./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec3_product57.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/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_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec3_product57.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/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_4e83151c-64cc-48ce-831c-4c06ba8e40c7/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 3cfb2febd3006e73b0e8309478193e665e2e7ddd381dfad7d5652117e74962c4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:36,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:36,907 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:48:36,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:36,915 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:36,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:36,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:36,948 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:36,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:36,949 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:36,950 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:36,951 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:36,952 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:36,952 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:36,953 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:36,954 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:36,954 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:36,955 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:36,956 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:36,956 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:36,957 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:36,958 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:36,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:36,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:36,960 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:36,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:36,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:36,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:36,962 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:36,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:36,963 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:36,963 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:36,964 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:36,964 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:36,965 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:36,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:36,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:36,966 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:36,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:36,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:36,968 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:36,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:36,969 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:36,969 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:36,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:36,969 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_4e83151c-64cc-48ce-831c-4c06ba8e40c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cfb2febd3006e73b0e8309478193e665e2e7ddd381dfad7d5652117e74962c4 [2023-11-19 04:48:37,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:37,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:37,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:37,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:37,412 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:37,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec3_product57.cil.c [2023-11-19 04:48:41,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:41,318 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:41,319 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/sv-benchmarks/c/product-lines/minepump_spec3_product57.cil.c [2023-11-19 04:48:41,335 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/data/7f52e4a32/d396e31bdc57469d96c1e52e2d206deb/FLAG270cf4b4d [2023-11-19 04:48:41,363 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/data/7f52e4a32/d396e31bdc57469d96c1e52e2d206deb [2023-11-19 04:48:41,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:41,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:41,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:41,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:41,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:41,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:41,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f942050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41, skipping insertion in model container [2023-11-19 04:48:41,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:41,467 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:41,782 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_4e83151c-64cc-48ce-831c-4c06ba8e40c7/sv-benchmarks/c/product-lines/minepump_spec3_product57.cil.c[13989,14002] [2023-11-19 04:48:41,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:41,836 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:41,850 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49] [2023-11-19 04:48:41,852 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [415] [2023-11-19 04:48:41,853 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [526] [2023-11-19 04:48:41,853 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [564] [2023-11-19 04:48:41,853 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [600] [2023-11-19 04:48:41,854 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [609] [2023-11-19 04:48:41,854 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [828] [2023-11-19 04:48:41,854 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [894] [2023-11-19 04:48:41,920 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_4e83151c-64cc-48ce-831c-4c06ba8e40c7/sv-benchmarks/c/product-lines/minepump_spec3_product57.cil.c[13989,14002] [2023-11-19 04:48:41,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:41,998 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:41,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41 WrapperNode [2023-11-19 04:48:41,999 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:42,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:42,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:42,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:42,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,101 INFO L138 Inliner]: procedures = 56, calls = 101, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 227 [2023-11-19 04:48:42,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:42,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:42,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:42,104 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:42,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,133 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,182 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,185 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,207 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:42,208 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:42,209 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:42,209 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:42,210 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:42,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:42,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:42,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:42,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:42,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 04:48:42,299 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 04:48:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:48:42,300 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:48:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:48:42,300 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:48:42,300 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-19 04:48:42,301 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-19 04:48:42,301 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:48:42,302 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:48:42,302 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 04:48:42,303 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 04:48:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 04:48:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 04:48:42,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:42,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:42,396 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:42,400 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:42,790 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:43,044 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:43,044 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:48:43,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:43 BoogieIcfgContainer [2023-11-19 04:48:43,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:43,056 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:43,056 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:43,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:43,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:41" (1/3) ... [2023-11-19 04:48:43,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b01cf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:43, skipping insertion in model container [2023-11-19 04:48:43,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41" (2/3) ... [2023-11-19 04:48:43,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b01cf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:43, skipping insertion in model container [2023-11-19 04:48:43,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:43" (3/3) ... [2023-11-19 04:48:43,064 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product57.cil.c [2023-11-19 04:48:43,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:43,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:48:43,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:43,153 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;@38a262ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:43,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:48:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:48:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:48:43,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:43,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:43,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash -863929710, now seen corresponding path program 1 times [2023-11-19 04:48:43,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481353098] [2023-11-19 04:48:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,410 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 04:48:43,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:43,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481353098] [2023-11-19 04:48:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481353098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:43,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070606311] [2023-11-19 04:48:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:43,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:48:43,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:48:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:48:43,465 INFO L87 Difference]: Start difference. First operand has 58 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 45 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:48:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:43,553 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-11-19 04:48:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:48:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 04:48:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:43,569 INFO L225 Difference]: With dead ends: 114 [2023-11-19 04:48:43,569 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 04:48:43,574 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 04:48:43,579 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:43,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 04:48:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-19 04:48:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 41 states have internal predecessors, (45), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 04:48:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2023-11-19 04:48:43,640 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 17 [2023-11-19 04:48:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:43,641 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2023-11-19 04:48:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:48:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2023-11-19 04:48:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:48:43,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:43,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:43,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:43,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1219374945, now seen corresponding path program 1 times [2023-11-19 04:48:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705371937] [2023-11-19 04:48:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:43,781 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 04:48:43,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705371937] [2023-11-19 04:48:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705371937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:43,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:43,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543847635] [2023-11-19 04:48:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:43,787 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:48:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:43,849 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2023-11-19 04:48:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:43,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-19 04:48:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:43,852 INFO L225 Difference]: With dead ends: 83 [2023-11-19 04:48:43,852 INFO L226 Difference]: Without dead ends: 45 [2023-11-19 04:48:43,854 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 04:48:43,856 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:43,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 75 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-19 04:48:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-19 04:48:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 04:48:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-19 04:48:43,870 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 18 [2023-11-19 04:48:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:43,871 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-19 04:48:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:48:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-19 04:48:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:48:43,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,874 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] [2023-11-19 04:48:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:48:43,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:43,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash 247805918, now seen corresponding path program 1 times [2023-11-19 04:48:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631952307] [2023-11-19 04:48:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:44,165 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 04:48:44,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631952307] [2023-11-19 04:48:44,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631952307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:44,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:44,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:48:44,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682643711] [2023-11-19 04:48:44,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:44,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:44,170 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:48:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:44,288 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2023-11-19 04:48:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 04:48:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:44,290 INFO L225 Difference]: With dead ends: 88 [2023-11-19 04:48:44,291 INFO L226 Difference]: Without dead ends: 45 [2023-11-19 04:48:44,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:44,294 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:44,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-19 04:48:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-19 04:48:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 04:48:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-19 04:48:44,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 20 [2023-11-19 04:48:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:44,308 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-19 04:48:44,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:48:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-11-19 04:48:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:48:44,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:44,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:44,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:48:44,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:44,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 309137917, now seen corresponding path program 1 times [2023-11-19 04:48:44,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767156185] [2023-11-19 04:48:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:44,575 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 04:48:44,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767156185] [2023-11-19 04:48:44,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767156185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:44,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:44,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:48:44,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017993008] [2023-11-19 04:48:44,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:48:44,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:48:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:44,580 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 04:48:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:44,998 INFO L93 Difference]: Finished difference Result 230 states and 298 transitions. [2023-11-19 04:48:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:48:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 23 [2023-11-19 04:48:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,011 INFO L225 Difference]: With dead ends: 230 [2023-11-19 04:48:45,012 INFO L226 Difference]: Without dead ends: 187 [2023-11-19 04:48:45,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:45,017 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 153 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 255 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:48:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-19 04:48:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 163. [2023-11-19 04:48:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 123 states have internal predecessors, (141), 28 states have call successors, (28), 23 states have call predecessors, (28), 25 states have return successors, (37), 27 states have call predecessors, (37), 28 states have call successors, (37) [2023-11-19 04:48:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 206 transitions. [2023-11-19 04:48:45,104 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 206 transitions. Word has length 23 [2023-11-19 04:48:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,105 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 206 transitions. [2023-11-19 04:48:45,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 04:48:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 206 transitions. [2023-11-19 04:48:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:48:45,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:45,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:48:45,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash -698209148, now seen corresponding path program 1 times [2023-11-19 04:48:45,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566642358] [2023-11-19 04:48:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,300 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 04:48:45,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566642358] [2023-11-19 04:48:45,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566642358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:48:45,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314634317] [2023-11-19 04:48:45,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:45,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:45,311 INFO L87 Difference]: Start difference. First operand 163 states and 206 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:48:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,533 INFO L93 Difference]: Finished difference Result 478 states and 627 transitions. [2023-11-19 04:48:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:45,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-19 04:48:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,545 INFO L225 Difference]: With dead ends: 478 [2023-11-19 04:48:45,546 INFO L226 Difference]: Without dead ends: 317 [2023-11-19 04:48:45,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:45,556 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 194 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-19 04:48:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 284. [2023-11-19 04:48:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 191 states have (on average 1.256544502617801) internal successors, (240), 209 states have internal predecessors, (240), 46 states have call successors, (46), 40 states have call predecessors, (46), 46 states have return successors, (77), 48 states have call predecessors, (77), 46 states have call successors, (77) [2023-11-19 04:48:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 363 transitions. [2023-11-19 04:48:45,639 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 363 transitions. Word has length 31 [2023-11-19 04:48:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,640 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 363 transitions. [2023-11-19 04:48:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:48:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 363 transitions. [2023-11-19 04:48:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:48:45,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:45,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:48:45,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 580178795, now seen corresponding path program 1 times [2023-11-19 04:48:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766170384] [2023-11-19 04:48:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,125 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 04:48:46,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766170384] [2023-11-19 04:48:46,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766170384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:46,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:46,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 04:48:46,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979058618] [2023-11-19 04:48:46,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:48:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:48:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:48:46,142 INFO L87 Difference]: Start difference. First operand 284 states and 363 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 04:48:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:46,949 INFO L93 Difference]: Finished difference Result 887 states and 1183 transitions. [2023-11-19 04:48:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 04:48:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-11-19 04:48:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:46,956 INFO L225 Difference]: With dead ends: 887 [2023-11-19 04:48:46,956 INFO L226 Difference]: Without dead ends: 654 [2023-11-19 04:48:46,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:48:46,960 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 205 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:46,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 327 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:48:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2023-11-19 04:48:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 630. [2023-11-19 04:48:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 433 states have (on average 1.2609699769053118) internal successors, (546), 466 states have internal predecessors, (546), 99 states have call successors, (99), 86 states have call predecessors, (99), 97 states have return successors, (168), 102 states have call predecessors, (168), 99 states have call successors, (168) [2023-11-19 04:48:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 813 transitions. [2023-11-19 04:48:47,072 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 813 transitions. Word has length 34 [2023-11-19 04:48:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:47,073 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 813 transitions. [2023-11-19 04:48:47,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 04:48:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 813 transitions. [2023-11-19 04:48:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:48:47,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:47,077 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:47,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:48:47,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:47,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1627058204, now seen corresponding path program 1 times [2023-11-19 04:48:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:47,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631627505] [2023-11-19 04:48:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:48:47,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:47,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631627505] [2023-11-19 04:48:47,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631627505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:47,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414132467] [2023-11-19 04:48:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:47,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:47,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:47,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 04:48:47,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:47,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:48:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414132467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824908460] [2023-11-19 04:48:47,984 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-19 04:48:47,984 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:47,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:47,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:47,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:49,165 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-11-19 04:48:49,224 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 135 for LOIs [2023-11-19 04:48:53,937 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 132 for LOIs [2023-11-19 04:48:54,686 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 169 for LOIs [2023-11-19 04:48:55,121 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:11,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4480#(and (<= 1 |#StackHeapBarrier|) (= ~pumpRunning~0 0) (= 2 ~waterLevel~0) (= ~methaneLevelCritical~0 0) (= |timeShift_isPumpRunning_#res#1| 0) (= 2 |timeShift_getWaterLevel_#res#1|) (= ~head~0.offset 0) (= 0 |timeShift___utac_acc__Specification3_spec__1_~tmp___1~0#1|) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (or (and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= 30 (select |#length| 7)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#valid| 9) 1) (= (select |#length| 12) 25) (= (select |#valid| 11) 1) (= 30 (select |#length| 4)) (= 31 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= 30 (select |#length| 13)) (= 30 (select |#length| 10)) (= (select |#valid| 12) 1) (exists ((|v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| 2147483647) (not (= |v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| 0)) (<= 0 (+ |v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| 2147483648)))) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#length| 6) 21) (= (select |#valid| 14) 1) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_test_~tmp___1~1#1_BEFORE_CALL_1| Int)) (and (or (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 0)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~1#1_BEFORE_CALL_1| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___1~1#1_BEFORE_CALL_1| 2147483647))) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1|)))) (= (select |#valid| 2) 1) (= 9 (select |#length| 11)) (exists ((|v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_2| Int)) (and (<= |v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_2| 2147483647) (<= 0 (+ |v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_2| 2147483648)) (not (= |v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_2| 0)))) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 1) 1) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= |old(~waterLevel~0)| 2) (= (select |#valid| 13) 1)) (and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= 30 (select |#length| 7)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#valid| 9) 1) (exists ((|v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_1| Int)) (and (not (= |v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_1| 0)) (<= |v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_1| 2147483647) (<= 0 (+ |v_processEnvironment__wrappee__highWaterSensor_isMethaneAlarm_#res#1_BEFORE_RETURN_1| 2147483648)))) (= (select |#length| 12) 25) (= (select |#valid| 11) 1) (= 30 (select |#length| 4)) (= 31 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= 30 (select |#length| 13)) (= 30 (select |#length| 10)) (= (select |#valid| 12) 1) (exists ((|v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| 2147483647) (not (= |v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| 0)) (<= 0 (+ |v_ULTIMATE.start_test_~tmp~9#1_BEFORE_CALL_3| 2147483648)))) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#length| 6) 21) (= (select |#valid| 14) 1) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_test_~tmp___1~1#1_BEFORE_CALL_1| Int)) (and (or (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 0)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~1#1_BEFORE_CALL_1| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___1~1#1_BEFORE_CALL_1| 2147483647))) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1|)))) (= (select |#valid| 2) 1) (= 9 (select |#length| 11)) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 1) 1) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= |old(~waterLevel~0)| 2) (= (select |#valid| 13) 1))) (= ~head~0.base 0) (= |timeShift___utac_acc__Specification3_spec__1_~tmp~3#1| 0) (= ~cleanupTimeShifts~0 4) (= 2 |timeShift___utac_acc__Specification3_spec__1_~tmp___0~0#1|))' at error location [2023-11-19 04:49:11,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:49:11,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:49:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2023-11-19 04:49:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996647089] [2023-11-19 04:49:11,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:49:11,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 04:49:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 04:49:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2023-11-19 04:49:11,810 INFO L87 Difference]: Start difference. First operand 630 states and 813 transitions. Second operand has 18 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 3 states have call predecessors, (10), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:49:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:13,488 INFO L93 Difference]: Finished difference Result 2583 states and 3433 transitions. [2023-11-19 04:49:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 04:49:13,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 3 states have call predecessors, (10), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 35 [2023-11-19 04:49:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:13,505 INFO L225 Difference]: With dead ends: 2583 [2023-11-19 04:49:13,506 INFO L226 Difference]: Without dead ends: 2020 [2023-11-19 04:49:13,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=402, Invalid=3758, Unknown=0, NotChecked=0, Total=4160 [2023-11-19 04:49:13,514 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 396 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:13,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 795 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:49:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2023-11-19 04:49:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1804. [2023-11-19 04:49:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1257 states have (on average 1.2346857597454257) internal successors, (1552), 1327 states have internal predecessors, (1552), 279 states have call successors, (279), 234 states have call predecessors, (279), 267 states have return successors, (427), 284 states have call predecessors, (427), 279 states have call successors, (427) [2023-11-19 04:49:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2258 transitions. [2023-11-19 04:49:13,763 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2258 transitions. Word has length 35 [2023-11-19 04:49:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:13,763 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2258 transitions. [2023-11-19 04:49:13,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 5 states have call successors, (10), 3 states have call predecessors, (10), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:49:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2258 transitions. [2023-11-19 04:49:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 04:49:13,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:13,767 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:13,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 04:49:13,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:13,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1045512499, now seen corresponding path program 1 times [2023-11-19 04:49:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:13,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232629530] [2023-11-19 04:49:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:49:14,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232629530] [2023-11-19 04:49:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232629530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 04:49:14,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078468341] [2023-11-19 04:49:14,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:14,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:49:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:14,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:49:14,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:49:14,258 INFO L87 Difference]: Start difference. First operand 1804 states and 2258 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 04:49:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:15,153 INFO L93 Difference]: Finished difference Result 4115 states and 5266 transitions. [2023-11-19 04:49:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:49:15,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2023-11-19 04:49:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:15,180 INFO L225 Difference]: With dead ends: 4115 [2023-11-19 04:49:15,180 INFO L226 Difference]: Without dead ends: 2934 [2023-11-19 04:49:15,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:49:15,194 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:15,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 102 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:49:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2023-11-19 04:49:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2861. [2023-11-19 04:49:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 1974 states have (on average 1.2056737588652482) internal successors, (2380), 2085 states have internal predecessors, (2380), 452 states have call successors, (452), 379 states have call predecessors, (452), 434 states have return successors, (699), 463 states have call predecessors, (699), 452 states have call successors, (699) [2023-11-19 04:49:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 3531 transitions. [2023-11-19 04:49:15,627 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 3531 transitions. Word has length 38 [2023-11-19 04:49:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:15,628 INFO L495 AbstractCegarLoop]: Abstraction has 2861 states and 3531 transitions. [2023-11-19 04:49:15,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 04:49:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 3531 transitions. [2023-11-19 04:49:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:49:15,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:15,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:49:15,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:15,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:15,640 INFO L85 PathProgramCache]: Analyzing trace with hash -608998188, now seen corresponding path program 1 times [2023-11-19 04:49:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:15,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672164527] [2023-11-19 04:49:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:15,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:49:15,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672164527] [2023-11-19 04:49:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672164527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307000158] [2023-11-19 04:49:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:15,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:15,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:49:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:15,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 04:49:15,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:49:16,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:49:16,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307000158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:16,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43108600] [2023-11-19 04:49:16,915 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-19 04:49:16,916 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:16,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:16,916 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:16,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:18,354 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-11-19 04:49:18,386 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 135 for LOIs [2023-11-19 04:49:18,492 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [43108600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:22,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:49:22,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 10, 11] total 34 [2023-11-19 04:49:22,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064120674] [2023-11-19 04:49:22,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:22,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:49:22,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:49:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 04:49:22,799 INFO L87 Difference]: Start difference. First operand 2861 states and 3531 transitions. Second operand has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:49:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:24,756 INFO L93 Difference]: Finished difference Result 4816 states and 5961 transitions. [2023-11-19 04:49:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:49:24,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2023-11-19 04:49:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:24,785 INFO L225 Difference]: With dead ends: 4816 [2023-11-19 04:49:24,785 INFO L226 Difference]: Without dead ends: 2828 [2023-11-19 04:49:24,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 04:49:24,797 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:24,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 233 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:49:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2023-11-19 04:49:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2821. [2023-11-19 04:49:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 1946 states have (on average 1.2050359712230216) internal successors, (2345), 2053 states have internal predecessors, (2345), 445 states have call successors, (445), 377 states have call predecessors, (445), 429 states have return successors, (688), 454 states have call predecessors, (688), 445 states have call successors, (688) [2023-11-19 04:49:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 3478 transitions. [2023-11-19 04:49:25,197 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 3478 transitions. Word has length 49 [2023-11-19 04:49:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:25,197 INFO L495 AbstractCegarLoop]: Abstraction has 2821 states and 3478 transitions. [2023-11-19 04:49:25,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:49:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 3478 transitions. [2023-11-19 04:49:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:49:25,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:25,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:25,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:25,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:49:25,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:25,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash 411651218, now seen corresponding path program 1 times [2023-11-19 04:49:25,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:25,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802447664] [2023-11-19 04:49:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:49:25,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802447664] [2023-11-19 04:49:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802447664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:25,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:25,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845577001] [2023-11-19 04:49:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:25,496 INFO L87 Difference]: Start difference. First operand 2821 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 04:49:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:25,790 INFO L93 Difference]: Finished difference Result 4359 states and 5455 transitions. [2023-11-19 04:49:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2023-11-19 04:49:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:25,808 INFO L225 Difference]: With dead ends: 4359 [2023-11-19 04:49:25,808 INFO L226 Difference]: Without dead ends: 2175 [2023-11-19 04:49:25,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:49:25,818 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:25,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:49:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2023-11-19 04:49:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2102. [2023-11-19 04:49:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 1455 states have (on average 1.1869415807560137) internal successors, (1727), 1526 states have internal predecessors, (1727), 333 states have call successors, (333), 289 states have call predecessors, (333), 313 states have return successors, (467), 333 states have call predecessors, (467), 333 states have call successors, (467) [2023-11-19 04:49:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 2527 transitions. [2023-11-19 04:49:26,179 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 2527 transitions. Word has length 55 [2023-11-19 04:49:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:26,179 INFO L495 AbstractCegarLoop]: Abstraction has 2102 states and 2527 transitions. [2023-11-19 04:49:26,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 04:49:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 2527 transitions. [2023-11-19 04:49:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:49:26,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:26,183 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:49:26,184 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:26,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -918491323, now seen corresponding path program 1 times [2023-11-19 04:49:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866110721] [2023-11-19 04:49:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:26,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:49:26,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:26,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866110721] [2023-11-19 04:49:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866110721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:26,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513021447] [2023-11-19 04:49:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:26,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:26,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:26,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:26,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e83151c-64cc-48ce-831c-4c06ba8e40c7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:49:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:26,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 04:49:26,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:49:26,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:49:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513021447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066815484] [2023-11-19 04:49:27,051 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-11-19 04:49:27,052 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:27,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:27,053 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:27,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs