,053 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) [2023-12-02 17:05:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2023-12-02 17:05:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:05:35,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:35,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:35,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:05:35,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:35,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash -973465868, now seen corresponding path program 1 times [2023-12-02 17:05:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820321728] [2023-12-02 17:05:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:05:35,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820321728] [2023-12-02 17:05:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820321728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:35,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:05:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748731551] [2023-12-02 17:05:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:35,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:05:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:05:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:05:35,164 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-12-02 17:05:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:35,298 INFO L93 Difference]: Finished difference Result 145 states and 194 transitions. [2023-12-02 17:05:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:05:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2023-12-02 17:05:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:35,301 INFO L225 Difference]: With dead ends: 145 [2023-12-02 17:05:35,301 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 17:05:35,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:05:35,303 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:35,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 128 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:05:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 17:05:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2023-12-02 17:05:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 62 states have internal predecessors, (70), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (16), 11 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 17:05:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2023-12-02 17:05:35,322 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 16 [2023-12-02 17:05:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:35,322 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2023-12-02 17:05:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-12-02 17:05:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2023-12-02 17:05:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 17:05:35,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:35,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:35,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:05:35,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:35,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1154660714, now seen corresponding path program 1 times [2023-12-02 17:05:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460444595] [2023-12-02 17:05:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:05:35,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460444595] [2023-12-02 17:05:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460444595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:35,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:35,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:05:35,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722123602] [2023-12-02 17:05:35,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:35,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:05:35,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:05:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:05:35,480 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2023-12-02 17:05:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:35,605 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2023-12-02 17:05:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:05:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2023-12-02 17:05:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:35,608 INFO L225 Difference]: With dead ends: 241 [2023-12-02 17:05:35,608 INFO L226 Difference]: Without dead ends: 165 [2023-12-02 17:05:35,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:05:35,610 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 81 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:35,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 166 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:05:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-02 17:05:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2023-12-02 17:05:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 109 states have (on average 1.311926605504587) internal successors, (143), 127 states have internal predecessors, (143), 27 states have call successors, (27), 23 states have call predecessors, (27), 25 states have return successors, (32), 25 states have call predecessors, (32), 27 states have call successors, (32) [2023-12-02 17:05:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-12-02 17:05:35,639 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 19 [2023-12-02 17:05:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:35,640 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-12-02 17:05:35,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2023-12-02 17:05:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-12-02 17:05:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 17:05:35,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:35,643 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:05:35,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:05:35,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:35,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -326542520, now seen corresponding path program 1 times [2023-12-02 17:05:35,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:35,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994362468] [2023-12-02 17:05:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:35,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:05:35,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994362468] [2023-12-02 17:05:35,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994362468] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437165242] [2023-12-02 17:05:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:35,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:35,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:05:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:35,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:05:35,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:05:36,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:05:36,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437165242] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:36,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:05:36,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 17:05:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6785409] [2023-12-02 17:05:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:05:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:05:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:05:36,015 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 17:05:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:36,221 INFO L93 Difference]: Finished difference Result 307 states and 394 transitions. [2023-12-02 17:05:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:05:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-12-02 17:05:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:36,224 INFO L225 Difference]: With dead ends: 307 [2023-12-02 17:05:36,225 INFO L226 Difference]: Without dead ends: 231 [2023-12-02 17:05:36,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:05:36,227 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 135 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:36,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 166 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:05:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-12-02 17:05:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2023-12-02 17:05:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 156 states have (on average 1.294871794871795) internal successors, (202), 174 states have internal predecessors, (202), 32 states have call successors, (32), 31 states have call predecessors, (32), 35 states have return successors, (44), 35 states have call predecessors, (44), 32 states have call successors, (44) [2023-12-02 17:05:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 278 transitions. [2023-12-02 17:05:36,262 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 278 transitions. Word has length 52 [2023-12-02 17:05:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:36,262 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 278 transitions. [2023-12-02 17:05:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 17:05:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 278 transitions. [2023-12-02 17:05:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 17:05:36,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:36,265 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:05:36,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:05:36,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:36,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:36,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:36,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1185824576, now seen corresponding path program 1 times [2023-12-02 17:05:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:36,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057286100] [2023-12-02 17:05:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:05:36,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057286100] [2023-12-02 17:05:36,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057286100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:36,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:36,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:05:36,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401148862] [2023-12-02 17:05:36,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:36,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:05:36,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:36,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:05:36,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:05:36,571 INFO L87 Difference]: Start difference. First operand 224 states and 278 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 17:05:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:36,736 INFO L93 Difference]: Finished difference Result 570 states and 720 transitions. [2023-12-02 17:05:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:05:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-12-02 17:05:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:36,741 INFO L225 Difference]: With dead ends: 570 [2023-12-02 17:05:36,741 INFO L226 Difference]: Without dead ends: 432 [2023-12-02 17:05:36,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:05:36,743 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 46 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:36,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 230 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:05:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-12-02 17:05:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 416. [2023-12-02 17:05:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 297 states have (on average 1.2996632996632997) internal successors, (386), 324 states have internal predecessors, (386), 56 states have call successors, (56), 55 states have call predecessors, (56), 62 states have return successors, (78), 62 states have call predecessors, (78), 56 states have call successors, (78) [2023-12-02 17:05:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 520 transitions. [2023-12-02 17:05:36,804 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 520 transitions. Word has length 52 [2023-12-02 17:05:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:36,805 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 520 transitions. [2023-12-02 17:05:36,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 17:05:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 520 transitions. [2023-12-02 17:05:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 17:05:36,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:36,808 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:05:36,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:05:36,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:36,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1941463095, now seen corresponding path program 1 times [2023-12-02 17:05:36,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004544263] [2023-12-02 17:05:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:05:36,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004544263] [2023-12-02 17:05:36,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004544263] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772925025] [2023-12-02 17:05:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:36,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:36,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:05:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:37,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:05:37,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:05:37,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:05:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772925025] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:37,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:05:37,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-12-02 17:05:37,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104901875] [2023-12-02 17:05:37,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:05:37,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:05:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:05:37,100 INFO L87 Difference]: Start difference. First operand 416 states and 520 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:05:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:37,180 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2023-12-02 17:05:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:05:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-12-02 17:05:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:37,184 INFO L225 Difference]: With dead ends: 427 [2023-12-02 17:05:37,184 INFO L226 Difference]: Without dead ends: 425 [2023-12-02 17:05:37,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:05:37,185 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 41 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:37,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:05:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-12-02 17:05:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 416. [2023-12-02 17:05:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 297 states have (on average 1.2828282828282829) internal successors, (381), 324 states have internal predecessors, (381), 56 states have call successors, (56), 55 states have call predecessors, (56), 62 states have return successors, (78), 62 states have call predecessors, (78), 56 states have call successors, (78) [2023-12-02 17:05:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 515 transitions. [2023-12-02 17:05:37,220 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 515 transitions. Word has length 53 [2023-12-02 17:05:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:37,221 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 515 transitions. [2023-12-02 17:05:37,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:05:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 515 transitions. [2023-12-02 17:05:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 17:05:37,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:37,222 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:37,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:05:37,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 17:05:37,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:37,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:37,424 INFO L85 PathProgramCache]: Analyzing trace with hash -546247970, now seen corresponding path program 1 times [2023-12-02 17:05:37,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:37,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632537424] [2023-12-02 17:05:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:37,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:05:37,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:37,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632537424] [2023-12-02 17:05:37,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632537424] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:37,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339728127] [2023-12-02 17:05:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:37,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:37,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:37,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:37,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:05:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:37,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:05:37,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:05:37,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:05:38,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339728127] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:38,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87411360] [2023-12-02 17:05:38,140 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 17:05:38,140 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:05:38,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:05:38,147 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:05:38,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:05:41,367 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 148 for LOIs [2023-12-02 17:05:42,417 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 142 for LOIs [2023-12-02 17:05:43,188 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 135 for LOIs [2023-12-02 17:05:43,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:05:51,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [87411360] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:51,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:05:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [8, 7, 7] total 39 [2023-12-02 17:05:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705697796] [2023-12-02 17:05:51,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:51,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 17:05:51,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 17:05:51,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:05:51,899 INFO L87 Difference]: Start difference. First operand 416 states and 515 transitions. Second operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:05:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:58,626 INFO L93 Difference]: Finished difference Result 896 states and 1111 transitions. [2023-12-02 17:05:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:05:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2023-12-02 17:05:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:58,630 INFO L225 Difference]: With dead ends: 896 [2023-12-02 17:05:58,630 INFO L226 Difference]: Without dead ends: 482 [2023-12-02 17:05:58,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=483, Invalid=2273, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 17:05:58,633 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 82 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:58,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 514 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 17:05:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-12-02 17:05:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 469. [2023-12-02 17:05:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 336 states have (on average 1.2738095238095237) internal successors, (428), 364 states have internal predecessors, (428), 63 states have call successors, (63), 62 states have call predecessors, (63), 69 states have return successors, (85), 68 states have call predecessors, (85), 63 states have call successors, (85) [2023-12-02 17:05:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 576 transitions. [2023-12-02 17:05:58,692 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 576 transitions. Word has length 54 [2023-12-02 17:05:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:58,693 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 576 transitions. [2023-12-02 17:05:58,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:05:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 576 transitions. [2023-12-02 17:05:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 17:05:58,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:58,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:58,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 17:05:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 17:05:58,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1431784129, now seen corresponding path program 1 times [2023-12-02 17:05:58,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:58,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264048199] [2023-12-02 17:05:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:05:59,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:59,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264048199] [2023-12-02 17:05:59,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264048199] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365058954] [2023-12-02 17:05:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:59,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:59,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:05:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:59,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:05:59,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:05:59,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:05:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365058954] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085922379] [2023-12-02 17:05:59,269 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 17:05:59,269 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:05:59,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:05:59,269 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:05:59,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:04,348 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 138 for LOIs [2023-12-02 17:06:04,415 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2023-12-02 17:06:04,477 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 19 for LOIs [2023-12-02 17:06:04,546 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 20 for LOIs [2023-12-02 17:06:04,550 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:06,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2085922379] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:06:06,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:06:06,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [8, 6, 6] total 38 [2023-12-02 17:06:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043277970] [2023-12-02 17:06:06,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:06:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:06:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:06:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:06:06,251 INFO L87 Difference]: Start difference. First operand 469 states and 576 transitions. Second operand has 27 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:06:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:11,726 INFO L93 Difference]: Finished difference Result 1334 states and 1850 transitions. [2023-12-02 17:06:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 17:06:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2023-12-02 17:06:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:11,733 INFO L225 Difference]: With dead ends: 1334 [2023-12-02 17:06:11,733 INFO L226 Difference]: Without dead ends: 995 [2023-12-02 17:06:11,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=879, Invalid=5601, Unknown=0, NotChecked=0, Total=6480 [2023-12-02 17:06:11,737 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 432 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:11,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 471 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:06:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-12-02 17:06:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 490. [2023-12-02 17:06:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 348 states have (on average 1.2586206896551724) internal successors, (438), 378 states have internal predecessors, (438), 68 states have call successors, (68), 67 states have call predecessors, (68), 73 states have return successors, (90), 70 states have call predecessors, (90), 68 states have call successors, (90) [2023-12-02 17:06:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 596 transitions. [2023-12-02 17:06:11,854 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 596 transitions. Word has length 57 [2023-12-02 17:06:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:11,854 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 596 transitions. [2023-12-02 17:06:11,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:06:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 596 transitions. [2023-12-02 17:06:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:06:11,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:11,857 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:06:11,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:06:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:12,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:12,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1982284250, now seen corresponding path program 1 times [2023-12-02 17:06:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:12,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532010726] [2023-12-02 17:06:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:06:12,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532010726] [2023-12-02 17:06:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532010726] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:12,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903659439] [2023-12-02 17:06:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:12,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:12,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:12,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:06:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:12,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:06:12,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:06:12,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:06:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903659439] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969582101] [2023-12-02 17:06:13,121 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-12-02 17:06:13,121 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:13,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:13,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:13,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:18,223 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 136 for LOIs [2023-12-02 17:06:18,288 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2023-12-02 17:06:18,358 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 30 for LOIs [2023-12-02 17:06:18,458 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 36 for LOIs [2023-12-02 17:06:18,471 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 11 for LOIs [2023-12-02 17:06:18,472 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:20,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10260#(and (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483648)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (= ~waterLevel~0 0))' at error location [2023-12-02 17:06:20,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:20,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:06:20,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 31 [2023-12-02 17:06:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278430546] [2023-12-02 17:06:20,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:20,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 17:06:20,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 17:06:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=3647, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:06:20,610 INFO L87 Difference]: Start difference. First operand 490 states and 596 transitions. Second operand has 31 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 29 states have internal predecessors, (107), 13 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 17:06:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:24,141 INFO L93 Difference]: Finished difference Result 2003 states and 2651 transitions. [2023-12-02 17:06:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-02 17:06:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 29 states have internal predecessors, (107), 13 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) Word has length 60 [2023-12-02 17:06:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:24,152 INFO L225 Difference]: With dead ends: 2003 [2023-12-02 17:06:24,152 INFO L226 Difference]: Without dead ends: 1741 [2023-12-02 17:06:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7715 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2378, Invalid=17644, Unknown=0, NotChecked=0, Total=20022 [2023-12-02 17:06:24,162 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1312 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:24,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1324 Valid, 927 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:06:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2023-12-02 17:06:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1499. [2023-12-02 17:06:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1083 states have (on average 1.2714681440443214) internal successors, (1377), 1167 states have internal predecessors, (1377), 206 states have call successors, (206), 189 states have call predecessors, (206), 209 states have return successors, (313), 207 states have call predecessors, (313), 206 states have call successors, (313) [2023-12-02 17:06:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 1896 transitions. [2023-12-02 17:06:24,375 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 1896 transitions. Word has length 60 [2023-12-02 17:06:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:24,375 INFO L495 AbstractCegarLoop]: Abstraction has 1499 states and 1896 transitions. [2023-12-02 17:06:24,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 29 states have internal predecessors, (107), 13 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 17:06:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 1896 transitions. [2023-12-02 17:06:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 17:06:24,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:24,378 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:06:24,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 17:06:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:24,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:24,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1549402724, now seen corresponding path program 1 times [2023-12-02 17:06:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984636744] [2023-12-02 17:06:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:06:24,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:24,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984636744] [2023-12-02 17:06:24,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984636744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:06:24,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:06:24,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:06:24,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182980556] [2023-12-02 17:06:24,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:06:24,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:06:24,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:06:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:06:24,619 INFO L87 Difference]: Start difference. First operand 1499 states and 1896 transitions. Second operand has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 17:06:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:24,867 INFO L93 Difference]: Finished difference Result 2611 states and 3295 transitions. [2023-12-02 17:06:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:06:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2023-12-02 17:06:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:24,874 INFO L225 Difference]: With dead ends: 2611 [2023-12-02 17:06:24,874 INFO L226 Difference]: Without dead ends: 849 [2023-12-02 17:06:24,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:06:24,879 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 85 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:24,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 114 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:06:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-12-02 17:06:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 788. [2023-12-02 17:06:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 552 states have (on average 1.1884057971014492) internal successors, (656), 592 states have internal predecessors, (656), 114 states have call successors, (114), 107 states have call predecessors, (114), 121 states have return successors, (158), 116 states have call predecessors, (158), 114 states have call successors, (158) [2023-12-02 17:06:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 928 transitions. [2023-12-02 17:06:24,997 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 928 transitions. Word has length 63 [2023-12-02 17:06:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:24,998 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 928 transitions. [2023-12-02 17:06:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 17:06:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 928 transitions. [2023-12-02 17:06:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:06:25,000 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:25,000 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:06:25,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:06:25,000 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:25,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1488894756, now seen corresponding path program 1 times [2023-12-02 17:06:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011010723] [2023-12-02 17:06:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:06:25,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:25,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011010723] [2023-12-02 17:06:25,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011010723] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:25,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643445242] [2023-12-02 17:06:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:25,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:25,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:06:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:25,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 17:06:25,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:06:25,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:06:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643445242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:25,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980749019] [2023-12-02 17:06:25,652 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-12-02 17:06:25,652 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:25,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:25,653 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:25,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:27,096 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 33 for LOIs [2023-12-02 17:06:27,282 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 17 for LOIs [2023-12-02 17:06:27,368 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 38 for LOIs [2023-12-02 17:06:27,380 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 138 for LOIs [2023-12-02 17:06:27,416 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 20 for LOIs [2023-12-02 17:06:27,418 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:30,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19826#(and (<= 1 |#StackHeapBarrier|) (<= ~methaneLevelCritical~0 1) (= ~head~0.offset 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483648)) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (= ~head~0.base 0) (= ~waterLevel~0 0) (= ~cleanupTimeShifts~0 4))' at error location [2023-12-02 17:06:30,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:30,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:06:30,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 24 [2023-12-02 17:06:30,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099141821] [2023-12-02 17:06:30,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:06:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:06:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:06:30,501 INFO L87 Difference]: Start difference. First operand 788 states and 928 transitions. Second operand has 24 states, 18 states have (on average 5.444444444444445) internal successors, (98), 19 states have internal predecessors, (98), 10 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-02 17:06:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:31,205 INFO L93 Difference]: Finished difference Result 1712 states and 2056 transitions. [2023-12-02 17:06:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:06:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 5.444444444444445) internal successors, (98), 19 states have internal predecessors, (98), 10 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) Word has length 60 [2023-12-02 17:06:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:31,212 INFO L225 Difference]: With dead ends: 1712 [2023-12-02 17:06:31,212 INFO L226 Difference]: Without dead ends: 1243 [2023-12-02 17:06:31,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=399, Invalid=3633, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:06:31,215 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:31,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 238 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:06:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-12-02 17:06:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1236. [2023-12-02 17:06:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 867 states have (on average 1.1856978085351788) internal successors, (1028), 929 states have internal predecessors, (1028), 179 states have call successors, (179), 167 states have call predecessors, (179), 189 states have return successors, (253), 181 states have call predecessors, (253), 179 states have call successors, (253) [2023-12-02 17:06:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1460 transitions. [2023-12-02 17:06:31,353 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1460 transitions. Word has length 60 [2023-12-02 17:06:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:31,353 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1460 transitions. [2023-12-02 17:06:31,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 5.444444444444445) internal successors, (98), 19 states have internal predecessors, (98), 10 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-02 17:06:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1460 transitions. [2023-12-02 17:06:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 17:06:31,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:31,355 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:06:31,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 17:06:31,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:31,556 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:31,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 742954545, now seen corresponding path program 1 times [2023-12-02 17:06:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:31,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72628342] [2023-12-02 17:06:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:06:31,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72628342] [2023-12-02 17:06:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72628342] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561148299] [2023-12-02 17:06:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:31,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:31,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:31,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:06:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:31,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 17:06:31,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:06:32,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:06:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561148299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:32,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044248260] [2023-12-02 17:06:32,532 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-12-02 17:06:32,532 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:32,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:32,533 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:32,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:34,975 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 49 for LOIs [2023-12-02 17:06:35,369 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 76 for LOIs [2023-12-02 17:06:35,753 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 67 for LOIs [2023-12-02 17:06:35,796 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 33 for LOIs [2023-12-02 17:06:35,803 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 60 for LOIs [2023-12-02 17:06:35,823 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:39,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24148#(and (<= |old(~waterLevel~0)| 2147483647) (<= 1 |#StackHeapBarrier|) (<= ~methaneLevelCritical~0 1) (= ~head~0.offset 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 (+ |old(~waterLevel~0)| 2147483648)) (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 2147483648)) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~9#1| 0) (= ~head~0.base 0) (= ~waterLevel~0 0) (= ~cleanupTimeShifts~0 4))' at error location [2023-12-02 17:06:39,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:39,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:06:39,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 35 [2023-12-02 17:06:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357071320] [2023-12-02 17:06:39,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 17:06:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 17:06:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=3971, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 17:06:39,703 INFO L87 Difference]: Start difference. First operand 1236 states and 1460 transitions. Second operand has 35 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 27 states have internal predecessors, (122), 14 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (22), 16 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-02 17:06:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:42,321 INFO L93 Difference]: Finished difference Result 4753 states and 6308 transitions. [2023-12-02 17:06:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 17:06:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 27 states have internal predecessors, (122), 14 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (22), 16 states have call predecessors, (22), 12 states have call successors, (22) Word has length 63 [2023-12-02 17:06:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:42,347 INFO L225 Difference]: With dead ends: 4753 [2023-12-02 17:06:42,347 INFO L226 Difference]: Without dead ends: 3819 [2023-12-02 17:06:42,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1269, Invalid=10503, Unknown=0, NotChecked=0, Total=11772 [2023-12-02 17:06:42,358 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1273 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:42,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1276 Valid, 860 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:06:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2023-12-02 17:06:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 2663. [2023-12-02 17:06:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 1875 states have (on average 1.1866666666666668) internal successors, (2225), 2007 states have internal predecessors, (2225), 381 states have call successors, (381), 345 states have call predecessors, (381), 406 states have return successors, (570), 385 states have call predecessors, (570), 381 states have call successors, (570) [2023-12-02 17:06:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3176 transitions. [2023-12-02 17:06:42,863 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3176 transitions. Word has length 63 [2023-12-02 17:06:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:42,863 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 3176 transitions. [2023-12-02 17:06:42,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 4.6923076923076925) internal successors, (122), 27 states have internal predecessors, (122), 14 states have call successors, (25), 12 states have call predecessors, (25), 14 states have return successors, (22), 16 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-02 17:06:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3176 transitions. [2023-12-02 17:06:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 17:06:42,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:42,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:06:42,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:06:43,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:43,074 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:43,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1538803029, now seen corresponding path program 1 times [2023-12-02 17:06:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640035492] [2023-12-02 17:06:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:43,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:06:43,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640035492] [2023-12-02 17:06:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640035492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405280344] [2023-12-02 17:06:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:43,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:43,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:06:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:43,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:06:43,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:06:43,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:06:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405280344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:06:43,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:06:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2023-12-02 17:06:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325406597] [2023-12-02 17:06:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:06:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:06:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:06:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:06:43,729 INFO L87 Difference]: Start difference. First operand 2663 states and 3176 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 17:06:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:44,382 INFO L93 Difference]: Finished difference Result 5645 states and 6972 transitions. [2023-12-02 17:06:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:06:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 88 [2023-12-02 17:06:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:44,401 INFO L225 Difference]: With dead ends: 5645 [2023-12-02 17:06:44,401 INFO L226 Difference]: Without dead ends: 3294 [2023-12-02 17:06:44,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:06:44,406 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 79 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:44,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 186 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:06:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2023-12-02 17:06:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3172. [2023-12-02 17:06:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3172 states, 2288 states have (on average 1.1896853146853146) internal successors, (2722), 2407 states have internal predecessors, (2722), 469 states have call successors, (469), 425 states have call predecessors, (469), 414 states have return successors, (662), 417 states have call predecessors, (662), 469 states have call successors, (662) [2023-12-02 17:06:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3853 transitions. [2023-12-02 17:06:44,783 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 3853 transitions. Word has length 88 [2023-12-02 17:06:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:44,783 INFO L495 AbstractCegarLoop]: Abstraction has 3172 states and 3853 transitions. [2023-12-02 17:06:44,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 5 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 17:06:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 3853 transitions. [2023-12-02 17:06:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 17:06:44,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:44,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:06:44,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:06:44,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:06:44,987 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:44,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:44,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1220422086, now seen corresponding path program 2 times [2023-12-02 17:06:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:44,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829867224] [2023-12-02 17:06:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:44,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:06:45,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 17:06:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 17:06:45,033 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 17:06:45,033 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 17:06:45,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 17:06:45,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:06:45,037 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:06:45,040 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 17:06:45,073 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-12-02 17:06:45,077 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 17:06:45,080 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 17:06:45,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:06:45 BoogieIcfgContainer [2023-12-02 17:06:45,102 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 17:06:45,102 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 17:06:45,103 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 17:06:45,103 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 17:06:45,103 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:05:34" (3/4) ... [2023-12-02 17:06:45,104 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 17:06:45,117 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated [2023-12-02 17:06:45,119 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 17:06:45,121 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 17:06:45,172 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 17:06:45,172 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 17:06:45,172 INFO L158 Benchmark]: Toolchain (without parser) took 71693.42ms. Allocated memory was 151.0MB in the beginning and 771.8MB in the end (delta: 620.8MB). Free memory was 113.3MB in the beginning and 565.2MB in the end (delta: -451.8MB). Peak memory consumption was 171.9MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,173 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 151.0MB. Free memory was 119.6MB in the beginning and 119.4MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:06:45,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.25ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 93.5MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,174 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.67ms. Allocated memory is still 151.0MB. Free memory was 93.5MB in the beginning and 91.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,174 INFO L158 Benchmark]: Boogie Preprocessor took 26.90ms. Allocated memory is still 151.0MB. Free memory was 91.4MB in the beginning and 89.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,174 INFO L158 Benchmark]: RCFGBuilder took 472.19ms. Allocated memory is still 151.0MB. Free memory was 89.8MB in the beginning and 64.2MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,175 INFO L158 Benchmark]: TraceAbstraction took 70673.95ms. Allocated memory was 151.0MB in the beginning and 771.8MB in the end (delta: 620.8MB). Free memory was 63.7MB in the beginning and 572.6MB in the end (delta: -508.9MB). Peak memory consumption was 113.2MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,175 INFO L158 Benchmark]: Witness Printer took 69.43ms. Allocated memory is still 771.8MB. Free memory was 572.6MB in the beginning and 565.2MB in the end (delta: 7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-12-02 17:06:45,177 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 151.0MB. Free memory was 119.6MB in the beginning and 119.4MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.25ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 93.5MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.67ms. Allocated memory is still 151.0MB. Free memory was 93.5MB in the beginning and 91.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.90ms. Allocated memory is still 151.0MB. Free memory was 91.4MB in the beginning and 89.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 472.19ms. Allocated memory is still 151.0MB. Free memory was 89.8MB in the beginning and 64.2MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 70673.95ms. Allocated memory was 151.0MB in the beginning and 771.8MB in the end (delta: 620.8MB). Free memory was 63.7MB in the beginning and 572.6MB in the end (delta: -508.9MB). Peak memory consumption was 113.2MB. Max. memory is 16.1GB. * Witness Printer took 69.43ms. Allocated memory is still 771.8MB. Free memory was 572.6MB in the beginning and 565.2MB in the end (delta: 7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 49]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] - GenericResultAtLocation [Line: 153]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [153] - GenericResultAtLocation [Line: 221]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [221] - GenericResultAtLocation [Line: 439]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [439] - GenericResultAtLocation [Line: 805]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [805] - GenericResultAtLocation [Line: 833]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [833] - GenericResultAtLocation [Line: 842]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [842] - GenericResultAtLocation [Line: 877]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [877] - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 838]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L50] int cleanupTimeShifts = 4; [L229] int pumpRunning = 0; [L230] int systemActive = 1; [L609] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L878] int waterLevel = 1; [L879] int methaneLevelCritical = 0; [L131] int retValue_acc ; [L132] int tmp ; [L136] FCALL select_helpers() [L137] FCALL select_features() [L138] CALL, EXPR valid_product() [L869] int retValue_acc ; [L872] retValue_acc = 1 [L873] return (retValue_acc); [L138] RET, EXPR valid_product() [L138] tmp = valid_product() [L140] COND TRUE \read(tmp) [L142] FCALL setup() [L143] CALL runTest() [L122] CALL test() [L156] int splverifierCounter ; [L157] int tmp ; [L158] int tmp___0 ; [L159] int tmp___1 ; [L160] int tmp___2 ; [L163] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L165] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L167] COND TRUE splverifierCounter < 4 [L173] tmp = __VERIFIER_nondet_int() [L175] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L177] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L896] COND TRUE waterLevel < 2 [L897] waterLevel = waterLevel + 1 [L177] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L183] tmp___0 = __VERIFIER_nondet_int() [L185] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L193] tmp___2 = __VERIFIER_nondet_int() [L195] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___2=1, waterLevel=2] [L210] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L237] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L244] COND TRUE \read(systemActive) [L246] CALL processEnvironment() [L292] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L295] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L310] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L266] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L269] COND TRUE ! pumpRunning [L271] CALL, EXPR isHighWaterLevel() [L406] int retValue_acc ; [L407] int tmp ; [L408] int tmp___0 ; [L412] CALL, EXPR isHighWaterSensorDry() [L958] int retValue_acc ; [L961] COND FALSE !(waterLevel < 2) [L965] retValue_acc = 0 [L966] return (retValue_acc); [L412] RET, EXPR isHighWaterSensorDry() [L412] tmp = isHighWaterSensorDry() [L414] COND FALSE !(\read(tmp)) [L417] tmp___0 = 1 [L419] retValue_acc = tmp___0 [L420] return (retValue_acc); [L271] RET, EXPR isHighWaterLevel() [L271] tmp = isHighWaterLevel() [L273] COND TRUE \read(tmp) [L275] CALL activatePump() [L325] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L329] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L350] int retValue_acc ; [L354] CALL, EXPR isMethaneLevelCritical() [L917] int retValue_acc ; [L920] retValue_acc = methaneLevelCritical [L921] return (retValue_acc); [L354] RET, EXPR isMethaneLevelCritical() [L354] retValue_acc = isMethaneLevelCritical() [L356] return (retValue_acc); [L329] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L329] tmp = isMethaneAlarm() [L331] COND FALSE !(\read(tmp)) [L335] CALL activatePump__wrappee__highWaterSensor() [L320] pumpRunning = 1 [L335] RET activatePump__wrappee__highWaterSensor() [L275] RET activatePump() [L310] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L246] RET processEnvironment() [L252] CALL __utac_acc__Specification4_spec__1() [L809] int tmp ; [L810] int tmp___0 ; [L814] CALL, EXPR getWaterLevel() [L949] int retValue_acc ; [L952] retValue_acc = waterLevel [L953] return (retValue_acc); [L814] RET, EXPR getWaterLevel() [L814] tmp = getWaterLevel() [L816] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L252] RET __utac_acc__Specification4_spec__1() [L210] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___2=1, waterLevel=2] [L165] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___2=1, waterLevel=2] [L167] COND TRUE splverifierCounter < 4 [L173] tmp = __VERIFIER_nondet_int() [L175] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=2] [L183] tmp___0 = __VERIFIER_nondet_int() [L185] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=2] [L193] tmp___2 = __VERIFIER_nondet_int() [L195] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=2] [L210] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L237] COND TRUE \read(pumpRunning) [L239] CALL lowerWaterLevel() [L884] COND TRUE waterLevel > 0 [L885] waterLevel = waterLevel - 1 [L239] RET lowerWaterLevel() [L244] COND TRUE \read(systemActive) [L246] CALL processEnvironment() [L292] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L295] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L297] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L350] int retValue_acc ; [L354] CALL, EXPR isMethaneLevelCritical() [L917] int retValue_acc ; [L920] retValue_acc = methaneLevelCritical [L921] return (retValue_acc); [L354] RET, EXPR isMethaneLevelCritical() [L354] retValue_acc = isMethaneLevelCritical() [L356] return (retValue_acc); [L297] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L297] tmp = isMethaneAlarm() [L299] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L305] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L266] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L269] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L284] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L305] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L246] RET processEnvironment() [L252] CALL __utac_acc__Specification4_spec__1() [L809] int tmp ; [L810] int tmp___0 ; [L814] CALL, EXPR getWaterLevel() [L949] int retValue_acc ; [L952] retValue_acc = waterLevel [L953] return (retValue_acc); [L814] RET, EXPR getWaterLevel() [L814] tmp = getWaterLevel() [L816] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L252] RET __utac_acc__Specification4_spec__1() [L210] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L165] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L167] COND TRUE splverifierCounter < 4 [L173] tmp = __VERIFIER_nondet_int() [L175] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L183] tmp___0 = __VERIFIER_nondet_int() [L185] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L193] tmp___2 = __VERIFIER_nondet_int() [L195] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L210] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L237] COND TRUE \read(pumpRunning) [L239] CALL lowerWaterLevel() [L884] COND TRUE waterLevel > 0 [L885] waterLevel = waterLevel - 1 [L239] RET lowerWaterLevel() [L244] COND TRUE \read(systemActive) [L246] CALL processEnvironment() [L292] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L295] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L297] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L350] int retValue_acc ; [L354] CALL, EXPR isMethaneLevelCritical() [L917] int retValue_acc ; [L920] retValue_acc = methaneLevelCritical [L921] return (retValue_acc); [L354] RET, EXPR isMethaneLevelCritical() [L354] retValue_acc = isMethaneLevelCritical() [L356] return (retValue_acc); [L297] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L297] tmp = isMethaneAlarm() [L299] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L305] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L266] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L269] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L284] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L305] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L246] RET processEnvironment() [L252] CALL __utac_acc__Specification4_spec__1() [L809] int tmp ; [L810] int tmp___0 ; [L814] CALL, EXPR getWaterLevel() [L949] int retValue_acc ; [L952] retValue_acc = waterLevel [L953] return (retValue_acc); [L814] RET, EXPR getWaterLevel() [L814] tmp = getWaterLevel() [L816] COND TRUE tmp == 0 [L818] CALL, EXPR isPumpRunning() [L361] int retValue_acc ; [L364] retValue_acc = pumpRunning [L365] return (retValue_acc); [L818] RET, EXPR isPumpRunning() [L818] tmp___0 = isPumpRunning() [L820] COND TRUE \read(tmp___0) [L822] CALL __automaton_fail() [L838] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 65 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 70.6s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3835 SdHoareTripleChecker+Valid, 7.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3783 mSDsluCounter, 4293 SdHoareTripleChecker+Invalid, 6.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3514 mSDsCounter, 2089 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7356 IncrementalHoareTripleChecker+Invalid, 9445 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2089 mSolverCounterUnsat, 779 mSDtfsCounter, 7356 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1409 GetRequests, 902 SyntacticMatches, 10 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15251 ImplicationChecksByTransitivity, 32.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3172occurred in iteration=14, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 14 MinimizatonAttempts, 2158 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1238 NumberOfCodeBlocks, 1238 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1416 ConstructedInterpolants, 0 QuantifiedInterpolants, 4982 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1988 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 27 InterpolantComputations, 9 PerfectInterpolantSequences, 416/577 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 10.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 9, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 73, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 109, TOOLS_POST_TIME: 4.8s, TOOLS_POST_CALL_APPLICATIONS: 41, TOOLS_POST_CALL_TIME: 2.5s, TOOLS_POST_RETURN_APPLICATIONS: 34, TOOLS_POST_RETURN_TIME: 2.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 184, TOOLS_QUANTIFIERELIM_TIME: 9.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.5s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 242, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 29, DOMAIN_JOIN_TIME: 0.8s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 73, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 6.9s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 6.9s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 34, CALL_SUMMARIZER_CACHE_MISSES: 7, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 692, DAG_COMPRESSION_RETAINED_NODES: 203, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 17:06:45,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f0f7d05-466d-4b44-9a0f-65a3149ca503/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE