./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product39.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product39.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5 --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 df3faf2d1bbcaed92e1c2eddcb5ae1d2459730e99808e363d537a0bc5d54e347 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:59:24,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:59:25,032 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 18:59:25,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:59:25,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:59:25,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:59:25,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:59:25,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:59:25,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:59:25,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:59:25,087 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:59:25,087 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:59:25,088 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:59:25,088 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:59:25,089 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:59:25,090 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:59:25,090 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:59:25,091 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:59:25,092 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:59:25,093 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:59:25,093 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:59:25,094 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:59:25,095 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:59:25,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 18:59:25,096 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:59:25,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:59:25,098 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:59:25,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:59:25,099 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 18:59:25,099 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:59:25,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 18:59:25,100 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:59:25,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 18:59:25,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:59:25,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:59:25,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:59:25,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:59:25,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:25,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:59:25,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:59:25,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 18:59:25,106 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:59:25,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:59:25,107 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:59:25,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 18:59:25,107 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:59:25,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:59:25,108 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_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3faf2d1bbcaed92e1c2eddcb5ae1d2459730e99808e363d537a0bc5d54e347 [2023-11-21 18:59:25,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:59:25,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:59:25,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:59:25,419 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:59:25,420 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:59:25,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/product-lines/minepump_spec5_product39.cil.c [2023-11-21 18:59:28,682 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:59:28,936 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:59:28,937 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/sv-benchmarks/c/product-lines/minepump_spec5_product39.cil.c [2023-11-21 18:59:28,959 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/data/3901275f6/e09905c7a6934a7c87ade1988a3ef480/FLAG1a7894568 [2023-11-21 18:59:28,977 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/data/3901275f6/e09905c7a6934a7c87ade1988a3ef480 [2023-11-21 18:59:28,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:59:28,981 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:59:28,983 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:28,983 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:59:28,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:59:28,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:28" (1/1) ... [2023-11-21 18:59:28,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c877ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:28, skipping insertion in model container [2023-11-21 18:59:28,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:28" (1/1) ... [2023-11-21 18:59:29,042 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:59:29,207 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_784218b8-e986-4108-9512-5d09929189f6/sv-benchmarks/c/product-lines/minepump_spec5_product39.cil.c[1605,1618] [2023-11-21 18:59:29,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:29,354 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:59:29,367 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [49] [2023-11-21 18:59:29,369 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [58] [2023-11-21 18:59:29,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [96] [2023-11-21 18:59:29,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [304] [2023-11-21 18:59:29,370 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [405] [2023-11-21 18:59:29,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [472] [2023-11-21 18:59:29,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [522] [2023-11-21 18:59:29,371 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [888] [2023-11-21 18:59:29,384 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_784218b8-e986-4108-9512-5d09929189f6/sv-benchmarks/c/product-lines/minepump_spec5_product39.cil.c[1605,1618] [2023-11-21 18:59:29,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:29,525 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:59:29,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29 WrapperNode [2023-11-21 18:59:29,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:29,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:29,528 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:59:29,528 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:59:29,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,552 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,592 INFO L138 Inliner]: procedures = 56, calls = 102, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 206 [2023-11-21 18:59:29,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:29,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:59:29,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:59:29,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:59:29,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,608 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,622 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,627 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:59:29,628 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:59:29,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:59:29,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:59:29,630 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (1/1) ... [2023-11-21 18:59:29,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:29,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:29,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:59:29,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:59:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:59:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-21 18:59:29,717 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-21 18:59:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-21 18:59:29,718 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-21 18:59:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-21 18:59:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-21 18:59:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-21 18:59:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-21 18:59:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-21 18:59:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-21 18:59:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-21 18:59:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-21 18:59:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-21 18:59:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-21 18:59:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 18:59:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-21 18:59:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-21 18:59:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:59:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:59:29,802 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:59:29,805 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:59:30,130 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:59:30,278 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:59:30,278 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 18:59:30,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:30 BoogieIcfgContainer [2023-11-21 18:59:30,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:59:30,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:59:30,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:59:30,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:59:30,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:59:28" (1/3) ... [2023-11-21 18:59:30,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59617f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:30, skipping insertion in model container [2023-11-21 18:59:30,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:29" (2/3) ... [2023-11-21 18:59:30,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59617f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:30, skipping insertion in model container [2023-11-21 18:59:30,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:30" (3/3) ... [2023-11-21 18:59:30,290 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product39.cil.c [2023-11-21 18:59:30,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:59:30,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 18:59:30,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:59:30,374 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;@2e82afc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:59:30,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 18:59:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 51 states have internal predecessors, (61), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-21 18:59:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 18:59:30,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:30,395 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] [2023-11-21 18:59:30,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:30,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash -172014330, now seen corresponding path program 1 times [2023-11-21 18:59:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:30,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540123290] [2023-11-21 18:59:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:30,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:30,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540123290] [2023-11-21 18:59:30,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540123290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:30,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:30,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648928000] [2023-11-21 18:59:30,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 18:59:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 18:59:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 18:59:30,895 INFO L87 Difference]: Start difference. First operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 51 states have internal predecessors, (61), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 18:59:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:31,049 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2023-11-21 18:59:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 18:59:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-21 18:59:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:31,067 INFO L225 Difference]: With dead ends: 130 [2023-11-21 18:59:31,067 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 18:59:31,076 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 [2023-11-21 18:59:31,084 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:31,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 18:59:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-21 18:59:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-21 18:59:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-21 18:59:31,132 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 21 [2023-11-21 18:59:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:31,133 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-21 18:59:31,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 18:59:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-21 18:59:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 18:59:31,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:31,136 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] [2023-11-21 18:59:31,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 18:59:31,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:31,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1100931745, now seen corresponding path program 1 times [2023-11-21 18:59:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931803947] [2023-11-21 18:59:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:31,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:31,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931803947] [2023-11-21 18:59:31,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931803947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:31,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:31,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:31,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635490292] [2023-11-21 18:59:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:31,252 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 18:59:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:31,302 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2023-11-21 18:59:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-21 18:59:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:31,304 INFO L225 Difference]: With dead ends: 94 [2023-11-21 18:59:31,306 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 18:59:31,307 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 [2023-11-21 18:59:31,311 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:31,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 93 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:59:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 18:59:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-21 18:59:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 18:59:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-11-21 18:59:31,336 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 22 [2023-11-21 18:59:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:31,336 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-11-21 18:59:31,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 18:59:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-11-21 18:59:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 18:59:31,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:31,342 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] [2023-11-21 18:59:31,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 18:59:31,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:31,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1036542932, now seen corresponding path program 1 times [2023-11-21 18:59:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:31,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730037210] [2023-11-21 18:59:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:31,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:31,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:31,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730037210] [2023-11-21 18:59:31,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730037210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:31,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:31,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 18:59:31,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775509691] [2023-11-21 18:59:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:31,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:31,542 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 18:59:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:31,624 INFO L93 Difference]: Finished difference Result 155 states and 204 transitions. [2023-11-21 18:59:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:31,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-21 18:59:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:31,627 INFO L225 Difference]: With dead ends: 155 [2023-11-21 18:59:31,627 INFO L226 Difference]: Without dead ends: 104 [2023-11-21 18:59:31,628 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 [2023-11-21 18:59:31,629 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 54 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:31,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-21 18:59:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2023-11-21 18:59:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.390625) internal successors, (89), 79 states have internal predecessors, (89), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 15 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-21 18:59:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2023-11-21 18:59:31,653 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 25 [2023-11-21 18:59:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:31,653 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2023-11-21 18:59:31,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 18:59:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2023-11-21 18:59:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 18:59:31,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:31,656 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] [2023-11-21 18:59:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 18:59:31,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:31,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1599680337, now seen corresponding path program 1 times [2023-11-21 18:59:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:31,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157305553] [2023-11-21 18:59:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:31,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157305553] [2023-11-21 18:59:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157305553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:31,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:31,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 18:59:31,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016146403] [2023-11-21 18:59:31,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:31,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 18:59:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 18:59:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 18:59:31,923 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 18:59:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:32,169 INFO L93 Difference]: Finished difference Result 278 states and 373 transitions. [2023-11-21 18:59:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:59:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-21 18:59:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:32,174 INFO L225 Difference]: With dead ends: 278 [2023-11-21 18:59:32,174 INFO L226 Difference]: Without dead ends: 179 [2023-11-21 18:59:32,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-21 18:59:32,178 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 34 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:32,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 249 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-21 18:59:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2023-11-21 18:59:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 115 states have (on average 1.3130434782608695) internal successors, (151), 130 states have internal predecessors, (151), 32 states have call successors, (32), 26 states have call predecessors, (32), 26 states have return successors, (40), 29 states have call predecessors, (40), 32 states have call successors, (40) [2023-11-21 18:59:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 223 transitions. [2023-11-21 18:59:32,213 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 223 transitions. Word has length 28 [2023-11-21 18:59:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:32,214 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 223 transitions. [2023-11-21 18:59:32,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 18:59:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 223 transitions. [2023-11-21 18:59:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-21 18:59:32,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:32,217 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] [2023-11-21 18:59:32,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 18:59:32,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:32,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1612903047, now seen corresponding path program 1 times [2023-11-21 18:59:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:32,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429679950] [2023-11-21 18:59:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:32,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:32,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429679950] [2023-11-21 18:59:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429679950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:32,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:32,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 18:59:32,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961809016] [2023-11-21 18:59:32,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:32,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 18:59:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 18:59:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 18:59:32,618 INFO L87 Difference]: Start difference. First operand 174 states and 223 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 18:59:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:32,964 INFO L93 Difference]: Finished difference Result 505 states and 649 transitions. [2023-11-21 18:59:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:59:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2023-11-21 18:59:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:32,977 INFO L225 Difference]: With dead ends: 505 [2023-11-21 18:59:32,977 INFO L226 Difference]: Without dead ends: 333 [2023-11-21 18:59:32,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 18:59:32,985 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 152 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:32,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 340 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-21 18:59:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 318. [2023-11-21 18:59:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 212 states have (on average 1.2924528301886793) internal successors, (274), 235 states have internal predecessors, (274), 57 states have call successors, (57), 47 states have call predecessors, (57), 48 states have return successors, (74), 52 states have call predecessors, (74), 57 states have call successors, (74) [2023-11-21 18:59:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 405 transitions. [2023-11-21 18:59:33,076 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 405 transitions. Word has length 33 [2023-11-21 18:59:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:33,077 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 405 transitions. [2023-11-21 18:59:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 18:59:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 405 transitions. [2023-11-21 18:59:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 18:59:33,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:33,085 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] [2023-11-21 18:59:33,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 18:59:33,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:33,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:33,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1765654430, now seen corresponding path program 1 times [2023-11-21 18:59:33,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:33,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708622379] [2023-11-21 18:59:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:33,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 18:59:33,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:33,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708622379] [2023-11-21 18:59:33,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708622379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:33,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:33,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 18:59:33,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263100451] [2023-11-21 18:59:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:33,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 18:59:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 18:59:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:59:33,396 INFO L87 Difference]: Start difference. First operand 318 states and 405 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 18:59:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:33,956 INFO L93 Difference]: Finished difference Result 784 states and 1013 transitions. [2023-11-21 18:59:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 18:59:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2023-11-21 18:59:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:33,964 INFO L225 Difference]: With dead ends: 784 [2023-11-21 18:59:33,964 INFO L226 Difference]: Without dead ends: 542 [2023-11-21 18:59:33,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-21 18:59:33,968 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 204 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:33,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 264 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-21 18:59:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 514. [2023-11-21 18:59:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 346 states have (on average 1.2919075144508672) internal successors, (447), 384 states have internal predecessors, (447), 90 states have call successors, (90), 68 states have call predecessors, (90), 77 states have return successors, (121), 87 states have call predecessors, (121), 90 states have call successors, (121) [2023-11-21 18:59:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 658 transitions. [2023-11-21 18:59:34,054 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 658 transitions. Word has length 36 [2023-11-21 18:59:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 658 transitions. [2023-11-21 18:59:34,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 18:59:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 658 transitions. [2023-11-21 18:59:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 18:59:34,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:34,060 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:34,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 18:59:34,061 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:34,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash -860234831, now seen corresponding path program 1 times [2023-11-21 18:59:34,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:34,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478457056] [2023-11-21 18:59:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 18:59:34,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:34,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478457056] [2023-11-21 18:59:34,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478457056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:34,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:34,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 18:59:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005354108] [2023-11-21 18:59:34,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:34,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:34,118 INFO L87 Difference]: Start difference. First operand 514 states and 658 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 18:59:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:34,284 INFO L93 Difference]: Finished difference Result 620 states and 792 transitions. [2023-11-21 18:59:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2023-11-21 18:59:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:34,287 INFO L225 Difference]: With dead ends: 620 [2023-11-21 18:59:34,287 INFO L226 Difference]: Without dead ends: 247 [2023-11-21 18:59:34,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:34,289 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 94 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:34,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 128 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 18:59:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-21 18:59:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2023-11-21 18:59:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 167 states have (on average 1.2395209580838322) internal successors, (207), 184 states have internal predecessors, (207), 42 states have call successors, (42), 32 states have call predecessors, (42), 37 states have return successors, (57), 42 states have call predecessors, (57), 42 states have call successors, (57) [2023-11-21 18:59:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2023-11-21 18:59:34,321 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 57 [2023-11-21 18:59:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:34,322 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2023-11-21 18:59:34,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 18:59:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2023-11-21 18:59:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-21 18:59:34,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:34,323 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:34,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 18:59:34,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:34,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1315532243, now seen corresponding path program 1 times [2023-11-21 18:59:34,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:34,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083720388] [2023-11-21 18:59:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:34,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 18:59:34,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083720388] [2023-11-21 18:59:34,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083720388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741921439] [2023-11-21 18:59:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:34,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:34,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:34,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 18:59:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:34,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:34,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:34,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:34,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741921439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:34,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 18:59:34,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-21 18:59:34,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906241090] [2023-11-21 18:59:34,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:34,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:34,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:34,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:59:34,675 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 18:59:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:34,737 INFO L93 Difference]: Finished difference Result 369 states and 461 transitions. [2023-11-21 18:59:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 62 [2023-11-21 18:59:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:34,740 INFO L225 Difference]: With dead ends: 369 [2023-11-21 18:59:34,740 INFO L226 Difference]: Without dead ends: 237 [2023-11-21 18:59:34,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-21 18:59:34,742 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:34,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 113 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 18:59:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-21 18:59:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-11-21 18:59:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 40 states have call successors, (40), 32 states have call predecessors, (40), 36 states have return successors, (47), 40 states have call predecessors, (47), 40 states have call successors, (47) [2023-11-21 18:59:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 281 transitions. [2023-11-21 18:59:34,771 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 281 transitions. Word has length 62 [2023-11-21 18:59:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:34,771 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 281 transitions. [2023-11-21 18:59:34,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 18:59:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 281 transitions. [2023-11-21 18:59:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 18:59:34,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:34,773 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:34,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:34,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:34,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1343693288, now seen corresponding path program 1 times [2023-11-21 18:59:34,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:34,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783293591] [2023-11-21 18:59:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:34,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 18:59:35,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783293591] [2023-11-21 18:59:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783293591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388042243] [2023-11-21 18:59:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:35,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:35,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:35,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 18:59:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:35,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 18:59:35,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:35,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 18:59:35,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388042243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:35,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892623538] [2023-11-21 18:59:35,645 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-11-21 18:59:35,645 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:35,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:35,655 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:35,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:39,126 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 15 for LOIs [2023-11-21 18:59:39,134 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2023-11-21 18:59:39,589 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 49 for LOIs [2023-11-21 18:59:39,613 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 41 for LOIs [2023-11-21 18:59:39,705 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 28 for LOIs [2023-11-21 18:59:39,709 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:43,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6957#(and (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 0)) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2147483647) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= |old(~pumpRunning~0)| 2147483647) (<= 0 (+ 2147483648 |timeShift_getWaterLevel_#res#1|)) (or (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (= |timeShift_isMethaneAlarm_#res#1| 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isMethaneLevelCritical_#res#1| 0)) (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (= |old(~pumpRunning~0)| 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (= |old(~waterLevel~0)| ~waterLevel~0) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_11| Int)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_11| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_11| 2147483647) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_11| 0)))) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| |timeShift_getWaterLevel_#res#1|) (not (= 0 ~systemActive~0)))) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 2147483647) (= ~switchedOnBeforeTS~0 0))' at error location [2023-11-21 18:59:43,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:43,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:43,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-11-21 18:59:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852111122] [2023-11-21 18:59:43,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 18:59:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 18:59:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2023-11-21 18:59:43,132 INFO L87 Difference]: Start difference. First operand 237 states and 281 transitions. Second operand has 15 states, 12 states have (on average 7.333333333333333) internal successors, (88), 13 states have internal predecessors, (88), 7 states have call successors, (20), 4 states have call predecessors, (20), 8 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-21 18:59:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:43,959 INFO L93 Difference]: Finished difference Result 308 states and 374 transitions. [2023-11-21 18:59:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 18:59:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 7.333333333333333) internal successors, (88), 13 states have internal predecessors, (88), 7 states have call successors, (20), 4 states have call predecessors, (20), 8 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 65 [2023-11-21 18:59:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:43,965 INFO L225 Difference]: With dead ends: 308 [2023-11-21 18:59:43,965 INFO L226 Difference]: Without dead ends: 306 [2023-11-21 18:59:43,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 154 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=377, Invalid=3655, Unknown=0, NotChecked=0, Total=4032 [2023-11-21 18:59:43,970 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 195 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:43,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 658 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 18:59:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-21 18:59:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 285. [2023-11-21 18:59:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 191 states have (on average 1.2041884816753927) internal successors, (230), 212 states have internal predecessors, (230), 49 states have call successors, (49), 40 states have call predecessors, (49), 44 states have return successors, (60), 48 states have call predecessors, (60), 49 states have call successors, (60) [2023-11-21 18:59:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 339 transitions. [2023-11-21 18:59:44,006 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 339 transitions. Word has length 65 [2023-11-21 18:59:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:44,007 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 339 transitions. [2023-11-21 18:59:44,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 7.333333333333333) internal successors, (88), 13 states have internal predecessors, (88), 7 states have call successors, (20), 4 states have call predecessors, (20), 8 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-21 18:59:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 339 transitions. [2023-11-21 18:59:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-21 18:59:44,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:44,010 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:44,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:44,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 18:59:44,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1653695569, now seen corresponding path program 1 times [2023-11-21 18:59:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 18:59:44,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157409611] [2023-11-21 18:59:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:44,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 18:59:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 18:59:44,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 18:59:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157409611] [2023-11-21 18:59:44,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157409611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 18:59:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069666438] [2023-11-21 18:59:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:44,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:44,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:44,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 18:59:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:45,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 18:59:45,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 61 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 18:59:45,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-21 18:59:45,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069666438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:45,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539993578] [2023-11-21 18:59:45,702 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-21 18:59:45,703 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 18:59:45,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 18:59:45,703 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 18:59:45,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 18:59:52,333 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 18 for LOIs [2023-11-21 18:59:52,348 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 22 for LOIs [2023-11-21 18:59:52,603 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 39 for LOIs [2023-11-21 18:59:52,612 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 21 for LOIs [2023-11-21 18:59:52,636 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 30 for LOIs [2023-11-21 18:59:52,639 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 18:59:57,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8356#(and (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2147483648)) (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2147483647) (= |old(~pumpRunning~0)| 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2)) (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 1) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| |timeShift_getWaterLevel_#res#1|) (= ~switchedOnBeforeTS~0 0) (= ~pumpRunning~0 1))' at error location [2023-11-21 18:59:57,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 18:59:57,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 18:59:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2023-11-21 18:59:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14379953] [2023-11-21 18:59:57,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:57,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-21 18:59:57,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 18:59:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-21 18:59:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2023-11-21 18:59:57,525 INFO L87 Difference]: Start difference. First operand 285 states and 339 transitions. Second operand has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 14 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2023-11-21 19:00:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:00,734 INFO L93 Difference]: Finished difference Result 884 states and 1187 transitions. [2023-11-21 19:00:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-21 19:00:00,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 14 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) Word has length 86 [2023-11-21 19:00:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:00,743 INFO L225 Difference]: With dead ends: 884 [2023-11-21 19:00:00,744 INFO L226 Difference]: Without dead ends: 593 [2023-11-21 19:00:00,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1500, Invalid=11610, Unknown=0, NotChecked=0, Total=13110 [2023-11-21 19:00:00,752 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 977 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:00,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 1009 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 19:00:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-11-21 19:00:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 322. [2023-11-21 19:00:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 216 states have (on average 1.1759259259259258) internal successors, (254), 239 states have internal predecessors, (254), 53 states have call successors, (53), 46 states have call predecessors, (53), 52 states have return successors, (67), 53 states have call predecessors, (67), 53 states have call successors, (67) [2023-11-21 19:00:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 374 transitions. [2023-11-21 19:00:00,810 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 374 transitions. Word has length 86 [2023-11-21 19:00:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:00,811 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 374 transitions. [2023-11-21 19:00:00,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 14 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2023-11-21 19:00:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 374 transitions. [2023-11-21 19:00:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-21 19:00:00,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:00,813 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:00,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:01,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:01,030 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:01,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash -597204626, now seen corresponding path program 1 times [2023-11-21 19:00:01,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:01,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797119186] [2023-11-21 19:00:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:00:01,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797119186] [2023-11-21 19:00:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797119186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:00:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149026380] [2023-11-21 19:00:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:01,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:01,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784218b8-e986-4108-9512-5d09929189f6/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:00:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:01,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 19:00:02,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:00:02,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:00:03,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149026380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744284512] [2023-11-21 19:00:03,066 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-21 19:00:03,066 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:00:03,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:00:03,067 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:00:03,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:00:10,154 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 135 for LOIs [2023-11-21 19:00:10,222 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2023-11-21 19:00:10,555 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 49 for LOIs [2023-11-21 19:00:10,577 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 21 for LOIs [2023-11-21 19:00:10,605 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 31 for LOIs [2023-11-21 19:00:10,609 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:00:13,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10717#(and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 0)) (<= ~pumpRunning~0 1) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= |old(~pumpRunning~0)| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| 2)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (<= 0 (+ 2147483648 |timeShift_getWaterLevel_#res#1|)) (<= ~waterLevel~0 2147483647) (<= 0 ~pumpRunning~0) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~5#1| |timeShift_getWaterLevel_#res#1|) (= ~switchedOnBeforeTS~0 0))' at error location [2023-11-21 19:00:13,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:00:13,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:00:13,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 11] total 34 [2023-11-21 19:00:13,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918762051] [2023-11-21 19:00:13,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:00:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-21 19:00:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-21 19:00:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3766, Unknown=0, NotChecked=0, Total=4160 [2023-11-21 19:00:13,910 INFO L87 Difference]: Start difference. First operand 322 states and 374 transitions. Second operand has 34 states, 33 states have (on average 5.121212121212121) internal successors, (169), 34 states have internal predecessors, (169), 19 states have call successors, (34), 9 states have call predecessors, (34), 13 states have return successors, (31), 18 states have call predecessors, (31), 18 states have call successors, (31)