./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product48.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product48.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh --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 797436b26f0180d1dd4048b2036765c1f76ffc9f34d72e35837e9efcc5780486 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:37:32,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:37:32,829 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:37:32,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:37:32,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:37:32,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:37:32,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:37:32,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:37:32,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:37:32,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:37:32,865 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:37:32,865 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:37:32,866 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:37:32,866 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:37:32,867 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:37:32,867 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:37:32,868 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:37:32,868 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:37:32,869 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:37:32,869 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:37:32,870 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:37:32,870 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:37:32,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:37:32,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:37:32,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:37:32,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:37:32,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:37:32,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:37:32,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:37:32,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:37:32,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:37:32,875 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:37:32,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:37:32,876 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:37:32,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:37:32,877 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:37:32,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:37:32,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:37:32,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:37:32,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:37:32,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:37:32,878 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:37:32,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:37:32,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:37:32,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:37:32,879 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:37:32,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:37:32,880 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_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 797436b26f0180d1dd4048b2036765c1f76ffc9f34d72e35837e9efcc5780486 [2023-12-02 13:37:33,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:37:33,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:37:33,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:37:33,140 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:37:33,141 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:37:33,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/minepump_spec2_product48.cil.c [2023-12-02 13:37:36,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:37:36,232 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:37:36,233 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/sv-benchmarks/c/product-lines/minepump_spec2_product48.cil.c [2023-12-02 13:37:36,247 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/data/00b3715cf/86dcea1d0f33483e80af18ab9250632b/FLAG9574f30d7 [2023-12-02 13:37:36,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/data/00b3715cf/86dcea1d0f33483e80af18ab9250632b [2023-12-02 13:37:36,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:37:36,267 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:37:36,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:37:36,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:37:36,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:37:36,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eef1682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36, skipping insertion in model container [2023-12-02 13:37:36,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,329 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:37:36,601 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_bf337988-a7ee-49ee-a1bc-6285cb2312c7/sv-benchmarks/c/product-lines/minepump_spec2_product48.cil.c[17766,17779] [2023-12-02 13:37:36,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:37:36,625 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:37:36,637 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [49] [2023-12-02 13:37:36,639 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [150] [2023-12-02 13:37:36,639 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [188] [2023-12-02 13:37:36,639 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [261] [2023-12-02 13:37:36,640 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [484] [2023-12-02 13:37:36,640 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [524] [2023-12-02 13:37:36,640 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [890] [2023-12-02 13:37:36,641 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [899] [2023-12-02 13:37:36,702 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_bf337988-a7ee-49ee-a1bc-6285cb2312c7/sv-benchmarks/c/product-lines/minepump_spec2_product48.cil.c[17766,17779] [2023-12-02 13:37:36,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:37:36,728 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:37:36,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36 WrapperNode [2023-12-02 13:37:36,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:37:36,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:37:36,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:37:36,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:37:36,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,752 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,780 INFO L138 Inliner]: procedures = 57, calls = 103, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 199 [2023-12-02 13:37:36,781 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:37:36,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:37:36,782 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:37:36,782 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:37:36,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,797 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:37:36,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:37:36,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:37:36,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:37:36,815 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:37:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:36,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:37:36,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:37:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:37:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-12-02 13:37:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-12-02 13:37:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 13:37:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 13:37:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 13:37:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 13:37:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-12-02 13:37:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-12-02 13:37:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-12-02 13:37:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-12-02 13:37:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-12-02 13:37:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-12-02 13:37:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-12-02 13:37:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-12-02 13:37:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-12-02 13:37:36,907 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-12-02 13:37:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:37:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-12-02 13:37:36,908 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-12-02 13:37:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:37:36,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:37:36,992 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:37:36,995 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:37:37,289 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:37:37,418 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:37:37,419 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:37:37,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:37 BoogieIcfgContainer [2023-12-02 13:37:37,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:37:37,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:37:37,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:37:37,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:37:37,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:37:36" (1/3) ... [2023-12-02 13:37:37,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad348a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:37:37, skipping insertion in model container [2023-12-02 13:37:37,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (2/3) ... [2023-12-02 13:37:37,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad348a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:37:37, skipping insertion in model container [2023-12-02 13:37:37,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:37" (3/3) ... [2023-12-02 13:37:37,432 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product48.cil.c [2023-12-02 13:37:37,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:37:37,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:37:37,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:37:37,510 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;@1815ffd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:37:37,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:37:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 54 states have internal predecessors, (64), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 13:37:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:37:37,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:37,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:37,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:37,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash 410527053, now seen corresponding path program 1 times [2023-12-02 13:37:37,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:37,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876225513] [2023-12-02 13:37:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:37,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:37,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876225513] [2023-12-02 13:37:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876225513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:37,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:37:37,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467206098] [2023-12-02 13:37:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:37,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:37:37,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:37,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:37:37,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:37:37,763 INFO L87 Difference]: Start difference. First operand has 72 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 54 states have internal predecessors, (64), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:37,839 INFO L93 Difference]: Finished difference Result 142 states and 193 transitions. [2023-12-02 13:37:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:37:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 13:37:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:37,854 INFO L225 Difference]: With dead ends: 142 [2023-12-02 13:37:37,854 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 13:37:37,859 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 [2023-12-02 13:37:37,863 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:37,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 13:37:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-02 13:37:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 13:37:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-12-02 13:37:37,917 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 17 [2023-12-02 13:37:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:37,917 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-12-02 13:37:37,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-12-02 13:37:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:37:37,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:37,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:37,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:37:37,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:37,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:37,923 INFO L85 PathProgramCache]: Analyzing trace with hash -353929347, now seen corresponding path program 1 times [2023-12-02 13:37:37,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:37,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311485274] [2023-12-02 13:37:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:37,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:38,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:38,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311485274] [2023-12-02 13:37:38,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311485274] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:38,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:38,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:37:38,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107720946] [2023-12-02 13:37:38,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,041 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:38,091 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2023-12-02 13:37:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 13:37:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:38,093 INFO L225 Difference]: With dead ends: 106 [2023-12-02 13:37:38,093 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 13:37:38,094 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 [2023-12-02 13:37:38,096 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:38,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 13:37:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-02 13:37:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 13:37:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2023-12-02 13:37:38,109 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 18 [2023-12-02 13:37:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:38,109 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2023-12-02 13:37:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2023-12-02 13:37:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:37:38,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:38,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:38,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:37:38,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:38,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1315442762, now seen corresponding path program 1 times [2023-12-02 13:37:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:38,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170149413] [2023-12-02 13:37:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:38,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:38,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:38,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170149413] [2023-12-02 13:37:38,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170149413] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:38,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:38,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:37:38,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913594802] [2023-12-02 13:37:38,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:38,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:37:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:37:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:38,237 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:38,351 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2023-12-02 13:37:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:37:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-12-02 13:37:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:38,354 INFO L225 Difference]: With dead ends: 150 [2023-12-02 13:37:38,354 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 13:37:38,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:37:38,357 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 99 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:38,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 151 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:37:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 13:37:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2023-12-02 13:37:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 69 states have internal predecessors, (79), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (19), 14 states have call predecessors, (19), 18 states have call successors, (19) [2023-12-02 13:37:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2023-12-02 13:37:38,378 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 21 [2023-12-02 13:37:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:38,379 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2023-12-02 13:37:38,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2023-12-02 13:37:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 13:37:38,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:38,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:37:38,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:38,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash 186999119, now seen corresponding path program 1 times [2023-12-02 13:37:38,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:38,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819531614] [2023-12-02 13:37:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:38,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:38,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:38,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819531614] [2023-12-02 13:37:38,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819531614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:38,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:38,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:37:38,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311884281] [2023-12-02 13:37:38,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:38,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:37:38,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:37:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:38,515 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:38,640 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2023-12-02 13:37:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:37:38,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-12-02 13:37:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:38,643 INFO L225 Difference]: With dead ends: 216 [2023-12-02 13:37:38,644 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 13:37:38,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:37:38,647 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 41 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:38,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 162 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:37:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 13:37:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2023-12-02 13:37:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 92 states have internal predecessors, (105), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (28), 21 states have call predecessors, (28), 22 states have call successors, (28) [2023-12-02 13:37:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2023-12-02 13:37:38,672 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 24 [2023-12-02 13:37:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:38,673 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2023-12-02 13:37:38,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2023-12-02 13:37:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 13:37:38,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:38,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:38,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:37:38,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:38,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1783775523, now seen corresponding path program 1 times [2023-12-02 13:37:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341452696] [2023-12-02 13:37:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:38,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:38,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341452696] [2023-12-02 13:37:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341452696] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:38,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:38,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:37:38,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587960101] [2023-12-02 13:37:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:38,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,778 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:37:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:38,854 INFO L93 Difference]: Finished difference Result 210 states and 269 transitions. [2023-12-02 13:37:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-12-02 13:37:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:38,859 INFO L225 Difference]: With dead ends: 210 [2023-12-02 13:37:38,859 INFO L226 Difference]: Without dead ends: 208 [2023-12-02 13:37:38,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,861 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:38,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 128 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-02 13:37:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 198. [2023-12-02 13:37:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 128 states have (on average 1.2734375) internal successors, (163), 144 states have internal predecessors, (163), 38 states have call successors, (38), 32 states have call predecessors, (38), 31 states have return successors, (54), 34 states have call predecessors, (54), 38 states have call successors, (54) [2023-12-02 13:37:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2023-12-02 13:37:38,900 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 37 [2023-12-02 13:37:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:38,900 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2023-12-02 13:37:38,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:37:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2023-12-02 13:37:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 13:37:38,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:38,906 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:38,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:37:38,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:38,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2035445862, now seen corresponding path program 1 times [2023-12-02 13:37:38,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:38,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312458342] [2023-12-02 13:37:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:38,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:37:39,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312458342] [2023-12-02 13:37:39,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312458342] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078871752] [2023-12-02 13:37:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:39,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:39,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:39,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:39,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:37:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:39,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:37:39,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:37:39,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:39,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078871752] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:39,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:37:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-12-02 13:37:39,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985134689] [2023-12-02 13:37:39,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:39,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:39,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:37:39,551 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 13:37:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:39,614 INFO L93 Difference]: Finished difference Result 395 states and 509 transitions. [2023-12-02 13:37:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2023-12-02 13:37:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:39,617 INFO L225 Difference]: With dead ends: 395 [2023-12-02 13:37:39,617 INFO L226 Difference]: Without dead ends: 199 [2023-12-02 13:37:39,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:37:39,620 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 29 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:39,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 135 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-02 13:37:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2023-12-02 13:37:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 140 states have internal predecessors, (157), 37 states have call successors, (37), 31 states have call predecessors, (37), 31 states have return successors, (47), 33 states have call predecessors, (47), 37 states have call successors, (47) [2023-12-02 13:37:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 241 transitions. [2023-12-02 13:37:39,643 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 241 transitions. Word has length 76 [2023-12-02 13:37:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:39,644 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 241 transitions. [2023-12-02 13:37:39,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 13:37:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 241 transitions. [2023-12-02 13:37:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 13:37:39,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:39,647 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:39,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:39,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:37:39,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:39,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1240997617, now seen corresponding path program 1 times [2023-12-02 13:37:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:39,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841205321] [2023-12-02 13:37:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 13:37:39,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:39,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841205321] [2023-12-02 13:37:39,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841205321] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:39,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:39,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:37:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032223579] [2023-12-02 13:37:39,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:39,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:37:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:37:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:39,963 INFO L87 Difference]: Start difference. First operand 193 states and 241 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:37:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:40,103 INFO L93 Difference]: Finished difference Result 404 states and 518 transitions. [2023-12-02 13:37:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:37:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2023-12-02 13:37:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:40,106 INFO L225 Difference]: With dead ends: 404 [2023-12-02 13:37:40,106 INFO L226 Difference]: Without dead ends: 213 [2023-12-02 13:37:40,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:37:40,108 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:40,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 189 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:37:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-02 13:37:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2023-12-02 13:37:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 138 states have (on average 1.2463768115942029) internal successors, (172), 153 states have internal predecessors, (172), 37 states have call successors, (37), 32 states have call predecessors, (37), 33 states have return successors, (47), 35 states have call predecessors, (47), 37 states have call successors, (47) [2023-12-02 13:37:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 256 transitions. [2023-12-02 13:37:40,133 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 256 transitions. Word has length 73 [2023-12-02 13:37:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:40,133 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 256 transitions. [2023-12-02 13:37:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:37:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 256 transitions. [2023-12-02 13:37:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 13:37:40,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:40,136 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 13:37:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:37:40,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:40,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash -379717991, now seen corresponding path program 1 times [2023-12-02 13:37:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:40,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744088334] [2023-12-02 13:37:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:37:40,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744088334] [2023-12-02 13:37:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744088334] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219445068] [2023-12-02 13:37:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:40,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:40,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:40,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:37:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:40,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:37:40,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:37:41,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:41,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219445068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:41,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:37:41,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2023-12-02 13:37:41,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588479366] [2023-12-02 13:37:41,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:41,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:37:41,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:41,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:37:41,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:37:41,057 INFO L87 Difference]: Start difference. First operand 209 states and 256 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 13:37:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:41,680 INFO L93 Difference]: Finished difference Result 507 states and 625 transitions. [2023-12-02 13:37:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:37:41,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 76 [2023-12-02 13:37:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:41,684 INFO L225 Difference]: With dead ends: 507 [2023-12-02 13:37:41,684 INFO L226 Difference]: Without dead ends: 300 [2023-12-02 13:37:41,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-12-02 13:37:41,687 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 217 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:41,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 256 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:37:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-12-02 13:37:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 276. [2023-12-02 13:37:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 189 states have (on average 1.253968253968254) internal successors, (237), 206 states have internal predecessors, (237), 44 states have call successors, (44), 41 states have call predecessors, (44), 42 states have return successors, (56), 44 states have call predecessors, (56), 44 states have call successors, (56) [2023-12-02 13:37:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2023-12-02 13:37:41,721 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 76 [2023-12-02 13:37:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:41,722 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2023-12-02 13:37:41,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 13:37:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2023-12-02 13:37:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 13:37:41,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:41,725 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:41,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:41,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:41,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:41,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash -35269564, now seen corresponding path program 1 times [2023-12-02 13:37:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480491552] [2023-12-02 13:37:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:41,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 13:37:42,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:42,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480491552] [2023-12-02 13:37:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480491552] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094676460] [2023-12-02 13:37:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:42,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:42,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:42,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:42,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:37:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:42,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:37:42,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 13:37:42,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 13:37:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094676460] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:42,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:37:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 5] total 11 [2023-12-02 13:37:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329914898] [2023-12-02 13:37:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:42,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:37:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:37:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:37:42,554 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:37:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:42,738 INFO L93 Difference]: Finished difference Result 759 states and 938 transitions. [2023-12-02 13:37:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:37:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2023-12-02 13:37:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:42,745 INFO L225 Difference]: With dead ends: 759 [2023-12-02 13:37:42,745 INFO L226 Difference]: Without dead ends: 485 [2023-12-02 13:37:42,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:37:42,747 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 45 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:42,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 265 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:37:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-12-02 13:37:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 461. [2023-12-02 13:37:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 320 states have (on average 1.2375) internal successors, (396), 343 states have internal predecessors, (396), 72 states have call successors, (72), 67 states have call predecessors, (72), 68 states have return successors, (90), 71 states have call predecessors, (90), 72 states have call successors, (90) [2023-12-02 13:37:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 558 transitions. [2023-12-02 13:37:42,795 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 558 transitions. Word has length 79 [2023-12-02 13:37:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:42,795 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 558 transitions. [2023-12-02 13:37:42,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:37:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 558 transitions. [2023-12-02 13:37:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 13:37:42,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:42,798 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:42,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:37:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:42,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:42,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1843252742, now seen corresponding path program 1 times [2023-12-02 13:37:42,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:42,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061214857] [2023-12-02 13:37:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:37:43,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061214857] [2023-12-02 13:37:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061214857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720219989] [2023-12-02 13:37:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:43,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:43,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:43,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:37:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:43,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:37:43,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:43,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:43,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720219989] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:43,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:37:43,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 21 [2023-12-02 13:37:43,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740632063] [2023-12-02 13:37:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:37:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:37:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:37:43,726 INFO L87 Difference]: Start difference. First operand 461 states and 558 transitions. Second operand has 11 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 13:37:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:44,148 INFO L93 Difference]: Finished difference Result 939 states and 1178 transitions. [2023-12-02 13:37:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:37:44,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) Word has length 82 [2023-12-02 13:37:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:44,156 INFO L225 Difference]: With dead ends: 939 [2023-12-02 13:37:44,156 INFO L226 Difference]: Without dead ends: 665 [2023-12-02 13:37:44,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2023-12-02 13:37:44,159 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 46 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:44,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 744 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:37:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-12-02 13:37:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 637. [2023-12-02 13:37:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 447 states have (on average 1.2348993288590604) internal successors, (552), 474 states have internal predecessors, (552), 97 states have call successors, (97), 91 states have call predecessors, (97), 92 states have return successors, (134), 95 states have call predecessors, (134), 97 states have call successors, (134) [2023-12-02 13:37:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 783 transitions. [2023-12-02 13:37:44,232 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 783 transitions. Word has length 82 [2023-12-02 13:37:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:44,233 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 783 transitions. [2023-12-02 13:37:44,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 13:37:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 783 transitions. [2023-12-02 13:37:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 13:37:44,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:44,237 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 13:37:44,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:37:44,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:44,440 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:44,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1573233888, now seen corresponding path program 1 times [2023-12-02 13:37:44,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:44,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002322311] [2023-12-02 13:37:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:44,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:37:44,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002322311] [2023-12-02 13:37:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002322311] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072677923] [2023-12-02 13:37:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:44,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:44,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:37:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:44,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:37:44,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:37:45,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 13:37:45,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072677923] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:45,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [526087036] [2023-12-02 13:37:45,655 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2023-12-02 13:37:45,655 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:45,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:45,665 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:45,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:48,090 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 153 for LOIs [2023-12-02 13:37:48,188 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 40 for LOIs [2023-12-02 13:37:48,503 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 15 for LOIs [2023-12-02 13:37:48,584 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 42 for LOIs [2023-12-02 13:37:48,682 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 8 for LOIs [2023-12-02 13:37:48,684 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 15 for LOIs [2023-12-02 13:37:48,687 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 10 for LOIs [2023-12-02 13:37:48,688 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:37:55,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10180#(and (<= |timeShift___utac_acc__Specification2_spec__2_~tmp~5#1| 1) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~2#1|) (<= 0 (+ |timeShift___utac_acc__Specification2_spec__2_~tmp___0~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~2#1| 2147483647) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~2#1| 0)) (<= 0 |timeShift___utac_acc__Specification2_spec__2_~tmp~5#1|) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~5#1| ~methaneLevelCritical~0) (not (= ~methAndRunningLastTime~0 0)) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~5#1| 0)))' at error location [2023-12-02 13:37:55,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:37:55,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:37:55,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2023-12-02 13:37:55,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191408756] [2023-12-02 13:37:55,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:37:55,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 13:37:55,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:55,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 13:37:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=4405, Unknown=0, NotChecked=0, Total=4830 [2023-12-02 13:37:55,774 INFO L87 Difference]: Start difference. First operand 637 states and 783 transitions. Second operand has 31 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 7 states have call successors, (28), 5 states have call predecessors, (28), 14 states have return successors, (30), 15 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-02 13:37:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:58,990 INFO L93 Difference]: Finished difference Result 2105 states and 2907 transitions. [2023-12-02 13:37:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-02 13:37:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 7 states have call successors, (28), 5 states have call predecessors, (28), 14 states have return successors, (30), 15 states have call predecessors, (30), 7 states have call successors, (30) Word has length 85 [2023-12-02 13:37:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:59,002 INFO L225 Difference]: With dead ends: 2105 [2023-12-02 13:37:59,003 INFO L226 Difference]: Without dead ends: 1427 [2023-12-02 13:37:59,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1264, Invalid=13256, Unknown=0, NotChecked=0, Total=14520 [2023-12-02 13:37:59,011 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 816 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:59,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 1477 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 13:37:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2023-12-02 13:37:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 773. [2023-12-02 13:37:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 540 states have (on average 1.212962962962963) internal successors, (655), 568 states have internal predecessors, (655), 117 states have call successors, (117), 113 states have call predecessors, (117), 115 states have return successors, (152), 115 states have call predecessors, (152), 117 states have call successors, (152) [2023-12-02 13:37:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 924 transitions. [2023-12-02 13:37:59,124 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 924 transitions. Word has length 85 [2023-12-02 13:37:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:59,125 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 924 transitions. [2023-12-02 13:37:59,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 7 states have call successors, (28), 5 states have call predecessors, (28), 14 states have return successors, (30), 15 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-02 13:37:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 924 transitions. [2023-12-02 13:37:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 13:37:59,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:59,129 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 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, 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] [2023-12-02 13:37:59,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:37:59,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:59,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:37:59,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1092566672, now seen corresponding path program 1 times [2023-12-02 13:37:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:59,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478077672] [2023-12-02 13:37:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 13:37:59,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478077672] [2023-12-02 13:37:59,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478077672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:59,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56186281] [2023-12-02 13:37:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:59,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:59,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:37:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:59,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 13:37:59,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 13:37:59,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:59,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56186281] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:59,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:37:59,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 13 [2023-12-02 13:37:59,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917543342] [2023-12-02 13:37:59,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:59,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:37:59,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:59,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:37:59,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:37:59,684 INFO L87 Difference]: Start difference. First operand 773 states and 924 transitions. Second operand has 11 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (19), 6 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 13:38:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:00,015 INFO L93 Difference]: Finished difference Result 1649 states and 1987 transitions. [2023-12-02 13:38:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:38:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (19), 6 states have call predecessors, (19), 3 states have call successors, (19) Word has length 122 [2023-12-02 13:38:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:00,017 INFO L225 Difference]: With dead ends: 1649 [2023-12-02 13:38:00,017 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 13:38:00,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:38:00,021 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 51 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:00,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 310 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:38:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 13:38:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 13:38:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:38:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 13:38:00,022 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 122 [2023-12-02 13:38:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:00,022 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 13:38:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (19), 6 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 13:38:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 13:38:00,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 13:38:00,025 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 13:38:00,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:38:00,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:00,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 13:38:04,878 INFO L899 garLoopResultBuilder]: For program point deactivatePumpEXIT(lines 378 385) no Hoare annotation was computed. [2023-12-02 13:38:04,878 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 378 385) the Hoare annotation is: (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) (not (= 1 ~systemActive~0)) (= |old(~pumpRunning~0)| 0)) [2023-12-02 13:38:04,878 INFO L899 garLoopResultBuilder]: For program point processEnvironment__wrappee__baseEXIT(lines 294 300) no Hoare annotation was computed. [2023-12-02 13:38:04,879 INFO L902 garLoopResultBuilder]: At program point processEnvironment__wrappee__baseFINAL(lines 294 300) the Hoare annotation is: true [2023-12-02 13:38:04,879 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 83 94) the Hoare annotation is: (let ((.cse2 (= |old(~methaneLevelCritical~0)| 0))) (let ((.cse1 (not (= 1 ~systemActive~0))) (.cse5 (not .cse2)) (.cse0 (not (= ~pumpRunning~0 0))) (.cse3 (= ~methaneLevelCritical~0 0)) (.cse4 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 .cse1 .cse2 (not .cse3) (< ~waterLevel~0 2) .cse4) (or .cse5 .cse3 .cse1 .cse4) (or .cse5 .cse0 .cse3 .cse4 (not (= 0 ~systemActive~0)))))) [2023-12-02 13:38:04,879 INFO L899 garLoopResultBuilder]: For program point changeMethaneLevelEXIT(lines 83 94) no Hoare annotation was computed. [2023-12-02 13:38:04,879 INFO L899 garLoopResultBuilder]: For program point cleanupEXIT(lines 901 930) no Hoare annotation was computed. [2023-12-02 13:38:04,879 INFO L899 garLoopResultBuilder]: For program point L926(lines 901 930) no Hoare annotation was computed. [2023-12-02 13:38:04,879 INFO L899 garLoopResultBuilder]: For program point L922(line 922) no Hoare annotation was computed. [2023-12-02 13:38:04,879 INFO L899 garLoopResultBuilder]: For program point L915(lines 915 919) no Hoare annotation was computed. [2023-12-02 13:38:04,879 INFO L902 garLoopResultBuilder]: At program point L915-1(lines 915 919) the Hoare annotation is: true [2023-12-02 13:38:04,879 INFO L902 garLoopResultBuilder]: At program point L911-2(lines 911 925) the Hoare annotation is: true [2023-12-02 13:38:04,880 INFO L902 garLoopResultBuilder]: At program point L907(line 907) the Hoare annotation is: true [2023-12-02 13:38:04,880 INFO L899 garLoopResultBuilder]: For program point L907-1(line 907) no Hoare annotation was computed. [2023-12-02 13:38:04,880 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 901 930) the Hoare annotation is: true [2023-12-02 13:38:04,880 INFO L899 garLoopResultBuilder]: For program point L895(line 895) no Hoare annotation was computed. [2023-12-02 13:38:04,880 INFO L899 garLoopResultBuilder]: For program point L507(lines 507 517) no Hoare annotation was computed. [2023-12-02 13:38:04,880 INFO L899 garLoopResultBuilder]: For program point L503(lines 503 520) no Hoare annotation was computed. [2023-12-02 13:38:04,880 INFO L895 garLoopResultBuilder]: At program point L342(line 342) the Hoare annotation is: (and (or (not (= |old(~methAndRunningLastTime~0)| 0)) (not (= 1 ~systemActive~0)) (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) (= ~methAndRunningLastTime~0 0) (not (= ~pumpRunning~0 0)) (= ~methaneLevelCritical~0 0) (= |timeShift_processEnvironment_~tmp~2#1| 0) (or (and (<= ~waterLevel~0 0) (= |old(~waterLevel~0)| ~waterLevel~0)) (< ~waterLevel~0 |old(~waterLevel~0)|)))) (or (not (= |old(~pumpRunning~0)| 0)) (not (= 0 ~systemActive~0)))) [2023-12-02 13:38:04,880 INFO L899 garLoopResultBuilder]: For program point L503-1(lines 495 523) no Hoare annotation was computed. [2023-12-02 13:38:04,880 INFO L895 garLoopResultBuilder]: At program point L338(line 338) the Hoare annotation is: (and (or (not (= |old(~methAndRunningLastTime~0)| 0)) (not (= 1 ~systemActive~0)) (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) (not (= |timeShift_processEnvironment_~tmp~2#1| 0)) (= |timeShift_processEnvironment_~tmp~2#1| ~methaneLevelCritical~0) (not (= ~pumpRunning~0 0)) (or (and (<= ~waterLevel~0 0) (= |old(~waterLevel~0)| ~waterLevel~0)) (< ~waterLevel~0 |old(~waterLevel~0)|)))) (or (not (= |old(~pumpRunning~0)| 0)) (not (= 0 ~systemActive~0)))) [2023-12-02 13:38:04,881 INFO L895 garLoopResultBuilder]: At program point L334(line 334) the Hoare annotation is: (and (or (not (= |old(~methAndRunningLastTime~0)| 0)) (not (= 1 ~systemActive~0)) (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) (= ~methAndRunningLastTime~0 0) (not (= ~pumpRunning~0 0)) (or (and (<= ~waterLevel~0 0) (= |old(~waterLevel~0)| ~waterLevel~0)) (< ~waterLevel~0 |old(~waterLevel~0)|)))) (or (not (= |old(~pumpRunning~0)| 0)) (not (= 0 ~systemActive~0)))) [2023-12-02 13:38:04,881 INFO L899 garLoopResultBuilder]: For program point L334-1(line 334) no Hoare annotation was computed. [2023-12-02 13:38:04,881 INFO L899 garLoopResultBuilder]: For program point L508(lines 508 514) no Hoare annotation was computed. [2023-12-02 13:38:04,881 INFO L895 garLoopResultBuilder]: At program point L347(line 347) the Hoare annotation is: (let ((.cse0 (= |old(~pumpRunning~0)| 0))) (and (or (not (= |old(~methAndRunningLastTime~0)| 0)) (not (= 1 ~systemActive~0)) (and (= ~pumpRunning~0 0) (= ~methAndRunningLastTime~0 0) .cse0 (or (< ~waterLevel~0 |old(~waterLevel~0)|) (= |old(~waterLevel~0)| ~waterLevel~0)))) (or (not .cse0) (not (= 0 ~systemActive~0))))) [2023-12-02 13:38:04,881 INFO L899 garLoopResultBuilder]: For program point L347-1(lines 328 352) no Hoare annotation was computed. [2023-12-02 13:38:04,881 INFO L899 garLoopResultBuilder]: For program point L281-1(lines 281 287) no Hoare annotation was computed. [2023-12-02 13:38:04,881 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 270 293) the Hoare annotation is: (let ((.cse2 (not (= |old(~pumpRunning~0)| 0))) (.cse3 (not (= 0 ~systemActive~0))) (.cse0 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse1 (not (= 1 ~systemActive~0)))) (and (or .cse0 .cse1 (<= 2 ~waterLevel~0) (< |old(~waterLevel~0)| 2)) (or .cse2 (= ~pumpRunning~0 0) .cse3) (or (< 1 |old(~waterLevel~0)|) .cse2 (<= ~waterLevel~0 1) .cse3) (or (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) (= ~methAndRunningLastTime~0 0) (<= ~waterLevel~0 |old(~waterLevel~0)|)) .cse0 .cse1))) [2023-12-02 13:38:04,882 INFO L895 garLoopResultBuilder]: At program point L501(line 501) the Hoare annotation is: (let ((.cse6 (= |old(~pumpRunning~0)| 0)) (.cse9 (= ~methAndRunningLastTime~0 0)) (.cse1 (= ~pumpRunning~0 0)) (.cse13 (= 1 ~systemActive~0)) (.cse10 (<= ~waterLevel~0 |old(~waterLevel~0)|)) (.cse11 (= ~methaneLevelCritical~0 0))) (let ((.cse2 (not (= 0 ~systemActive~0))) (.cse7 (not .cse11)) (.cse3 (not (= |old(~methAndRunningLastTime~0)| 0))) (.cse4 (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse9 (not .cse1) .cse11 .cse13 .cse10)) (.cse5 (not .cse13)) (.cse0 (not .cse6)) (.cse8 (<= ~waterLevel~0 1))) (and (or .cse0 .cse1 .cse2) (or .cse3 .cse4 .cse5 .cse6 .cse7) (or (< 1 |old(~waterLevel~0)|) .cse0 .cse8 .cse2) (let ((.cse12 (or (< ~waterLevel~0 |old(~waterLevel~0)|) (= |old(~waterLevel~0)| ~waterLevel~0)))) (or (and .cse9 (<= 2 ~waterLevel~0) .cse10 (or (and .cse1 .cse7) (and .cse11 (= ~pumpRunning~0 1)))) .cse3 .cse4 .cse5 (and .cse0 .cse1 .cse12) (and .cse1 .cse9 .cse8 .cse12)))))) [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point L501-1(line 501) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point L274-1(lines 273 292) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point L336(lines 336 344) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point L332(lines 332 349) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point timeShiftEXIT(lines 270 293) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION(line 895) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 95 103) the Hoare annotation is: true [2023-12-02 13:38:04,882 INFO L899 garLoopResultBuilder]: For program point isMethaneLevelCriticalEXIT(lines 95 103) no Hoare annotation was computed. [2023-12-02 13:38:04,882 INFO L895 garLoopResultBuilder]: At program point L225(line 225) the Hoare annotation is: (let ((.cse2 (= 1 ~systemActive~0)) (.cse4 (= ~pumpRunning~0 0)) (.cse0 (= ~methAndRunningLastTime~0 0)) (.cse1 (= |ULTIMATE.start_main_~tmp~9#1| 1)) (.cse3 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and .cse0 (= ~methaneLevelCritical~0 0) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse3 (= 0 ~systemActive~0)))) [2023-12-02 13:38:04,882 INFO L895 garLoopResultBuilder]: At program point L250(lines 203 252) the Hoare annotation is: (let ((.cse2 (= 1 ~systemActive~0)) (.cse4 (= ~pumpRunning~0 0)) (.cse0 (= ~methAndRunningLastTime~0 0)) (.cse1 (= |ULTIMATE.start_main_~tmp~9#1| 1)) (.cse3 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and .cse0 (= ~methaneLevelCritical~0 0) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse3 (= 0 ~systemActive~0)))) [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L213(lines 213 219) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L213-1(lines 213 219) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L465(lines 465 471) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L465-1(lines 465 471) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L256(lines 193 260) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L223(lines 223 229) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L223-1(lines 223 229) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L983(lines 983 990) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L895 garLoopResultBuilder]: At program point L215(line 215) the Hoare annotation is: (let ((.cse2 (= 1 ~systemActive~0)) (.cse4 (= ~pumpRunning~0 0)) (.cse0 (= ~methAndRunningLastTime~0 0)) (.cse1 (= |ULTIMATE.start_main_~tmp~9#1| 1)) (.cse3 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and .cse0 (= ~methaneLevelCritical~0 0) .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse0 .cse1 .cse3 (= 0 ~systemActive~0)))) [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point L983-2(lines 983 990) no Hoare annotation was computed. [2023-12-02 13:38:04,883 INFO L895 garLoopResultBuilder]: At program point L467(line 467) the Hoare annotation is: (and (not (= ~pumpRunning~0 0)) (= |ULTIMATE.start_main_~tmp~9#1| 1) (= 1 ~systemActive~0) (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) [2023-12-02 13:38:04,883 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 13:38:04,884 INFO L895 garLoopResultBuilder]: At program point L253(lines 202 254) the Hoare annotation is: false [2023-12-02 13:38:04,884 INFO L899 garLoopResultBuilder]: For program point L241(lines 241 247) no Hoare annotation was computed. [2023-12-02 13:38:04,884 INFO L895 garLoopResultBuilder]: At program point L241-2(lines 233 248) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~tmp~9#1| 1)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) .cse0 .cse1 (= 0 ~systemActive~0)) (and (= ~methAndRunningLastTime~0 0) .cse0 (= 1 ~systemActive~0) .cse1))) [2023-12-02 13:38:04,884 INFO L899 garLoopResultBuilder]: For program point L204(lines 203 252) no Hoare annotation was computed. [2023-12-02 13:38:04,884 INFO L899 garLoopResultBuilder]: For program point L233(lines 233 248) no Hoare annotation was computed. [2023-12-02 13:38:04,884 INFO L899 garLoopResultBuilder]: For program point waterRiseEXIT(lines 71 82) no Hoare annotation was computed. [2023-12-02 13:38:04,884 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 71 82) the Hoare annotation is: (let ((.cse5 (= ~methaneLevelCritical~0 0))) (let ((.cse2 (<= ~waterLevel~0 |old(~waterLevel~0)|)) (.cse0 (not (= ~pumpRunning~0 0))) (.cse4 (not .cse5)) (.cse1 (not (= 1 ~systemActive~0))) (.cse3 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 .cse1 .cse2 .cse3) (or .cse1 .cse4 .cse2 .cse3) (or (and (or .cse0 .cse5) (or .cse4 (not (= ~pumpRunning~0 1)))) .cse1 (<= 2 ~waterLevel~0) (< |old(~waterLevel~0)| 2) .cse3)))) [2023-12-02 13:38:04,884 INFO L895 garLoopResultBuilder]: At program point L316(line 316) the Hoare annotation is: (let ((.cse1 (= |old(~pumpRunning~0)| 0)) (.cse0 (not (= 1 ~systemActive~0))) (.cse2 (not (= ~methAndRunningLastTime~0 0)))) (and (or .cse0 .cse1 (not (= ~methaneLevelCritical~0 0)) .cse2) (or (not .cse1) (and (= ~pumpRunning~0 0) (<= ~waterLevel~0 1) (= |processEnvironment__wrappee__methaneQuery_~tmp~1#1| 0)) .cse0 .cse2))) [2023-12-02 13:38:04,884 INFO L899 garLoopResultBuilder]: For program point L310(lines 310 318) no Hoare annotation was computed. [2023-12-02 13:38:04,884 INFO L899 garLoopResultBuilder]: For program point L306(lines 306 323) no Hoare annotation was computed. [2023-12-02 13:38:04,885 INFO L895 garLoopResultBuilder]: At program point L366(line 366) the Hoare annotation is: (let ((.cse1 (not (= 1 ~systemActive~0))) (.cse0 (= |old(~pumpRunning~0)| 0)) (.cse2 (not (= ~methAndRunningLastTime~0 0)))) (and (or (not .cse0) .cse1 (and (= ~pumpRunning~0 0) (= |processEnvironment__wrappee__methaneQuery_~tmp~1#1| 1) (<= 2 ~waterLevel~0)) .cse2) (or .cse1 .cse0 (not (= ~methaneLevelCritical~0 0)) .cse2))) [2023-12-02 13:38:04,885 INFO L899 garLoopResultBuilder]: For program point L366-1(line 366) no Hoare annotation was computed. [2023-12-02 13:38:04,885 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 302 326) the Hoare annotation is: (let ((.cse0 (not (= 1 ~systemActive~0))) (.cse1 (not (= ~methAndRunningLastTime~0 0)))) (and (or (not (= |old(~pumpRunning~0)| 0)) (= ~pumpRunning~0 0) .cse0 .cse1) (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse0 (not (= ~methaneLevelCritical~0 0)) .cse1))) [2023-12-02 13:38:04,885 INFO L895 garLoopResultBuilder]: At program point L321(line 321) the Hoare annotation is: (let ((.cse0 (not (= 1 ~systemActive~0))) (.cse1 (not (= ~methAndRunningLastTime~0 0)))) (and (or (not (= |old(~pumpRunning~0)| 0)) .cse0 .cse1) (or (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse0 (not (= ~methaneLevelCritical~0 0)) .cse1))) [2023-12-02 13:38:04,885 INFO L899 garLoopResultBuilder]: For program point L321-1(lines 302 326) no Hoare annotation was computed. [2023-12-02 13:38:04,885 INFO L899 garLoopResultBuilder]: For program point processEnvironment__wrappee__methaneQueryEXIT(lines 302 326) no Hoare annotation was computed. [2023-12-02 13:38:04,885 INFO L899 garLoopResultBuilder]: For program point isMethaneAlarmEXIT(lines 386 396) no Hoare annotation was computed. [2023-12-02 13:38:04,885 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 386 396) the Hoare annotation is: true [2023-12-02 13:38:04,885 INFO L902 garLoopResultBuilder]: At program point L391(line 391) the Hoare annotation is: true [2023-12-02 13:38:04,885 INFO L899 garLoopResultBuilder]: For program point L391-1(line 391) no Hoare annotation was computed. [2023-12-02 13:38:04,887 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:04,889 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 13:38:04,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:38:04 BoogieIcfgContainer [2023-12-02 13:38:04,899 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 13:38:04,899 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 13:38:04,899 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 13:38:04,899 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 13:38:04,900 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:37" (3/4) ... [2023-12-02 13:38:04,901 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure deactivatePump [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__base [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure changeMethaneLevel [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure cleanup [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure timeShift [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure isMethaneLevelCritical [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure waterRise [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__methaneQuery [2023-12-02 13:38:04,904 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure isMethaneAlarm [2023-12-02 13:38:04,911 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 43 nodes and edges [2023-12-02 13:38:04,912 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-12-02 13:38:04,913 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 13:38:04,913 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 13:38:04,914 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 13:38:04,938 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((!((\old(methAndRunningLastTime) == 0)) || !((1 == systemActive))) || (2 <= waterLevel)) || (\old(waterLevel) < 2)) && ((!((\old(pumpRunning) == 0)) || (pumpRunning == 0)) || !((0 == systemActive)))) && ((((1 < \old(waterLevel)) || !((\old(pumpRunning) == 0))) || (waterLevel <= 1)) || !((0 == systemActive)))) && (((((pumpRunning == \old(pumpRunning)) && (methAndRunningLastTime == 0)) && (waterLevel <= \old(waterLevel))) || !((\old(methAndRunningLastTime) == 0))) || !((1 == systemActive)))) [2023-12-02 13:38:04,975 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((!((\old(methAndRunningLastTime) == 0)) || !((1 == systemActive))) || (2 <= waterLevel)) || (\old(waterLevel) < 2)) && ((!((\old(pumpRunning) == 0)) || (pumpRunning == 0)) || !((0 == systemActive)))) && ((((1 < \old(waterLevel)) || !((\old(pumpRunning) == 0))) || (waterLevel <= 1)) || !((0 == systemActive)))) && (((((pumpRunning == \old(pumpRunning)) && (methAndRunningLastTime == 0)) && (waterLevel <= \old(waterLevel))) || !((\old(methAndRunningLastTime) == 0))) || !((1 == systemActive)))) [2023-12-02 13:38:05,023 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 13:38:05,023 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 13:38:05,023 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 13:38:05,024 INFO L158 Benchmark]: Toolchain (without parser) took 28757.46ms. Allocated memory was 148.9MB in the beginning and 476.1MB in the end (delta: 327.2MB). Free memory was 110.8MB in the beginning and 261.8MB in the end (delta: -151.0MB). Peak memory consumption was 178.5MB. Max. memory is 16.1GB. [2023-12-02 13:38:05,024 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 61.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:38:05,025 INFO L158 Benchmark]: CACSL2BoogieTranslator took 461.28ms. Allocated memory is still 148.9MB. Free memory was 110.4MB in the beginning and 90.7MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 13:38:05,025 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.67ms. Allocated memory is still 148.9MB. Free memory was 90.7MB in the beginning and 88.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:38:05,025 INFO L158 Benchmark]: Boogie Preprocessor took 32.34ms. Allocated memory is still 148.9MB. Free memory was 88.6MB in the beginning and 87.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:38:05,025 INFO L158 Benchmark]: RCFGBuilder took 606.82ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 87.0MB in the beginning and 151.0MB in the end (delta: -64.0MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2023-12-02 13:38:05,026 INFO L158 Benchmark]: TraceAbstraction took 27474.27ms. Allocated memory was 180.4MB in the beginning and 476.1MB in the end (delta: 295.7MB). Free memory was 150.0MB in the beginning and 269.2MB in the end (delta: -119.2MB). Peak memory consumption was 293.9MB. Max. memory is 16.1GB. [2023-12-02 13:38:05,026 INFO L158 Benchmark]: Witness Printer took 124.22ms. Allocated memory is still 476.1MB. Free memory was 269.2MB in the beginning and 261.8MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-12-02 13:38:05,028 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 109.1MB. Free memory is still 61.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 461.28ms. Allocated memory is still 148.9MB. Free memory was 110.4MB in the beginning and 90.7MB in the end (delta: 19.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.67ms. Allocated memory is still 148.9MB. Free memory was 90.7MB in the beginning and 88.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.34ms. Allocated memory is still 148.9MB. Free memory was 88.6MB in the beginning and 87.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 606.82ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 87.0MB in the beginning and 151.0MB in the end (delta: -64.0MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * TraceAbstraction took 27474.27ms. Allocated memory was 180.4MB in the beginning and 476.1MB in the end (delta: 295.7MB). Free memory was 150.0MB in the beginning and 269.2MB in the end (delta: -119.2MB). Peak memory consumption was 293.9MB. Max. memory is 16.1GB. * Witness Printer took 124.22ms. Allocated memory is still 476.1MB. Free memory was 269.2MB in the beginning and 261.8MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 49]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [49] - GenericResultAtLocation [Line: 150]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [150] - GenericResultAtLocation [Line: 188]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [188] - GenericResultAtLocation [Line: 261]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [261] - GenericResultAtLocation [Line: 484]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [484] - GenericResultAtLocation [Line: 524]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [524] - GenericResultAtLocation [Line: 890]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [890] - GenericResultAtLocation [Line: 899]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [899] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 895]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27.4s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1488 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1456 mSDsluCounter, 3998 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3107 mSDsCounter, 678 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3838 IncrementalHoareTripleChecker+Invalid, 4516 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 678 mSolverCounterUnsat, 891 mSDtfsCounter, 3838 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 942 GetRequests, 732 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5156 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=773occurred in iteration=11, InterpolantAutomatonStates: 135, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 757 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 1414 PreInvPairs, 1534 NumberOfFragments, 859 HoareAnnotationTreeSize, 1414 FomulaSimplifications, 18261 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 27 FomulaSimplificationsInter, 20279 FormulaSimplificationTreeSizeReductionInter, 3.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1230 NumberOfCodeBlocks, 1230 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1374 ConstructedInterpolants, 0 QuantifiedInterpolants, 3155 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1938 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 20 InterpolantComputations, 11 PerfectInterpolantSequences, 701/749 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 202]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 911]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 203]: Loop Invariant Derived loop invariant: (((((((methAndRunningLastTime == 0) && (methaneLevelCritical == 0)) && (tmp == 1)) && (1 == systemActive)) && (splverifierCounter == 0)) || (((((pumpRunning == 0) && (methAndRunningLastTime == 0)) && (tmp == 1)) && (1 == systemActive)) && (splverifierCounter == 0))) || (((((pumpRunning == 0) && (methAndRunningLastTime == 0)) && (tmp == 1)) && (splverifierCounter == 0)) && (0 == systemActive))) - InvariantResult [Line: 270]: Loop Invariant Derived loop invariant: ((((((!((\old(methAndRunningLastTime) == 0)) || !((1 == systemActive))) || (2 <= waterLevel)) || (\old(waterLevel) < 2)) && ((!((\old(pumpRunning) == 0)) || (pumpRunning == 0)) || !((0 == systemActive)))) && ((((1 < \old(waterLevel)) || !((\old(pumpRunning) == 0))) || (waterLevel <= 1)) || !((0 == systemActive)))) && (((((pumpRunning == \old(pumpRunning)) && (methAndRunningLastTime == 0)) && (waterLevel <= \old(waterLevel))) || !((\old(methAndRunningLastTime) == 0))) || !((1 == systemActive)))) RESULT: Ultimate proved your program to be correct! [2023-12-02 13:38:05,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf337988-a7ee-49ee-a1bc-6285cb2312c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE