./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product59.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product59.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ --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 68cd47586ea836a40d34f69dc7bca714ffc0af5c5bf2f7fbd8cfbbd6f1019685 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:05:53,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:05:53,570 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:05:53,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:05:53,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:05:53,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:05:53,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:05:53,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:05:53,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:05:53,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:05:53,640 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:05:53,641 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:05:53,642 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:05:53,644 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:05:53,644 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:05:53,645 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:05:53,645 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:05:53,646 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:05:53,646 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:05:53,647 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:05:53,647 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:05:53,648 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:05:53,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:05:53,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:05:53,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:05:53,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:05:53,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:05:53,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:05:53,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:05:53,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:05:53,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:05:53,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:05:53,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:05:53,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:05:53,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:05:53,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:05:53,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:53,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:05:53,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:05:53,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:05:53,658 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:05:53,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:05:53,659 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:05:53,659 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:05:53,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:05:53,660 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_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68cd47586ea836a40d34f69dc7bca714ffc0af5c5bf2f7fbd8cfbbd6f1019685 [2023-11-19 05:05:54,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:05:54,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:05:54,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:05:54,085 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:05:54,086 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:05:54,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec4_product59.cil.c [2023-11-19 05:05:57,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:05:57,925 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:05:57,926 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/sv-benchmarks/c/product-lines/minepump_spec4_product59.cil.c [2023-11-19 05:05:57,943 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/data/cf20cfa54/f39d584f25c5439eb914e83e96bdc98e/FLAGaaf89327b [2023-11-19 05:05:57,961 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/data/cf20cfa54/f39d584f25c5439eb914e83e96bdc98e [2023-11-19 05:05:57,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:05:57,966 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:05:57,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:57,969 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:05:57,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:05:57,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:57" (1/1) ... [2023-11-19 05:05:57,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5488e552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:57, skipping insertion in model container [2023-11-19 05:05:57,978 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:57" (1/1) ... [2023-11-19 05:05:58,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:05:58,381 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/sv-benchmarks/c/product-lines/minepump_spec4_product59.cil.c[9171,9184] [2023-11-19 05:05:58,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:58,466 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:05:58,479 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [49] [2023-11-19 05:05:58,481 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [87] [2023-11-19 05:05:58,481 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [116] [2023-11-19 05:05:58,482 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [188] [2023-11-19 05:05:58,482 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [426] [2023-11-19 05:05:58,482 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [522] [2023-11-19 05:05:58,483 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [625] [2023-11-19 05:05:58,483 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [634] [2023-11-19 05:05:58,519 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/sv-benchmarks/c/product-lines/minepump_spec4_product59.cil.c[9171,9184] [2023-11-19 05:05:58,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:58,596 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:05:58,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58 WrapperNode [2023-11-19 05:05:58,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:58,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:58,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:05:58,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:05:58,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,645 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,684 INFO L138 Inliner]: procedures = 57, calls = 102, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 230 [2023-11-19 05:05:58,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:58,686 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:05:58,686 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:05:58,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:05:58,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,713 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,757 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:05:58,759 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:05:58,759 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:05:58,759 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:05:58,760 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (1/1) ... [2023-11-19 05:05:58,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:58,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:58,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:05:58,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:05:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:05:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 05:05:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 05:05:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:05:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:05:58,853 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:05:58,853 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:05:58,855 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 05:05:58,855 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 05:05:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 05:05:58,856 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 05:05:58,856 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 05:05:58,857 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 05:05:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:05:58,857 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 05:05:58,857 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 05:05:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:05:58,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:05:58,954 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:05:58,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:05:59,379 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:05:59,575 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:05:59,575 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:05:59,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:59 BoogieIcfgContainer [2023-11-19 05:05:59,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:05:59,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:05:59,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:05:59,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:05:59,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:05:57" (1/3) ... [2023-11-19 05:05:59,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f0b932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:59, skipping insertion in model container [2023-11-19 05:05:59,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:58" (2/3) ... [2023-11-19 05:05:59,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f0b932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:59, skipping insertion in model container [2023-11-19 05:05:59,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:59" (3/3) ... [2023-11-19 05:05:59,591 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product59.cil.c [2023-11-19 05:05:59,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:05:59,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:05:59,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:05:59,688 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6229cde8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:05:59,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:05:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 05:05:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 05:05:59,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:59,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:59,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:05:59,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1479093644, now seen corresponding path program 1 times [2023-11-19 05:05:59,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86708376] [2023-11-19 05:05:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:59,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:59,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86708376] [2023-11-19 05:05:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86708376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:59,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:59,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178081646] [2023-11-19 05:05:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:59,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:05:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:05:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:05:59,991 INFO L87 Difference]: Start difference. First operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:00,130 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2023-11-19 05:06:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:06:00,136 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 05:06:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:00,149 INFO L225 Difference]: With dead ends: 116 [2023-11-19 05:06:00,149 INFO L226 Difference]: Without dead ends: 54 [2023-11-19 05:06:00,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:06:00,163 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:00,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-19 05:06:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-19 05:06:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 43 states have internal predecessors, (48), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 05:06:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2023-11-19 05:06:00,231 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 12 [2023-11-19 05:06:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:00,232 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2023-11-19 05:06:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2023-11-19 05:06:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 05:06:00,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:00,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:00,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:06:00,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:00,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1288787267, now seen corresponding path program 1 times [2023-11-19 05:06:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:00,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463310688] [2023-11-19 05:06:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:00,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463310688] [2023-11-19 05:06:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463310688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375283320] [2023-11-19 05:06:00,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:00,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:06:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:06:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:00,380 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:00,466 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2023-11-19 05:06:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:06:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 05:06:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:00,471 INFO L225 Difference]: With dead ends: 80 [2023-11-19 05:06:00,471 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 05:06:00,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:06:00,474 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:00,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 05:06:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-19 05:06:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.4) internal successors, (42), 38 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:06:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-11-19 05:06:00,487 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 13 [2023-11-19 05:06:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:00,488 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-11-19 05:06:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-11-19 05:06:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:06:00,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:00,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:06:00,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:00,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 504502520, now seen corresponding path program 1 times [2023-11-19 05:06:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:00,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558064887] [2023-11-19 05:06:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:00,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:00,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558064887] [2023-11-19 05:06:00,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558064887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:00,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:00,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:00,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930073726] [2023-11-19 05:06:00,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:00,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:00,752 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:00,964 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2023-11-19 05:06:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:06:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 05:06:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:00,968 INFO L225 Difference]: With dead ends: 133 [2023-11-19 05:06:00,968 INFO L226 Difference]: Without dead ends: 89 [2023-11-19 05:06:00,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:06:00,970 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:00,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 118 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-19 05:06:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2023-11-19 05:06:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 59 states have internal predecessors, (67), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14) [2023-11-19 05:06:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-11-19 05:06:01,017 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 16 [2023-11-19 05:06:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:01,017 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-11-19 05:06:01,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-11-19 05:06:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:06:01,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:01,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:06:01,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:01,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -220924132, now seen corresponding path program 1 times [2023-11-19 05:06:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412721799] [2023-11-19 05:06:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:01,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412721799] [2023-11-19 05:06:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412721799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:01,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:01,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:06:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780030696] [2023-11-19 05:06:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:06:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:06:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:06:01,231 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:01,418 INFO L93 Difference]: Finished difference Result 222 states and 298 transitions. [2023-11-19 05:06:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:06:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 05:06:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:01,426 INFO L225 Difference]: With dead ends: 222 [2023-11-19 05:06:01,426 INFO L226 Difference]: Without dead ends: 152 [2023-11-19 05:06:01,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:06:01,437 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 71 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:01,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 156 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-19 05:06:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2023-11-19 05:06:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 116 states have internal predecessors, (135), 21 states have call successors, (21), 18 states have call predecessors, (21), 20 states have return successors, (26), 19 states have call predecessors, (26), 21 states have call successors, (26) [2023-11-19 05:06:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2023-11-19 05:06:01,505 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 19 [2023-11-19 05:06:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:01,505 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2023-11-19 05:06:01,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2023-11-19 05:06:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:06:01,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:01,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:01,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:06:01,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:01,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1685104341, now seen corresponding path program 1 times [2023-11-19 05:06:01,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:01,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313418901] [2023-11-19 05:06:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:01,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:01,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313418901] [2023-11-19 05:06:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313418901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:01,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:01,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:06:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054572402] [2023-11-19 05:06:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:01,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:06:01,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:06:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:06:01,983 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-19 05:06:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:02,573 INFO L93 Difference]: Finished difference Result 396 states and 525 transitions. [2023-11-19 05:06:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:06:02,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22 [2023-11-19 05:06:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:02,584 INFO L225 Difference]: With dead ends: 396 [2023-11-19 05:06:02,585 INFO L226 Difference]: Without dead ends: 326 [2023-11-19 05:06:02,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:06:02,591 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 196 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:02,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 261 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:06:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-19 05:06:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2023-11-19 05:06:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 207 states have (on average 1.3043478260869565) internal successors, (270), 234 states have internal predecessors, (270), 42 states have call successors, (42), 36 states have call predecessors, (42), 41 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-19 05:06:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 367 transitions. [2023-11-19 05:06:02,679 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 367 transitions. Word has length 22 [2023-11-19 05:06:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:02,681 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 367 transitions. [2023-11-19 05:06:02,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-19 05:06:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 367 transitions. [2023-11-19 05:06:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:06:02,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:02,688 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:06:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:06:02,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:02,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1443951684, now seen corresponding path program 1 times [2023-11-19 05:06:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409580994] [2023-11-19 05:06:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:03,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409580994] [2023-11-19 05:06:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409580994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993269381] [2023-11-19 05:06:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:03,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:03,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:06:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:03,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 05:06:03,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:04,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:06:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993269381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:04,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:06:04,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-11-19 05:06:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689462764] [2023-11-19 05:06:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:06:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:06:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:06:04,044 INFO L87 Difference]: Start difference. First operand 291 states and 367 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:06:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:04,818 INFO L93 Difference]: Finished difference Result 809 states and 1034 transitions. [2023-11-19 05:06:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:06:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2023-11-19 05:06:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:04,823 INFO L225 Difference]: With dead ends: 809 [2023-11-19 05:06:04,824 INFO L226 Difference]: Without dead ends: 569 [2023-11-19 05:06:04,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:06:04,826 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 139 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:04,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 363 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:06:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2023-11-19 05:06:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 525. [2023-11-19 05:06:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 370 states have (on average 1.3135135135135134) internal successors, (486), 417 states have internal predecessors, (486), 78 states have call successors, (78), 65 states have call predecessors, (78), 76 states have return successors, (108), 72 states have call predecessors, (108), 78 states have call successors, (108) [2023-11-19 05:06:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 672 transitions. [2023-11-19 05:06:04,959 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 672 transitions. Word has length 44 [2023-11-19 05:06:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:04,959 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 672 transitions. [2023-11-19 05:06:04,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:06:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 672 transitions. [2023-11-19 05:06:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:06:04,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:04,965 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:06:04,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:05,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:05,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:05,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1835839965, now seen corresponding path program 1 times [2023-11-19 05:06:05,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:05,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772424895] [2023-11-19 05:06:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:05,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:05,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772424895] [2023-11-19 05:06:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772424895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:05,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999329136] [2023-11-19 05:06:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:05,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:05,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:05,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:06:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:05,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 05:06:05,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:06,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:06:06,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999329136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:06,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623682678] [2023-11-19 05:06:06,703 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-19 05:06:06,703 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:06,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:06,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:06,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:06:11,160 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 49 for LOIs [2023-11-19 05:06:11,176 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2023-11-19 05:06:11,449 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 19 for LOIs [2023-11-19 05:06:11,526 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 23 for LOIs [2023-11-19 05:06:11,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:14,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4356#(and (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= 0 ~pumpRunning~0) (= ~waterLevel~0 0))' at error location [2023-11-19 05:06:14,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:06:14,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-11-19 05:06:14,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192982938] [2023-11-19 05:06:14,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:14,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 05:06:14,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 05:06:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2166, Unknown=0, NotChecked=0, Total=2450 [2023-11-19 05:06:14,029 INFO L87 Difference]: Start difference. First operand 525 states and 672 transitions. Second operand has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-19 05:06:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:17,265 INFO L93 Difference]: Finished difference Result 1516 states and 2095 transitions. [2023-11-19 05:06:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-19 05:06:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) Word has length 47 [2023-11-19 05:06:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:17,287 INFO L225 Difference]: With dead ends: 1516 [2023-11-19 05:06:17,288 INFO L226 Difference]: Without dead ends: 1318 [2023-11-19 05:06:17,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4213 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1786, Invalid=9134, Unknown=0, NotChecked=0, Total=10920 [2023-11-19 05:06:17,299 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 666 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:17,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 588 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:06:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2023-11-19 05:06:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1193. [2023-11-19 05:06:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 854 states have (on average 1.288056206088993) internal successors, (1100), 944 states have internal predecessors, (1100), 161 states have call successors, (161), 136 states have call predecessors, (161), 177 states have return successors, (278), 176 states have call predecessors, (278), 161 states have call successors, (278) [2023-11-19 05:06:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1539 transitions. [2023-11-19 05:06:17,490 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1539 transitions. Word has length 47 [2023-11-19 05:06:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:17,493 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1539 transitions. [2023-11-19 05:06:17,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-19 05:06:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1539 transitions. [2023-11-19 05:06:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:06:17,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:17,499 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:06:17,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:17,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:17,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:17,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:17,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1089139744, now seen corresponding path program 1 times [2023-11-19 05:06:17,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:17,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587269702] [2023-11-19 05:06:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:17,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:17,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587269702] [2023-11-19 05:06:17,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587269702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:17,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:06:17,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36589607] [2023-11-19 05:06:17,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:17,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:17,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:17,788 INFO L87 Difference]: Start difference. First operand 1193 states and 1539 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 3 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) [2023-11-19 05:06:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:17,964 INFO L93 Difference]: Finished difference Result 1340 states and 1737 transitions. [2023-11-19 05:06:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:06:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 3 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 47 [2023-11-19 05:06:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:17,970 INFO L225 Difference]: With dead ends: 1340 [2023-11-19 05:06:17,970 INFO L226 Difference]: Without dead ends: 603 [2023-11-19 05:06:17,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:17,974 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 84 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:17,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 112 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-11-19 05:06:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 588. [2023-11-19 05:06:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 421 states have (on average 1.2612826603325415) internal successors, (531), 462 states have internal predecessors, (531), 81 states have call successors, (81), 69 states have call predecessors, (81), 85 states have return successors, (127), 86 states have call predecessors, (127), 81 states have call successors, (127) [2023-11-19 05:06:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 739 transitions. [2023-11-19 05:06:18,049 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 739 transitions. Word has length 47 [2023-11-19 05:06:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:18,050 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 739 transitions. [2023-11-19 05:06:18,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 3 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) [2023-11-19 05:06:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 739 transitions. [2023-11-19 05:06:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 05:06:18,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:18,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:18,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:06:18,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:18,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -180309667, now seen corresponding path program 1 times [2023-11-19 05:06:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:18,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019988324] [2023-11-19 05:06:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:18,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019988324] [2023-11-19 05:06:18,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019988324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687843799] [2023-11-19 05:06:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:18,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:18,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:18,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:18,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:06:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:18,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:06:18,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:06:18,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:06:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687843799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:06:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 19 [2023-11-19 05:06:18,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155918982] [2023-11-19 05:06:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:06:18,953 INFO L87 Difference]: Start difference. First operand 588 states and 739 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:06:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:19,111 INFO L93 Difference]: Finished difference Result 919 states and 1194 transitions. [2023-11-19 05:06:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:06:19,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2023-11-19 05:06:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:19,117 INFO L225 Difference]: With dead ends: 919 [2023-11-19 05:06:19,117 INFO L226 Difference]: Without dead ends: 517 [2023-11-19 05:06:19,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:06:19,122 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:19,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 122 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-11-19 05:06:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 481. [2023-11-19 05:06:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 342 states have (on average 1.195906432748538) internal successors, (409), 375 states have internal predecessors, (409), 70 states have call successors, (70), 60 states have call predecessors, (70), 68 states have return successors, (106), 68 states have call predecessors, (106), 70 states have call successors, (106) [2023-11-19 05:06:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 585 transitions. [2023-11-19 05:06:19,189 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 585 transitions. Word has length 64 [2023-11-19 05:06:19,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 585 transitions. [2023-11-19 05:06:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:06:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 585 transitions. [2023-11-19 05:06:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:06:19,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:19,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:19,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:19,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:19,412 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:19,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1873640392, now seen corresponding path program 2 times [2023-11-19 05:06:19,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:19,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237729560] [2023-11-19 05:06:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:06:20,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:20,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237729560] [2023-11-19 05:06:20,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237729560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:20,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13129364] [2023-11-19 05:06:20,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:06:20,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:20,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:20,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:20,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:06:20,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 05:06:20,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:20,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:06:20,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-19 05:06:20,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:06:20,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13129364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:20,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:06:20,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 20 [2023-11-19 05:06:20,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289978273] [2023-11-19 05:06:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:20,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:06:20,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:06:20,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:06:20,570 INFO L87 Difference]: Start difference. First operand 481 states and 585 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:06:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:20,736 INFO L93 Difference]: Finished difference Result 787 states and 986 transitions. [2023-11-19 05:06:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:06:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2023-11-19 05:06:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:20,743 INFO L225 Difference]: With dead ends: 787 [2023-11-19 05:06:20,744 INFO L226 Difference]: Without dead ends: 526 [2023-11-19 05:06:20,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:06:20,746 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 25 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:20,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 205 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-19 05:06:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 483. [2023-11-19 05:06:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 344 states have (on average 1.188953488372093) internal successors, (409), 376 states have internal predecessors, (409), 70 states have call successors, (70), 60 states have call predecessors, (70), 68 states have return successors, (106), 69 states have call predecessors, (106), 70 states have call successors, (106) [2023-11-19 05:06:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 585 transitions. [2023-11-19 05:06:20,827 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 585 transitions. Word has length 69 [2023-11-19 05:06:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:20,827 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 585 transitions. [2023-11-19 05:06:20,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:06:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 585 transitions. [2023-11-19 05:06:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 05:06:20,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:20,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:20,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:21,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:06:21,044 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:21,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash 129034080, now seen corresponding path program 1 times [2023-11-19 05:06:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:21,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714218754] [2023-11-19 05:06:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:06:21,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714218754] [2023-11-19 05:06:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714218754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748638891] [2023-11-19 05:06:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:21,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:21,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:06:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:21,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 05:06:21,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:06:22,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:06:22,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748638891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343234853] [2023-11-19 05:06:22,548 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-11-19 05:06:22,548 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:22,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:22,549 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:22,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:06:30,723 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 148 for LOIs [2023-11-19 05:06:30,816 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2023-11-19 05:06:30,907 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 28 for LOIs [2023-11-19 05:06:31,008 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 20 for LOIs [2023-11-19 05:06:31,011 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:38,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14849#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~waterLevel~0 0))' at error location [2023-11-19 05:06:38,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:06:38,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:38,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2023-11-19 05:06:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693316528] [2023-11-19 05:06:38,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 05:06:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 05:06:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2023-11-19 05:06:38,111 INFO L87 Difference]: Start difference. First operand 483 states and 585 transitions. Second operand has 28 states, 25 states have (on average 4.04) internal successors, (101), 23 states have internal predecessors, (101), 14 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-19 05:06:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:40,905 INFO L93 Difference]: Finished difference Result 1596 states and 2027 transitions. [2023-11-19 05:06:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-19 05:06:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.04) internal successors, (101), 23 states have internal predecessors, (101), 14 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) Word has length 77 [2023-11-19 05:06:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:40,917 INFO L225 Difference]: With dead ends: 1596 [2023-11-19 05:06:40,918 INFO L226 Difference]: Without dead ends: 1225 [2023-11-19 05:06:40,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1259, Invalid=7671, Unknown=0, NotChecked=0, Total=8930 [2023-11-19 05:06:40,928 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 687 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:40,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 872 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 05:06:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2023-11-19 05:06:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1015. [2023-11-19 05:06:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 733 states have (on average 1.2073669849931787) internal successors, (885), 797 states have internal predecessors, (885), 145 states have call successors, (145), 120 states have call predecessors, (145), 136 states have return successors, (231), 146 states have call predecessors, (231), 145 states have call successors, (231) [2023-11-19 05:06:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1261 transitions. [2023-11-19 05:06:41,071 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1261 transitions. Word has length 77 [2023-11-19 05:06:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:41,072 INFO L495 AbstractCegarLoop]: Abstraction has 1015 states and 1261 transitions. [2023-11-19 05:06:41,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.04) internal successors, (101), 23 states have internal predecessors, (101), 14 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-19 05:06:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1261 transitions. [2023-11-19 05:06:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 05:06:41,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:41,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:06:41,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:41,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:06:41,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:41,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1876322365, now seen corresponding path program 1 times [2023-11-19 05:06:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:41,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866192573] [2023-11-19 05:06:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:41,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:06:42,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866192573] [2023-11-19 05:06:42,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866192573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374514126] [2023-11-19 05:06:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:42,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:42,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:42,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_820d8832-7fa7-4853-ad23-bb2f50cae695/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:06:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:42,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 05:06:42,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 51 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:43,409 INFO L327 TraceCheckSpWp]: Computing backward predicates...