./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec1_product42.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec1_product42.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 f8aef606697b9aeff574acbbe43b28a142b9105524bb5bbab5e1458056090146 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:10:46,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:10:46,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:10:46,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:10:46,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:10:46,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:10:46,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:10:46,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:10:46,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:10:46,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:10:46,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:10:46,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:10:46,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:10:46,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:10:46,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:10:46,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:10:46,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:10:46,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:10:46,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:10:46,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:10:46,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:10:46,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:10:46,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:10:46,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:10:46,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:10:46,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:10:46,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:10:46,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:10:46,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:10:46,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:10:46,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:10:46,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:10:46,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:10:46,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:10:46,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:10:46,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:10:46,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:10:46,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:10:46,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:10:46,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:10:46,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:10:46,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:10:46,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:10:46,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:10:46,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:10:46,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:10:46,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:10:46,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:10:46,186 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:10:46,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:10:46,186 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:10:46,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:10:46,188 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:10:46,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:10:46,189 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:10:46,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:10:46,189 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:10:46,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:10:46,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:10:46,190 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:10:46,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:10:46,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:10:46,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:10:46,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:10:46,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:10:46,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:10:46,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:10:46,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:10:46,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:10:46,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:10:46,195 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:10:46,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:10:46,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:10:46,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:10:46,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:46,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:10:46,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:10:46,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:10:46,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:10:46,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:10:46,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:10:46,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:10:46,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:10:46,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8aef606697b9aeff574acbbe43b28a142b9105524bb5bbab5e1458056090146 [2022-11-19 08:10:46,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:10:46,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:10:46,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:10:46,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:10:46,511 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:10:46,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/minepump_spec1_product42.cil.c [2022-11-19 08:10:46,594 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/data/d4dba3541/e4f75337530448deb54cc6c90f36f4a5/FLAG4340c1776 [2022-11-19 08:10:47,102 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:10:47,102 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/sv-benchmarks/c/product-lines/minepump_spec1_product42.cil.c [2022-11-19 08:10:47,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/data/d4dba3541/e4f75337530448deb54cc6c90f36f4a5/FLAG4340c1776 [2022-11-19 08:10:47,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/data/d4dba3541/e4f75337530448deb54cc6c90f36f4a5 [2022-11-19 08:10:47,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:10:47,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:10:47,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:47,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:10:47,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:10:47,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f692147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47, skipping insertion in model container [2022-11-19 08:10:47,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:10:47,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:10:47,808 WARN L234 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_a11ee950-7eaf-4ceb-a020-651bd4d5a718/sv-benchmarks/c/product-lines/minepump_spec1_product42.cil.c[15994,16007] [2022-11-19 08:10:47,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:47,832 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:10:47,903 WARN L234 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_a11ee950-7eaf-4ceb-a020-651bd4d5a718/sv-benchmarks/c/product-lines/minepump_spec1_product42.cil.c[15994,16007] [2022-11-19 08:10:47,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:10:47,926 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:10:47,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47 WrapperNode [2022-11-19 08:10:47,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:10:47,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:47,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:10:47,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:10:47,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,973 INFO L138 Inliner]: procedures = 54, calls = 96, calls flagged for inlining = 22, calls inlined = 19, statements flattened = 181 [2022-11-19 08:10:47,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:10:47,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:10:47,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:10:47,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:10:47,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:47,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:48,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:48,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:48,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:10:48,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:10:48,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:10:48,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:10:48,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (1/1) ... [2022-11-19 08:10:48,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:10:48,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:48,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:10:48,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:10:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:10:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-19 08:10:48,091 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-19 08:10:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:10:48,091 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:10:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:10:48,091 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:10:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2022-11-19 08:10:48,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2022-11-19 08:10:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-19 08:10:48,092 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-19 08:10:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:10:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-19 08:10:48,092 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-19 08:10:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:10:48,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:10:48,173 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:10:48,175 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:10:48,489 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:10:48,656 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:10:48,656 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:10:48,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:48 BoogieIcfgContainer [2022-11-19 08:10:48,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:10:48,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:10:48,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:10:48,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:10:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:10:47" (1/3) ... [2022-11-19 08:10:48,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e0cfee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:10:48, skipping insertion in model container [2022-11-19 08:10:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:10:47" (2/3) ... [2022-11-19 08:10:48,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e0cfee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:10:48, skipping insertion in model container [2022-11-19 08:10:48,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:48" (3/3) ... [2022-11-19 08:10:48,674 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product42.cil.c [2022-11-19 08:10:48,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:10:48,698 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:10:48,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:10:48,787 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=LoopsAndPotentialCycles, 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;@6a5dfb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:10:48,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:10:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.40625) internal successors, (45), 38 states have internal predecessors, (45), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:10:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:10:48,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:48,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:48,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1411838828, now seen corresponding path program 1 times [2022-11-19 08:10:48,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:48,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188867551] [2022-11-19 08:10:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:48,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:49,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:49,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188867551] [2022-11-19 08:10:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188867551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:49,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:10:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615686854] [2022-11-19 08:10:49,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:49,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:10:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:10:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:10:49,054 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.40625) internal successors, (45), 38 states have internal predecessors, (45), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:49,169 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2022-11-19 08:10:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:10:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-19 08:10:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:49,181 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:10:49,182 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 08:10:49,185 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 [2022-11-19 08:10:49,189 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:49,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 08:10:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-19 08:10:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 08:10:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-19 08:10:49,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 16 [2022-11-19 08:10:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:49,248 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-19 08:10:49,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-19 08:10:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:10:49,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:49,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:49,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:10:49,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash -71607514, now seen corresponding path program 1 times [2022-11-19 08:10:49,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:49,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958057048] [2022-11-19 08:10:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:49,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:49,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958057048] [2022-11-19 08:10:49,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958057048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:49,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:49,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:49,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267171731] [2022-11-19 08:10:49,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:49,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:49,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:49,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:49,428 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:49,502 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-11-19 08:10:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-19 08:10:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:49,505 INFO L225 Difference]: With dead ends: 67 [2022-11-19 08:10:49,506 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:10:49,507 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 [2022-11-19 08:10:49,509 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:49,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 57 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:10:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 08:10:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:10:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-19 08:10:49,524 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-11-19 08:10:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-19 08:10:49,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:10:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-19 08:10:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:10:49,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:49,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:49,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:10:49,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1222291641, now seen corresponding path program 1 times [2022-11-19 08:10:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:49,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547961008] [2022-11-19 08:10:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:49,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:49,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547961008] [2022-11-19 08:10:49,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547961008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:49,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:49,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:10:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090082740] [2022-11-19 08:10:49,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:49,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:10:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:10:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:10:49,825 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-19 08:10:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:49,939 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-19 08:10:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:10:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 19 [2022-11-19 08:10:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:49,942 INFO L225 Difference]: With dead ends: 72 [2022-11-19 08:10:49,942 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:10:49,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:10:49,944 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:49,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:10:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 08:10:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:10:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-19 08:10:49,955 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 19 [2022-11-19 08:10:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:49,955 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-19 08:10:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-11-19 08:10:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-19 08:10:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:10:49,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:49,957 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] [2022-11-19 08:10:49,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:10:49,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1631415448, now seen corresponding path program 1 times [2022-11-19 08:10:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:49,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583358941] [2022-11-19 08:10:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:50,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583358941] [2022-11-19 08:10:50,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583358941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:50,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:50,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:10:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16270250] [2022-11-19 08:10:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:50,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:10:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:10:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:10:50,091 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:10:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:50,181 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-11-19 08:10:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:10:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-19 08:10:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:50,185 INFO L225 Difference]: With dead ends: 102 [2022-11-19 08:10:50,185 INFO L226 Difference]: Without dead ends: 67 [2022-11-19 08:10:50,185 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 [2022-11-19 08:10:50,187 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:50,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-19 08:10:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-11-19 08:10:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 49 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-19 08:10:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-11-19 08:10:50,216 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 24 [2022-11-19 08:10:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:50,216 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-11-19 08:10:50,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:10:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-11-19 08:10:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:10:50,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:50,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:50,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:10:50,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash 718002519, now seen corresponding path program 1 times [2022-11-19 08:10:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:50,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125814230] [2022-11-19 08:10:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:50,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125814230] [2022-11-19 08:10:50,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125814230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:50,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:50,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:10:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967059224] [2022-11-19 08:10:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:50,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:10:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:10:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:10:50,331 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:10:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:50,529 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2022-11-19 08:10:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:10:50,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-19 08:10:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:50,536 INFO L225 Difference]: With dead ends: 189 [2022-11-19 08:10:50,536 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 08:10:50,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:10:50,539 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:50,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 160 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 08:10:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2022-11-19 08:10:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 88 states have internal predecessors, (95), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-11-19 08:10:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2022-11-19 08:10:50,572 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 25 [2022-11-19 08:10:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:50,573 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2022-11-19 08:10:50,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:10:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2022-11-19 08:10:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:10:50,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:50,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:10:50,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 958564498, now seen corresponding path program 1 times [2022-11-19 08:10:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:50,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396241029] [2022-11-19 08:10:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:50,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:50,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396241029] [2022-11-19 08:10:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396241029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:50,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:50,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:10:50,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886942199] [2022-11-19 08:10:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:10:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:10:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:10:50,682 INFO L87 Difference]: Start difference. First operand 118 states and 139 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:10:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:50,793 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2022-11-19 08:10:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:10:50,794 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-19 08:10:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:50,800 INFO L225 Difference]: With dead ends: 124 [2022-11-19 08:10:50,800 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 08:10:50,801 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 [2022-11-19 08:10:50,805 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:50,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 113 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 08:10:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2022-11-19 08:10:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 88 states have internal predecessors, (94), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-11-19 08:10:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2022-11-19 08:10:50,862 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 28 [2022-11-19 08:10:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:50,862 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2022-11-19 08:10:50,863 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:10:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2022-11-19 08:10:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:10:50,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:50,866 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] [2022-11-19 08:10:50,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:10:50,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1695926716, now seen corresponding path program 1 times [2022-11-19 08:10:50,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:50,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077380172] [2022-11-19 08:10:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:50,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:10:51,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077380172] [2022-11-19 08:10:51,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077380172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:51,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:10:51,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:10:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326696709] [2022-11-19 08:10:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:51,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:10:51,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:51,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:10:51,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:10:51,211 INFO L87 Difference]: Start difference. First operand 118 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:10:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:51,379 INFO L93 Difference]: Finished difference Result 288 states and 339 transitions. [2022-11-19 08:10:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:10:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-19 08:10:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:51,386 INFO L225 Difference]: With dead ends: 288 [2022-11-19 08:10:51,386 INFO L226 Difference]: Without dead ends: 172 [2022-11-19 08:10:51,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:51,395 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:51,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 147 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:10:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-19 08:10:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-11-19 08:10:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 115 states have (on average 1.173913043478261) internal successors, (135), 125 states have internal predecessors, (135), 27 states have call successors, (27), 25 states have call predecessors, (27), 25 states have return successors, (31), 27 states have call predecessors, (31), 27 states have call successors, (31) [2022-11-19 08:10:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2022-11-19 08:10:51,434 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 29 [2022-11-19 08:10:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:51,435 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2022-11-19 08:10:51,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:10:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2022-11-19 08:10:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:10:51,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:51,442 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] [2022-11-19 08:10:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:10:51,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash -573471646, now seen corresponding path program 1 times [2022-11-19 08:10:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:51,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903442125] [2022-11-19 08:10:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:10:51,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:51,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903442125] [2022-11-19 08:10:51,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903442125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:51,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273348417] [2022-11-19 08:10:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:51,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:51,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:10:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:10:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:52,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:10:52,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273348417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765696264] [2022-11-19 08:10:52,559 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-19 08:10:52,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:10:52,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:10:52,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:10:52,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:10:55,582 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 114 for LOIs [2022-11-19 08:10:55,598 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 142 for LOIs [2022-11-19 08:10:57,453 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 43 for LOIs [2022-11-19 08:10:57,460 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 112 for LOIs [2022-11-19 08:10:57,472 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:11:09,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2701#(and (<= |timeShift_isHighWaterLevel_~retValue_acc~8#1| 1) (<= 1 |timeShift_processEnvironment_~tmp~4#1|) (<= |timeShift_processEnvironment_~tmp~4#1| 1) (<= |timeShift_isHighWaterLevel_#res#1| 1) (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp~7#1| 0)) (= |timeShift_isMethaneAlarm_~retValue_acc~6#1| |timeShift_isMethaneAlarm_#res#1|) (= ~head~0.offset 0) (<= |timeShift_isHighWaterSensorDry_~retValue_acc~5#1| 0) (<= 2 ~waterLevel~0) (<= 1 |timeShift_isHighWaterLevel_~tmp___0~1#1|) (<= 0 |timeShift_isHighWaterSensorDry_#res#1|) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (<= |timeShift_isHighWaterLevel_~tmp~6#1| 0) (<= 0 |timeShift_isHighWaterLevel_~tmp~6#1|) (<= 2 |old(~waterLevel~0)|) (= |timeShift_activatePump_~tmp~5#1| |timeShift_isMethaneAlarm_#res#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= 1 |timeShift_isHighWaterLevel_~retValue_acc~8#1|) (<= 0 ~head~0.base) (<= |timeShift___utac_acc__Specification1_spec__1_~tmp~7#1| 1) (<= 0 |timeShift_isHighWaterSensorDry_~retValue_acc~5#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~7#1|) (<= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification1_spec__1_~tmp___0~2#1|) (<= |timeShift_isHighWaterSensorDry_#res#1| 0) (<= |timeShift_isHighWaterLevel_~tmp___0~1#1| 1) (<= 1 |timeShift_isHighWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification1_spec__1_~tmp~7#1| ~methaneLevelCritical~0) (<= 0 |#StackHeapBarrier|) (= |timeShift_activatePump_~tmp~5#1| 0) (= ~pumpRunning~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 08:11:09,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:11:09,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:11:09,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-11-19 08:11:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481526099] [2022-11-19 08:11:09,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:09,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:11:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:11:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:11:09,205 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 6 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:11:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:11,879 INFO L93 Difference]: Finished difference Result 577 states and 761 transitions. [2022-11-19 08:11:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 08:11:11,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 6 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 32 [2022-11-19 08:11:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:11,891 INFO L225 Difference]: With dead ends: 577 [2022-11-19 08:11:11,892 INFO L226 Difference]: Without dead ends: 414 [2022-11-19 08:11:11,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=803, Invalid=6003, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 08:11:11,898 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 439 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:11,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 449 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:11:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-19 08:11:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 302. [2022-11-19 08:11:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 224 states have internal predecessors, (239), 49 states have call successors, (49), 44 states have call predecessors, (49), 46 states have return successors, (60), 49 states have call predecessors, (60), 49 states have call successors, (60) [2022-11-19 08:11:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 348 transitions. [2022-11-19 08:11:11,988 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 348 transitions. Word has length 32 [2022-11-19 08:11:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:11,989 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 348 transitions. [2022-11-19 08:11:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 6 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:11:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 348 transitions. [2022-11-19 08:11:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:11:11,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:11,994 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:12,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:12,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:11:12,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1568595165, now seen corresponding path program 1 times [2022-11-19 08:11:12,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575728030] [2022-11-19 08:11:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:11:12,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:11:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:11:12,273 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:11:12,274 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:11:12,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:11:12,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:11:12,281 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:12,285 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:11:12,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:11:12 BoogieIcfgContainer [2022-11-19 08:11:12,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:11:12,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:11:12,357 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:11:12,357 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:11:12,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:10:48" (3/4) ... [2022-11-19 08:11:12,359 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:11:12,451 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:11:12,451 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:11:12,452 INFO L158 Benchmark]: Toolchain (without parser) took 25014.67ms. Allocated memory was 138.4MB in the beginning and 339.7MB in the end (delta: 201.3MB). Free memory was 96.6MB in the beginning and 141.2MB in the end (delta: -44.6MB). Peak memory consumption was 155.0MB. Max. memory is 16.1GB. [2022-11-19 08:11:12,452 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 138.4MB. Free memory was 113.8MB in the beginning and 113.8MB in the end (delta: 17.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:11:12,453 INFO L158 Benchmark]: CACSL2BoogieTranslator took 487.73ms. Allocated memory is still 138.4MB. Free memory was 96.4MB in the beginning and 105.5MB in the end (delta: -9.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 08:11:12,453 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.51ms. Allocated memory is still 138.4MB. Free memory was 105.1MB in the beginning and 103.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:11:12,453 INFO L158 Benchmark]: Boogie Preprocessor took 29.18ms. Allocated memory is still 138.4MB. Free memory was 103.0MB in the beginning and 101.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:11:12,454 INFO L158 Benchmark]: RCFGBuilder took 654.05ms. Allocated memory is still 138.4MB. Free memory was 101.6MB in the beginning and 78.3MB in the end (delta: 23.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-19 08:11:12,454 INFO L158 Benchmark]: TraceAbstraction took 23694.43ms. Allocated memory was 138.4MB in the beginning and 339.7MB in the end (delta: 201.3MB). Free memory was 77.4MB in the beginning and 146.5MB in the end (delta: -69.1MB). Peak memory consumption was 134.1MB. Max. memory is 16.1GB. [2022-11-19 08:11:12,455 INFO L158 Benchmark]: Witness Printer took 94.71ms. Allocated memory is still 339.7MB. Free memory was 146.5MB in the beginning and 141.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:11:12,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 138.4MB. Free memory was 113.8MB in the beginning and 113.8MB in the end (delta: 17.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 487.73ms. Allocated memory is still 138.4MB. Free memory was 96.4MB in the beginning and 105.5MB in the end (delta: -9.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.51ms. Allocated memory is still 138.4MB. Free memory was 105.1MB in the beginning and 103.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.18ms. Allocated memory is still 138.4MB. Free memory was 103.0MB in the beginning and 101.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 654.05ms. Allocated memory is still 138.4MB. Free memory was 101.6MB in the beginning and 78.3MB in the end (delta: 23.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 23694.43ms. Allocated memory was 138.4MB in the beginning and 339.7MB in the end (delta: 201.3MB). Free memory was 77.4MB in the beginning and 146.5MB in the end (delta: -69.1MB). Peak memory consumption was 134.1MB. Max. memory is 16.1GB. * Witness Printer took 94.71ms. Allocated memory is still 339.7MB. Free memory was 146.5MB in the beginning and 141.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 774]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L219] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L424] int methaneLevelCritical = 0; [L591] int pumpRunning = 0; [L423] int waterLevel = 1; [L592] int systemActive = 1; [L843] int cleanupTimeShifts = 4; [L916] int retValue_acc ; [L917] int tmp ; [L921] FCALL select_helpers() [L922] FCALL select_features() [L923] CALL, EXPR valid_product() [L834] int retValue_acc ; [L837] retValue_acc = 1 [L838] return (retValue_acc); [L923] RET, EXPR valid_product() [L923] tmp = valid_product() [L925] COND TRUE \read(tmp) [L927] FCALL setup() [L928] CALL runTest() [L910] CALL test() [L521] int splverifierCounter ; [L522] int tmp ; [L523] int tmp___0 ; [L524] int tmp___1 ; [L525] int tmp___2 ; [L528] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L530] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L532] COND TRUE splverifierCounter < 4 [L538] tmp = __VERIFIER_nondet_int() [L540] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L542] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L441] COND TRUE waterLevel < 2 [L442] waterLevel = waterLevel + 1 [L542] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L548] tmp___0 = __VERIFIER_nondet_int() [L550] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L558] tmp___2 = __VERIFIER_nondet_int() [L560] COND TRUE \read(tmp___2) [L562] CALL startSystem() [L765] systemActive = 1 [L562] RET startSystem() [L575] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L599] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L606] COND TRUE \read(systemActive) [L608] CALL processEnvironment() [L628] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L631] COND TRUE ! pumpRunning [L633] CALL, EXPR isHighWaterLevel() [L743] int retValue_acc ; [L744] int tmp ; [L745] int tmp___0 ; [L749] CALL, EXPR isHighWaterSensorDry() [L503] int retValue_acc ; [L506] COND FALSE !(waterLevel < 2) [L510] retValue_acc = 0 [L511] return (retValue_acc); [L749] RET, EXPR isHighWaterSensorDry() [L749] tmp = isHighWaterSensorDry() [L751] COND FALSE !(\read(tmp)) [L754] tmp___0 = 1 [L756] retValue_acc = tmp___0 [L757] return (retValue_acc); [L633] RET, EXPR isHighWaterLevel() [L633] tmp = isHighWaterLevel() [L635] COND TRUE \read(tmp) [L637] CALL activatePump() [L662] int tmp ; [L666] CALL, EXPR isMethaneAlarm() [L687] int retValue_acc ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L691] CALL, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L462] int retValue_acc ; [L465] retValue_acc = methaneLevelCritical [L466] return (retValue_acc); [L691] RET, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L691] retValue_acc = isMethaneLevelCritical() [L693] return (retValue_acc); [L666] RET, EXPR isMethaneAlarm() [L666] tmp = isMethaneAlarm() [L668] COND FALSE !(\read(tmp)) [L672] CALL activatePump__wrappee__highWaterSensor() [L656] pumpRunning = 1 [L672] RET activatePump__wrappee__highWaterSensor() [L637] RET activatePump() [L608] RET processEnvironment() [L614] CALL __utac_acc__Specification1_spec__1() [L780] int tmp ; [L781] int tmp___0 ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L785] CALL, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L462] int retValue_acc ; [L465] retValue_acc = methaneLevelCritical [L466] return (retValue_acc); [L785] RET, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=0, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L785] tmp = isMethaneLevelCritical() [L787] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=2] [L614] RET __utac_acc__Specification1_spec__1() [L575] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=16, tmp___2=-1, waterLevel=2] [L530] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=16, tmp___2=-1, waterLevel=2] [L532] COND TRUE splverifierCounter < 4 [L538] tmp = __VERIFIER_nondet_int() [L540] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=16, tmp___2=-1, waterLevel=2] [L548] tmp___0 = __VERIFIER_nondet_int() [L550] COND TRUE \read(tmp___0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=1, tmp___1=16, tmp___2=-1, waterLevel=2] [L552] CALL changeMethaneLevel() VAL [\old(methaneLevelCritical)=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L453] COND FALSE !(\read(methaneLevelCritical)) [L456] methaneLevelCritical = 1 [L552] RET changeMethaneLevel() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=1, tmp___1=16, tmp___2=-1, waterLevel=2] [L558] tmp___2 = __VERIFIER_nondet_int() [L560] COND TRUE \read(tmp___2) [L562] CALL startSystem() [L765] systemActive = 1 [L562] RET startSystem() [L575] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L599] COND TRUE \read(pumpRunning) [L601] CALL lowerWaterLevel() [L429] COND TRUE waterLevel > 0 [L430] waterLevel = waterLevel - 1 [L601] RET lowerWaterLevel() [L606] COND TRUE \read(systemActive) [L608] CALL processEnvironment() [L628] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L631] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L646] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L608] RET processEnvironment() [L614] CALL __utac_acc__Specification1_spec__1() [L780] int tmp ; [L781] int tmp___0 ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L785] CALL, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L462] int retValue_acc ; [L465] retValue_acc = methaneLevelCritical [L466] return (retValue_acc); [L785] RET, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=1, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L785] tmp = isMethaneLevelCritical() [L787] COND TRUE \read(tmp) [L789] CALL, EXPR isPumpRunning() [L698] int retValue_acc ; [L701] retValue_acc = pumpRunning [L702] return (retValue_acc); [L789] RET, EXPR isPumpRunning() [L789] tmp___0 = isPumpRunning() [L791] COND TRUE \read(tmp___0) [L793] CALL __automaton_fail() [L774] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.5s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 617 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 600 mSDsluCounter, 1081 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 746 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1950 IncrementalHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 335 mSDtfsCounter, 1950 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=302occurred in iteration=8, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 130 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 276 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 777 SizeOfPredicates, 11 NumberOfNonLiveVariables, 203 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 4/8 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 RESULT: Ultimate proved your program to be incorrect! [2022-11-19 08:11:12,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11ee950-7eaf-4ceb-a020-651bd4d5a718/bin/utaipan-I9t0OCRTmS/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE