./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec1_product60.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/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_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec1_product60.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/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_adc24ee4-ed70-452a-9b24-bdc68141c6fe/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 0fa225959be52b1defd5d055d32ae3a8dd944c37a01adb589e2f547028e60f67 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:47,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:47,567 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:47,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:47,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:47,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:47,612 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:47,612 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:47,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:47,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:47,614 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:47,614 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:47,615 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:47,615 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:47,616 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:47,616 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:47,618 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:47,618 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:47,619 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:47,621 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:47,622 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:47,623 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:47,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:47,627 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:47,628 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:47,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:47,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:47,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:47,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:47,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:47,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:47,630 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:47,630 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:47,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:47,643 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:47,644 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:47,645 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:47,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:47,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:47,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:47,647 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:47,647 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:47,647 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:47,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:47,648 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:47,649 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:47,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:47,649 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_adc24ee4-ed70-452a-9b24-bdc68141c6fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0fa225959be52b1defd5d055d32ae3a8dd944c37a01adb589e2f547028e60f67 [2024-11-02 11:25:47,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:48,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:48,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:48,021 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:48,022 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:48,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/minepump_spec1_product60.cil.c Unable to find full path for "g++" [2024-11-02 11:25:50,217 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:50,543 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:50,547 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/sv-benchmarks/c/product-lines/minepump_spec1_product60.cil.c [2024-11-02 11:25:50,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/data/b2120602b/7f64b32275ea4a59b40b38029aeff76c/FLAG8277a5d77 [2024-11-02 11:25:50,588 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/data/b2120602b/7f64b32275ea4a59b40b38029aeff76c [2024-11-02 11:25:50,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:50,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:50,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:50,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:50,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:50,605 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:50" (1/1) ... [2024-11-02 11:25:50,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6998e972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:50, skipping insertion in model container [2024-11-02 11:25:50,607 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:50" (1/1) ... [2024-11-02 11:25:50,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:51,143 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_adc24ee4-ed70-452a-9b24-bdc68141c6fe/sv-benchmarks/c/product-lines/minepump_spec1_product60.cil.c[14569,14582] [2024-11-02 11:25:51,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:51,198 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:51,209 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] [2024-11-02 11:25:51,211 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [153] [2024-11-02 11:25:51,211 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [262] [2024-11-02 11:25:51,211 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [290] [2024-11-02 11:25:51,211 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [656] [2024-11-02 11:25:51,212 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [665] [2024-11-02 11:25:51,212 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [736] [2024-11-02 11:25:51,212 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [976] [2024-11-02 11:25:51,291 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_adc24ee4-ed70-452a-9b24-bdc68141c6fe/sv-benchmarks/c/product-lines/minepump_spec1_product60.cil.c[14569,14582] [2024-11-02 11:25:51,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:51,333 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:51,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51 WrapperNode [2024-11-02 11:25:51,334 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:51,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:51,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:51,336 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:51,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,367 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,411 INFO L138 Inliner]: procedures = 58, calls = 103, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 221 [2024-11-02 11:25:51,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:51,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:51,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:51,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:51,429 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,432 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,443 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,449 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:51,450 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:51,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:51,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:51,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (1/1) ... [2024-11-02 11:25:51,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:51,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:51,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:25:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2024-11-02 11:25:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2024-11-02 11:25:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2024-11-02 11:25:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2024-11-02 11:25:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 11:25:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 11:25:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 11:25:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 11:25:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2024-11-02 11:25:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2024-11-02 11:25:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2024-11-02 11:25:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2024-11-02 11:25:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2024-11-02 11:25:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2024-11-02 11:25:51,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:25:51,546 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2024-11-02 11:25:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2024-11-02 11:25:51,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:51,640 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:51,642 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:51,954 INFO L? ?]: Removed 49 outVars from TransFormulas that were not future-live. [2024-11-02 11:25:51,955 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:52,117 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:52,117 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 11:25:52,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:52 BoogieIcfgContainer [2024-11-02 11:25:52,118 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:52,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:52,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:52,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:52,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:50" (1/3) ... [2024-11-02 11:25:52,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3b1ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:52, skipping insertion in model container [2024-11-02 11:25:52,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:51" (2/3) ... [2024-11-02 11:25:52,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3b1ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:52, skipping insertion in model container [2024-11-02 11:25:52,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:52" (3/3) ... [2024-11-02 11:25:52,126 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product60.cil.c [2024-11-02 11:25:52,162 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:52,162 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:25:52,240 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:52,246 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;@cab6fab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:52,246 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:25:52,249 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) [2024-11-02 11:25:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 11:25:52,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:52,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:52,259 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:52,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1693987261, now seen corresponding path program 1 times [2024-11-02 11:25:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:52,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872393454] [2024-11-02 11:25:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:52,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872393454] [2024-11-02 11:25:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872393454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:52,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:25:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083937668] [2024-11-02 11:25:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:52,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 11:25:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 11:25:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:25:52,510 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:52,590 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2024-11-02 11:25:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 11:25:52,593 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-02 11:25:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:52,603 INFO L225 Difference]: With dead ends: 128 [2024-11-02 11:25:52,604 INFO L226 Difference]: Without dead ends: 60 [2024-11-02 11:25:52,608 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 11:25:52,612 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:52,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:25:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-02 11:25:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-02 11:25:52,666 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) [2024-11-02 11:25:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2024-11-02 11:25:52,672 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 16 [2024-11-02 11:25:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:52,674 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2024-11-02 11:25:52,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2024-11-02 11:25:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 11:25:52,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:52,678 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:52,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:25:52,679 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:52,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash -237819326, now seen corresponding path program 1 times [2024-11-02 11:25:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:52,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750118970] [2024-11-02 11:25:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:52,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:52,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750118970] [2024-11-02 11:25:52,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750118970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:52,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:52,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784172867] [2024-11-02 11:25:52,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:52,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:52,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:52,845 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:52,896 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2024-11-02 11:25:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-02 11:25:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:52,898 INFO L225 Difference]: With dead ends: 92 [2024-11-02 11:25:52,899 INFO L226 Difference]: Without dead ends: 52 [2024-11-02 11:25:52,899 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 11:25:52,901 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:52,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:25:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-02 11:25:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-02 11:25:52,909 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) [2024-11-02 11:25:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-11-02 11:25:52,910 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 17 [2024-11-02 11:25:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:52,911 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-11-02 11:25:52,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-11-02 11:25:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 11:25:52,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:52,912 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:52,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:25:52,913 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:52,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1455549560, now seen corresponding path program 1 times [2024-11-02 11:25:52,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:52,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406238400] [2024-11-02 11:25:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:52,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:53,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:53,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406238400] [2024-11-02 11:25:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406238400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:53,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:53,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:53,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498953573] [2024-11-02 11:25:53,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:53,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:53,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:53,007 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:53,097 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2024-11-02 11:25:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-11-02 11:25:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:53,101 INFO L225 Difference]: With dead ends: 152 [2024-11-02 11:25:53,101 INFO L226 Difference]: Without dead ends: 102 [2024-11-02 11:25:53,102 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 11:25:53,103 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 61 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:53,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 112 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-02 11:25:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2024-11-02 11:25:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 77 states have internal predecessors, (85), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 15 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-02 11:25:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2024-11-02 11:25:53,153 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 20 [2024-11-02 11:25:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:53,153 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2024-11-02 11:25:53,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2024-11-02 11:25:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-02 11:25:53,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:53,155 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:53,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:25:53,157 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:53,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1879029371, now seen corresponding path program 1 times [2024-11-02 11:25:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651534671] [2024-11-02 11:25:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:53,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:53,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651534671] [2024-11-02 11:25:53,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651534671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:53,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:53,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103631296] [2024-11-02 11:25:53,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:53,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:25:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:25:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:53,354 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:53,512 INFO L93 Difference]: Finished difference Result 266 states and 355 transitions. [2024-11-02 11:25:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:25:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-11-02 11:25:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:53,515 INFO L225 Difference]: With dead ends: 266 [2024-11-02 11:25:53,519 INFO L226 Difference]: Without dead ends: 169 [2024-11-02 11:25:53,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:25:53,522 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 36 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:53,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 137 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-02 11:25:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2024-11-02 11:25:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 126 states have internal predecessors, (145), 30 states have call successors, (30), 26 states have call predecessors, (30), 26 states have return successors, (38), 27 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-02 11:25:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 213 transitions. [2024-11-02 11:25:53,577 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 213 transitions. Word has length 23 [2024-11-02 11:25:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:53,581 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 213 transitions. [2024-11-02 11:25:53,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:25:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 213 transitions. [2024-11-02 11:25:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 11:25:53,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:53,586 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] [2024-11-02 11:25:53,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:25:53,587 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:53,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1700230723, now seen corresponding path program 1 times [2024-11-02 11:25:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:53,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072661019] [2024-11-02 11:25:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:53,977 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 11:25:53,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072661019] [2024-11-02 11:25:53,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072661019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:53,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:53,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:25:53,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987677814] [2024-11-02 11:25:53,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:53,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:25:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:25:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:25:53,984 INFO L87 Difference]: Start difference. First operand 168 states and 213 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:25:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:54,274 INFO L93 Difference]: Finished difference Result 481 states and 609 transitions. [2024-11-02 11:25:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:25:54,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2024-11-02 11:25:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:54,279 INFO L225 Difference]: With dead ends: 481 [2024-11-02 11:25:54,279 INFO L226 Difference]: Without dead ends: 315 [2024-11-02 11:25:54,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 11:25:54,282 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 101 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:54,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 234 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:25:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-02 11:25:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 298. [2024-11-02 11:25:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 201 states have (on average 1.2885572139303483) internal successors, (259), 221 states have internal predecessors, (259), 47 states have call successors, (47), 45 states have call predecessors, (47), 49 states have return successors, (59), 47 states have call predecessors, (59), 47 states have call successors, (59) [2024-11-02 11:25:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 365 transitions. [2024-11-02 11:25:54,337 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 365 transitions. Word has length 32 [2024-11-02 11:25:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:54,338 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 365 transitions. [2024-11-02 11:25:54,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:25:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 365 transitions. [2024-11-02 11:25:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 11:25:54,341 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:54,341 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] [2024-11-02 11:25:54,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:25:54,342 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:54,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash -893971849, now seen corresponding path program 1 times [2024-11-02 11:25:54,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:54,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755889831] [2024-11-02 11:25:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:25:54,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755889831] [2024-11-02 11:25:54,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755889831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:54,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:54,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:25:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701888260] [2024-11-02 11:25:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:54,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:25:54,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:54,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:25:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:25:54,592 INFO L87 Difference]: Start difference. First operand 298 states and 365 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 11:25:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:54,850 INFO L93 Difference]: Finished difference Result 872 states and 1090 transitions. [2024-11-02 11:25:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:25:54,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-02 11:25:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:54,855 INFO L225 Difference]: With dead ends: 872 [2024-11-02 11:25:54,856 INFO L226 Difference]: Without dead ends: 576 [2024-11-02 11:25:54,857 INFO L431 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 [2024-11-02 11:25:54,858 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 42 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:54,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 226 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-11-02 11:25:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 560. [2024-11-02 11:25:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 383 states have (on average 1.2715404699738904) internal successors, (487), 414 states have internal predecessors, (487), 86 states have call successors, (86), 82 states have call predecessors, (86), 90 states have return successors, (110), 86 states have call predecessors, (110), 86 states have call successors, (110) [2024-11-02 11:25:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2024-11-02 11:25:54,926 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 35 [2024-11-02 11:25:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:54,926 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2024-11-02 11:25:54,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 11:25:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2024-11-02 11:25:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-02 11:25:54,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:54,930 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] [2024-11-02 11:25:54,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:25:54,930 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:54,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash 605602311, now seen corresponding path program 1 times [2024-11-02 11:25:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864838599] [2024-11-02 11:25:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:55,326 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 11:25:55,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:55,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864838599] [2024-11-02 11:25:55,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864838599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:55,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-02 11:25:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636029991] [2024-11-02 11:25:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:55,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 11:25:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 11:25:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-02 11:25:55,332 INFO L87 Difference]: Start difference. First operand 560 states and 683 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 11:25:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:56,420 INFO L93 Difference]: Finished difference Result 1121 states and 1487 transitions. [2024-11-02 11:25:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-02 11:25:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2024-11-02 11:25:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:56,433 INFO L225 Difference]: With dead ends: 1121 [2024-11-02 11:25:56,433 INFO L226 Difference]: Without dead ends: 895 [2024-11-02 11:25:56,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2024-11-02 11:25:56,437 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 277 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:56,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 227 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 11:25:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2024-11-02 11:25:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 715. [2024-11-02 11:25:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 491 states have (on average 1.274949083503055) internal successors, (626), 529 states have internal predecessors, (626), 110 states have call successors, (110), 98 states have call predecessors, (110), 113 states have return successors, (155), 112 states have call predecessors, (155), 110 states have call successors, (155) [2024-11-02 11:25:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 891 transitions. [2024-11-02 11:25:56,610 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 891 transitions. Word has length 38 [2024-11-02 11:25:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:56,611 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 891 transitions. [2024-11-02 11:25:56,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-02 11:25:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 891 transitions. [2024-11-02 11:25:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-02 11:25:56,617 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:56,617 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, 1, 1, 1, 1] [2024-11-02 11:25:56,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:25:56,619 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:56,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1829923219, now seen corresponding path program 1 times [2024-11-02 11:25:56,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:56,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180299498] [2024-11-02 11:25:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:56,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:25:56,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180299498] [2024-11-02 11:25:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180299498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:56,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233225209] [2024-11-02 11:25:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:56,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:25:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:25:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:56,691 INFO L87 Difference]: Start difference. First operand 715 states and 891 transitions. Second operand has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-02 11:25:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:56,903 INFO L93 Difference]: Finished difference Result 1164 states and 1448 transitions. [2024-11-02 11:25:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:25:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 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 60 [2024-11-02 11:25:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:56,908 INFO L225 Difference]: With dead ends: 1164 [2024-11-02 11:25:56,908 INFO L226 Difference]: Without dead ends: 451 [2024-11-02 11:25:56,910 INFO L431 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 [2024-11-02 11:25:56,911 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 85 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:56,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 116 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-02 11:25:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 443. [2024-11-02 11:25:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 309 states have (on average 1.2588996763754046) internal successors, (389), 332 states have internal predecessors, (389), 66 states have call successors, (66), 60 states have call predecessors, (66), 67 states have return successors, (85), 67 states have call predecessors, (85), 66 states have call successors, (85) [2024-11-02 11:25:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 540 transitions. [2024-11-02 11:25:57,002 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 540 transitions. Word has length 60 [2024-11-02 11:25:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:57,003 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 540 transitions. [2024-11-02 11:25:57,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-02 11:25:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 540 transitions. [2024-11-02 11:25:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-02 11:25:57,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:57,006 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:57,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 11:25:57,007 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:57,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1364689831, now seen corresponding path program 1 times [2024-11-02 11:25:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:57,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653531014] [2024-11-02 11:25:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:57,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 11:25:57,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:57,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653531014] [2024-11-02 11:25:57,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653531014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789918001] [2024-11-02 11:25:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:57,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:57,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:57,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:57,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:25:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:57,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 11:25:57,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 11:25:58,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 11:25:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789918001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:25:58,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328870474] [2024-11-02 11:25:58,809 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2024-11-02 11:25:58,809 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:25:58,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:25:58,832 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:25:58,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:02,715 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 135 for LOIs [2024-11-02 11:26:02,819 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2024-11-02 11:26:02,996 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 32 for LOIs [2024-11-02 11:26:03,127 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 28 for LOIs [2024-11-02 11:26:03,138 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 19 for LOIs [2024-11-02 11:26:03,144 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2024-11-02 11:26:03,148 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:07,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10502#(and (<= ~methaneLevelCritical~0 1) (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 2147483647) (= 1 ~systemActive~0) (not (= ~methaneLevelCritical~0 0)) (<= 0 ~methaneLevelCritical~0) (<= 0 (+ ~pumpRunning~0 2147483648)))' at error location [2024-11-02 11:26:07,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:07,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:07,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-11-02 11:26:07,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428949165] [2024-11-02 11:26:07,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:07,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-02 11:26:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-02 11:26:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2629, Unknown=0, NotChecked=0, Total=2970 [2024-11-02 11:26:07,025 INFO L87 Difference]: Start difference. First operand 443 states and 540 transitions. Second operand has 25 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-11-02 11:26:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:09,103 INFO L93 Difference]: Finished difference Result 1446 states and 1832 transitions. [2024-11-02 11:26:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-02 11:26:09,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 67 [2024-11-02 11:26:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:09,112 INFO L225 Difference]: With dead ends: 1446 [2024-11-02 11:26:09,113 INFO L226 Difference]: Without dead ends: 1115 [2024-11-02 11:26:09,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 160 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=962, Invalid=5680, Unknown=0, NotChecked=0, Total=6642 [2024-11-02 11:26:09,118 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 669 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:09,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 572 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 11:26:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2024-11-02 11:26:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1010. [2024-11-02 11:26:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 705 states have (on average 1.252482269503546) internal successors, (883), 762 states have internal predecessors, (883), 150 states have call successors, (150), 129 states have call predecessors, (150), 154 states have return successors, (216), 162 states have call predecessors, (216), 150 states have call successors, (216) [2024-11-02 11:26:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1249 transitions. [2024-11-02 11:26:09,250 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1249 transitions. Word has length 67 [2024-11-02 11:26:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:09,252 INFO L471 AbstractCegarLoop]: Abstraction has 1010 states and 1249 transitions. [2024-11-02 11:26:09,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 11 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-11-02 11:26:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1249 transitions. [2024-11-02 11:26:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-02 11:26:09,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:09,259 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-02 11:26:09,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 11:26:09,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:09,460 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:09,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 935000358, now seen corresponding path program 1 times [2024-11-02 11:26:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149909360] [2024-11-02 11:26:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-02 11:26:10,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:10,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149909360] [2024-11-02 11:26:10,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149909360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:10,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864007828] [2024-11-02 11:26:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:10,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:10,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:10,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:10,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc24ee4-ed70-452a-9b24-bdc68141c6fe/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:26:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:10,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-02 11:26:10,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 11:26:11,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-02 11:26:12,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864007828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:12,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363380635] [2024-11-02 11:26:12,076 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2024-11-02 11:26:12,077 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:12,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:12,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:12,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:15,110 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 135 for LOIs [2024-11-02 11:26:15,154 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2024-11-02 11:26:15,312 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 32 for LOIs [2024-11-02 11:26:15,394 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 28 for LOIs [2024-11-02 11:26:15,399 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 19 for LOIs [2024-11-02 11:26:15,402 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2024-11-02 11:26:15,405 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 26 for LOIs [2024-11-02 11:26:15,408 INFO L180 IcfgInterpreter]: Interpretation finished