./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product46.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product46.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2 --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 73b8e020dd9d30fdd676c81009d4f1b850aa716d63ef29ce3d475a261546f853 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:34:22,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:34:22,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:34:22,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:34:22,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:34:22,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:34:22,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:34:22,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:34:22,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:34:22,253 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:34:22,253 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:34:22,253 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:34:22,254 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:34:22,254 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:34:22,254 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:34:22,254 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:34:22,255 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:34:22,258 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:34:22,258 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:34:22,259 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:34:22,259 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:34:22,260 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:34:22,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:34:22,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:34:22,263 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:34:22,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:34:22,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:34:22,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:34:22,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:34:22,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:34:22,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:34:22,277 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:34:22,278 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:34:22,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:34:22,278 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:34:22,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:34:22,279 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:34:22,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:34:22,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:34:22,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:34:22,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:34:22,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:34:22,281 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:34:22,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:34:22,282 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:34:22,283 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:34:22,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:34:22,283 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_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73b8e020dd9d30fdd676c81009d4f1b850aa716d63ef29ce3d475a261546f853 [2024-11-02 12:34:22,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:34:22,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:34:22,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:34:22,627 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:34:22,628 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:34:22,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/minepump_spec5_product46.cil.c Unable to find full path for "g++" [2024-11-02 12:34:24,682 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:34:24,982 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:34:24,983 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/sv-benchmarks/c/product-lines/minepump_spec5_product46.cil.c [2024-11-02 12:34:24,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/data/94fee5296/82dd07732f3d484c8f222dd7e2199a96/FLAG5ed42e0c4 [2024-11-02 12:34:25,259 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/data/94fee5296/82dd07732f3d484c8f222dd7e2199a96 [2024-11-02 12:34:25,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:34:25,264 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:34:25,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:34:25,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:34:25,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:34:25,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:25,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bb13b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25, skipping insertion in model container [2024-11-02 12:34:25,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:25,323 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:34:25,768 WARN L251 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_e5a757dc-db96-4884-82e9-033df2a3ead4/sv-benchmarks/c/product-lines/minepump_spec5_product46.cil.c[15211,15224] [2024-11-02 12:34:25,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:34:25,821 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:34:25,834 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [49] [2024-11-02 12:34:25,836 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [101] [2024-11-02 12:34:25,836 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [206] [2024-11-02 12:34:25,836 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [572] [2024-11-02 12:34:25,837 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [670] [2024-11-02 12:34:25,837 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [705] [2024-11-02 12:34:25,837 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [714] [2024-11-02 12:34:25,838 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [923] [2024-11-02 12:34:25,893 WARN L251 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_e5a757dc-db96-4884-82e9-033df2a3ead4/sv-benchmarks/c/product-lines/minepump_spec5_product46.cil.c[15211,15224] [2024-11-02 12:34:25,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:34:25,926 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:34:25,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25 WrapperNode [2024-11-02 12:34:25,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:34:25,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:34:25,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:34:25,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:34:25,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:25,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:25,996 INFO L138 Inliner]: procedures = 57, calls = 103, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 214 [2024-11-02 12:34:26,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:34:26,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:34:26,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:34:26,001 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:34:26,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,029 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,038 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:34:26,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:34:26,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:34:26,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:34:26,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (1/1) ... [2024-11-02 12:34:26,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:34:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:26,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:34:26,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:34:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:34:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2024-11-02 12:34:26,139 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2024-11-02 12:34:26,140 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:34:26,140 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:34:26,141 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:34:26,141 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:34:26,141 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2024-11-02 12:34:26,141 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2024-11-02 12:34:26,142 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2024-11-02 12:34:26,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2024-11-02 12:34:26,142 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2024-11-02 12:34:26,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2024-11-02 12:34:26,143 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2024-11-02 12:34:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2024-11-02 12:34:26,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:34:26,144 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2024-11-02 12:34:26,144 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2024-11-02 12:34:26,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:34:26,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:34:26,281 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:34:26,284 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:34:26,667 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-02 12:34:26,668 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:34:26,873 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:34:26,873 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:34:26,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:34:26 BoogieIcfgContainer [2024-11-02 12:34:26,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:34:26,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:34:26,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:34:26,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:34:26,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:34:25" (1/3) ... [2024-11-02 12:34:26,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d56c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:34:26, skipping insertion in model container [2024-11-02 12:34:26,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:25" (2/3) ... [2024-11-02 12:34:26,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d56c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:34:26, skipping insertion in model container [2024-11-02 12:34:26,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:34:26" (3/3) ... [2024-11-02 12:34:26,890 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product46.cil.c [2024-11-02 12:34:26,918 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:34:26,919 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:34:27,006 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:34:27,017 INFO L333 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, 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;@33f170b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:34:27,018 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:34:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 40 states have (on average 1.4) internal successors, (56), 48 states have internal predecessors, (56), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-02 12:34:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:34:27,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:27,035 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:27,036 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:27,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 841970477, now seen corresponding path program 1 times [2024-11-02 12:34:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:27,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341833994] [2024-11-02 12:34:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:27,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:34:27,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341833994] [2024-11-02 12:34:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341833994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:27,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:27,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:34:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254200477] [2024-11-02 12:34:27,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:27,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:34:27,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:27,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:34:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:34:27,360 INFO L87 Difference]: Start difference. First operand has 64 states, 40 states have (on average 1.4) internal successors, (56), 48 states have internal predecessors, (56), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:34:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:27,451 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2024-11-02 12:34:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:34:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-02 12:34:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:27,465 INFO L225 Difference]: With dead ends: 126 [2024-11-02 12:34:27,465 INFO L226 Difference]: Without dead ends: 59 [2024-11-02 12:34:27,470 INFO L431 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 [2024-11-02 12:34:27,475 INFO L432 NwaCegarLoop]: 64 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, 64 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:27,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-02 12:34:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-02 12:34:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 44 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-02 12:34:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-11-02 12:34:27,530 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 21 [2024-11-02 12:34:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:27,532 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-11-02 12:34:27,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:34:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-11-02 12:34:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:34:27,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:27,537 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:27,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:34:27,538 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:27,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash 532820126, now seen corresponding path program 1 times [2024-11-02 12:34:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:27,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769362640] [2024-11-02 12:34:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:27,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:34:27,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769362640] [2024-11-02 12:34:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769362640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:27,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:27,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:34:27,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224815155] [2024-11-02 12:34:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:27,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:34:27,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:34:27,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:34:27,687 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:34:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:27,746 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2024-11-02 12:34:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:34:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-02 12:34:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:27,748 INFO L225 Difference]: With dead ends: 95 [2024-11-02 12:34:27,748 INFO L226 Difference]: Without dead ends: 51 [2024-11-02 12:34:27,749 INFO L431 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 [2024-11-02 12:34:27,750 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 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 [2024-11-02 12:34:27,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:34:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-02 12:34:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-02 12:34:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.3125) internal successors, (42), 39 states have internal predecessors, (42), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-02 12:34:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-11-02 12:34:27,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 22 [2024-11-02 12:34:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:27,767 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-11-02 12:34:27,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:34:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-11-02 12:34:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:34:27,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:27,770 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:27,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:34:27,771 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:27,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash -195741929, now seen corresponding path program 1 times [2024-11-02 12:34:27,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:27,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273823209] [2024-11-02 12:34:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:27,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:34:28,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:28,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273823209] [2024-11-02 12:34:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273823209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:28,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:34:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097186300] [2024-11-02 12:34:28,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:28,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:34:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:34:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:34:28,064 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:34:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:28,881 INFO L93 Difference]: Finished difference Result 192 states and 251 transitions. [2024-11-02 12:34:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-02 12:34:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-02 12:34:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:28,885 INFO L225 Difference]: With dead ends: 192 [2024-11-02 12:34:28,885 INFO L226 Difference]: Without dead ends: 143 [2024-11-02 12:34:28,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:34:28,888 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 101 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:28,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 354 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:34:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-02 12:34:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-11-02 12:34:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 102 states have internal predecessors, (113), 26 states have call successors, (26), 22 states have call predecessors, (26), 23 states have return successors, (38), 25 states have call predecessors, (38), 26 states have call successors, (38) [2024-11-02 12:34:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 177 transitions. [2024-11-02 12:34:28,935 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 177 transitions. Word has length 24 [2024-11-02 12:34:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:28,936 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 177 transitions. [2024-11-02 12:34:28,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:34:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 177 transitions. [2024-11-02 12:34:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 12:34:28,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:28,939 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:34:28,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:34:28,940 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:28,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash -426780873, now seen corresponding path program 1 times [2024-11-02 12:34:28,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689060918] [2024-11-02 12:34:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:34:29,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:29,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689060918] [2024-11-02 12:34:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689060918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:29,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:29,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:34:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671073122] [2024-11-02 12:34:29,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:29,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:34:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:34:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:34:29,356 INFO L87 Difference]: Start difference. First operand 141 states and 177 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:34:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:29,775 INFO L93 Difference]: Finished difference Result 457 states and 598 transitions. [2024-11-02 12:34:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:34:29,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-11-02 12:34:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:29,786 INFO L225 Difference]: With dead ends: 457 [2024-11-02 12:34:29,786 INFO L226 Difference]: Without dead ends: 318 [2024-11-02 12:34:29,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:34:29,793 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 143 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:29,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 225 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:34:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-02 12:34:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2024-11-02 12:34:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 176 states have (on average 1.2386363636363635) internal successors, (218), 195 states have internal predecessors, (218), 50 states have call successors, (50), 43 states have call predecessors, (50), 43 states have return successors, (77), 45 states have call predecessors, (77), 50 states have call successors, (77) [2024-11-02 12:34:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 345 transitions. [2024-11-02 12:34:29,870 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 345 transitions. Word has length 36 [2024-11-02 12:34:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:29,870 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 345 transitions. [2024-11-02 12:34:29,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:34:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 345 transitions. [2024-11-02 12:34:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-02 12:34:29,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:29,876 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:34:29,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:34:29,879 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:29,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:29,880 INFO L85 PathProgramCache]: Analyzing trace with hash -523997626, now seen corresponding path program 1 times [2024-11-02 12:34:29,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:29,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145902051] [2024-11-02 12:34:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:34:30,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145902051] [2024-11-02 12:34:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145902051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:30,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:30,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:34:30,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363715849] [2024-11-02 12:34:30,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:30,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:34:30,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:34:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:34:30,246 INFO L87 Difference]: Start difference. First operand 270 states and 345 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 12:34:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:31,003 INFO L93 Difference]: Finished difference Result 660 states and 872 transitions. [2024-11-02 12:34:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:34:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2024-11-02 12:34:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:31,011 INFO L225 Difference]: With dead ends: 660 [2024-11-02 12:34:31,013 INFO L226 Difference]: Without dead ends: 502 [2024-11-02 12:34:31,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:34:31,017 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 143 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:31,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 331 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:34:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2024-11-02 12:34:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2024-11-02 12:34:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 301 states have (on average 1.2358803986710964) internal successors, (372), 334 states have internal predecessors, (372), 82 states have call successors, (82), 66 states have call predecessors, (82), 72 states have return successors, (131), 79 states have call predecessors, (131), 82 states have call successors, (131) [2024-11-02 12:34:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 585 transitions. [2024-11-02 12:34:31,124 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 585 transitions. Word has length 39 [2024-11-02 12:34:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:31,125 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 585 transitions. [2024-11-02 12:34:31,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 12:34:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 585 transitions. [2024-11-02 12:34:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-02 12:34:31,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:31,137 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:31,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:34:31,138 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:31,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2107567404, now seen corresponding path program 1 times [2024-11-02 12:34:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123906447] [2024-11-02 12:34:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:31,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:34:31,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123906447] [2024-11-02 12:34:31,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123906447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357643691] [2024-11-02 12:34:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:31,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:31,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:34:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:31,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:34:31,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:34:31,559 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:34:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357643691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:31,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:34:31,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-11-02 12:34:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587889536] [2024-11-02 12:34:31,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:31,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:34:31,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:34:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:34:31,566 INFO L87 Difference]: Start difference. First operand 456 states and 585 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:34:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:31,688 INFO L93 Difference]: Finished difference Result 841 states and 1094 transitions. [2024-11-02 12:34:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:34:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2024-11-02 12:34:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:31,694 INFO L225 Difference]: With dead ends: 841 [2024-11-02 12:34:31,694 INFO L226 Difference]: Without dead ends: 401 [2024-11-02 12:34:31,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:34:31,699 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:31,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:34:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-02 12:34:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2024-11-02 12:34:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 258 states have (on average 1.2054263565891472) internal successors, (311), 289 states have internal predecessors, (311), 73 states have call successors, (73), 62 states have call predecessors, (73), 65 states have return successors, (114), 67 states have call predecessors, (114), 73 states have call successors, (114) [2024-11-02 12:34:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 498 transitions. [2024-11-02 12:34:31,793 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 498 transitions. Word has length 56 [2024-11-02 12:34:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:31,794 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 498 transitions. [2024-11-02 12:34:31,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:34:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 498 transitions. [2024-11-02 12:34:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 12:34:31,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:31,798 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-02 12:34:31,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:34:31,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:32,000 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:32,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash -7304278, now seen corresponding path program 1 times [2024-11-02 12:34:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711520140] [2024-11-02 12:34:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:32,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:34:32,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711520140] [2024-11-02 12:34:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711520140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675532688] [2024-11-02 12:34:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:32,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:32,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:32,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:34:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:32,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 12:34:32,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:34:32,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:34:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675532688] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:32,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818143969] [2024-11-02 12:34:32,718 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2024-11-02 12:34:32,718 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:32,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:34:32,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:34:32,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:34:34,757 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 22 for LOIs [2024-11-02 12:34:34,764 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 12 for LOIs [2024-11-02 12:34:34,929 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 5 for LOIs [2024-11-02 12:34:34,930 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 11 for LOIs [2024-11-02 12:34:35,014 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 25 for LOIs [2024-11-02 12:34:35,023 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:34:38,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6411#(and (not (= ~pumpRunning~0 0)) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (not (= 2 ~waterLevel~0)) (<= |old(~pumpRunning~0)| 2147483647) (<= 0 (+ ~waterLevel~0 2147483648)) (<= ~waterLevel~0 2147483647) (<= 0 ~pumpRunning~0) (<= ~methaneLevelCritical~0 2147483647) (<= 0 (+ ~methaneLevelCritical~0 2147483648)) (= ~switchedOnBeforeTS~0 0))' at error location [2024-11-02 12:34:38,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:34:38,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:38,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-02 12:34:38,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990660078] [2024-11-02 12:34:38,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:38,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:34:38,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:34:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2024-11-02 12:34:38,208 INFO L87 Difference]: Start difference. First operand 397 states and 498 transitions. Second operand has 13 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-02 12:34:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:40,947 INFO L93 Difference]: Finished difference Result 1767 states and 2333 transitions. [2024-11-02 12:34:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-02 12:34:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 63 [2024-11-02 12:34:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:40,960 INFO L225 Difference]: With dead ends: 1767 [2024-11-02 12:34:40,960 INFO L226 Difference]: Without dead ends: 1363 [2024-11-02 12:34:40,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=459, Invalid=5703, Unknown=0, NotChecked=0, Total=6162 [2024-11-02 12:34:40,966 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 253 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:40,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1125 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-02 12:34:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2024-11-02 12:34:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1190. [2024-11-02 12:34:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 772 states have (on average 1.1683937823834196) internal successors, (902), 855 states have internal predecessors, (902), 211 states have call successors, (211), 189 states have call predecessors, (211), 206 states have return successors, (340), 203 states have call predecessors, (340), 211 states have call successors, (340) [2024-11-02 12:34:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1453 transitions. [2024-11-02 12:34:41,138 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1453 transitions. Word has length 63 [2024-11-02 12:34:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:41,139 INFO L471 AbstractCegarLoop]: Abstraction has 1190 states and 1453 transitions. [2024-11-02 12:34:41,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-02 12:34:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1453 transitions. [2024-11-02 12:34:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-02 12:34:41,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:41,144 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:41,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:34:41,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:34:41,346 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:41,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash -727427545, now seen corresponding path program 1 times [2024-11-02 12:34:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670189824] [2024-11-02 12:34:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 12:34:41,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:41,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670189824] [2024-11-02 12:34:41,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670189824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:41,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438931460] [2024-11-02 12:34:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:41,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:41,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a757dc-db96-4884-82e9-033df2a3ead4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:34:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:41,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 12:34:41,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:34:42,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:34:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438931460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:43,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208835967] [2024-11-02 12:34:43,289 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2024-11-02 12:34:43,289 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:43,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:34:43,290 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:34:43,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:34:46,757 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 28 for LOIs [2024-11-02 12:34:46,764 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 13 for LOIs [2024-11-02 12:34:46,836 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 26 for LOIs [2024-11-02 12:34:46,841 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 11 for LOIs [2024-11-02 12:34:46,891 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 12 for LOIs [2024-11-02 12:34:46,893 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 19 for LOIs [2024-11-02 12:34:46,897 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 12 for LOIs [2024-11-02 12:34:46,899 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:34:49,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11561#(and (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 1) (not (= 2 ~waterLevel~0)) (= |old(~pumpRunning~0)| 0) (<= 0 (+ ~waterLevel~0 2147483648)) (<= ~waterLevel~0 2147483647) (= |old(~waterLevel~0)| ~waterLevel~0) (<= 0 ~pumpRunning~0) (= ~switchedOnBeforeTS~0 0) (not (= 0 ~systemActive~0)) (= |old(~switchedOnBeforeTS~0)| 0))' at error location [2024-11-02 12:34:49,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:34:49,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:49,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 27 [2024-11-02 12:34:49,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234999329] [2024-11-02 12:34:49,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:49,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-02 12:34:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-02 12:34:49,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2024-11-02 12:34:49,410 INFO L87 Difference]: Start difference. First operand 1190 states and 1453 transitions. Second operand has 27 states, 22 states have (on average 5.318181818181818) internal successors, (117), 24 states have internal predecessors, (117), 12 states have call successors, (33), 9 states have call predecessors, (33), 14 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32)