./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI --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 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- 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-5e519f3 [2022-11-03 03:43:44,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:44,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:44,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:44,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:44,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:44,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:44,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:44,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:44,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:44,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:44,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:44,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:44,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:44,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:44,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:44,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:44,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:45,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:45,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:45,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:45,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:45,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:45,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:45,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:45,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:45,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:45,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:45,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:45,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:45,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:45,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:45,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:45,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:45,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:45,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:45,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:45,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:45,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:45,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:45,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:45,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:43:45,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:45,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:45,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:45,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:45,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:45,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:45,084 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:45,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:45,085 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:45,085 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:43:45,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:45,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:45,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:43:45,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:43:45,086 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:45,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:43:45,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:43:45,087 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:43:45,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:45,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:43:45,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:43:45,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:43:45,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:45,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:45,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:45,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:45,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:43:45,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:45,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:45,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:45,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:45,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:45,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:45,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:45,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:43:45,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:45,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:45,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:43:45,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:43:45,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:45,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:45,092 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_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2022-11-03 03:43:45,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:45,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:45,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:45,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:45,403 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:45,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2022-11-03 03:43:45,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/3311560f7/3853d333944a46e8a77e8163c98f9a83/FLAG0195cff03 [2022-11-03 03:43:46,088 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:46,089 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2022-11-03 03:43:46,117 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/3311560f7/3853d333944a46e8a77e8163c98f9a83/FLAG0195cff03 [2022-11-03 03:43:46,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/3311560f7/3853d333944a46e8a77e8163c98f9a83 [2022-11-03 03:43:46,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:46,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:46,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:46,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:46,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:46,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:46" (1/1) ... [2022-11-03 03:43:46,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc666a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:46, skipping insertion in model container [2022-11-03 03:43:46,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:46" (1/1) ... [2022-11-03 03:43:46,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:46,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:46,959 WARN L230 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_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2022-11-03 03:43:46,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:46,981 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:47,125 WARN L230 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_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2022-11-03 03:43:47,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:47,151 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:47,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47 WrapperNode [2022-11-03 03:43:47,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:47,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:47,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:47,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:47,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,275 INFO L138 Inliner]: procedures = 94, calls = 342, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 898 [2022-11-03 03:43:47,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:47,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:47,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:47,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:47,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:47,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:47,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:47,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:47,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (1/1) ... [2022-11-03 03:43:47,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:47,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:47,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:47,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:43:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:43:47,485 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:43:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:43:47,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:43:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:43:47,486 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:43:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:43:47,486 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:43:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:43:47,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:43:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:43:47,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:43:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 03:43:47,487 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 03:43:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:43:47,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:43:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:43:47,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:43:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:43:47,489 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:43:47,489 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:43:47,489 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:43:47,489 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:43:47,489 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:43:47,490 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:43:47,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:43:47,490 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:43:47,490 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:43:47,490 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:43:47,491 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:43:47,491 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:43:47,491 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:43:47,491 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:43:47,491 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:43:47,491 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:43:47,492 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:43:47,492 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:43:47,492 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:43:47,492 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:43:47,492 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:43:47,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:43:47,493 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:43:47,493 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:43:47,493 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:43:47,494 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:43:47,494 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:43:47,494 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:43:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:43:47,495 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:43:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:47,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:43:47,496 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:43:47,746 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:47,748 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:48,939 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:49,753 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:49,754 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:43:49,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:49 BoogieIcfgContainer [2022-11-03 03:43:49,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:49,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:49,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:49,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:49,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:46" (1/3) ... [2022-11-03 03:43:49,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18de9da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:49, skipping insertion in model container [2022-11-03 03:43:49,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:47" (2/3) ... [2022-11-03 03:43:49,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18de9da7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:49, skipping insertion in model container [2022-11-03 03:43:49,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:49" (3/3) ... [2022-11-03 03:43:49,773 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2022-11-03 03:43:49,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:49,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:49,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:49,895 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;@554fa85d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:49,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 376 states, 250 states have (on average 1.552) internal successors, (388), 266 states have internal predecessors, (388), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-03 03:43:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:43:49,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:49,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:49,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:49,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1956872798, now seen corresponding path program 1 times [2022-11-03 03:43:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:49,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665442100] [2022-11-03 03:43:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:49,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:43:50,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665442100] [2022-11-03 03:43:50,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665442100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:50,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:50,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:43:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224988263] [2022-11-03 03:43:50,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:50,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:43:50,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:43:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:43:50,943 INFO L87 Difference]: Start difference. First operand has 376 states, 250 states have (on average 1.552) internal successors, (388), 266 states have internal predecessors, (388), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:43:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:51,876 INFO L93 Difference]: Finished difference Result 1106 states and 1750 transitions. [2022-11-03 03:43:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:43:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-03 03:43:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:51,911 INFO L225 Difference]: With dead ends: 1106 [2022-11-03 03:43:51,911 INFO L226 Difference]: Without dead ends: 731 [2022-11-03 03:43:51,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:43:51,922 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 561 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:51,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 2428 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:43:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-03 03:43:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 725. [2022-11-03 03:43:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 485 states have (on average 1.5422680412371135) internal successors, (748), 514 states have internal predecessors, (748), 192 states have call successors, (192), 49 states have call predecessors, (192), 47 states have return successors, (198), 186 states have call predecessors, (198), 190 states have call successors, (198) [2022-11-03 03:43:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1138 transitions. [2022-11-03 03:43:52,034 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1138 transitions. Word has length 73 [2022-11-03 03:43:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:52,035 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1138 transitions. [2022-11-03 03:43:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:43:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1138 transitions. [2022-11-03 03:43:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:43:52,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:52,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:52,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash 198398302, now seen corresponding path program 1 times [2022-11-03 03:43:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:52,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879090070] [2022-11-03 03:43:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:52,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:43:52,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:52,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879090070] [2022-11-03 03:43:52,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879090070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:52,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:52,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:43:52,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054647482] [2022-11-03 03:43:52,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:52,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:43:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:43:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:43:52,632 INFO L87 Difference]: Start difference. First operand 725 states and 1138 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:43:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:53,481 INFO L93 Difference]: Finished difference Result 834 states and 1301 transitions. [2022-11-03 03:43:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:43:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-03 03:43:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:53,493 INFO L225 Difference]: With dead ends: 834 [2022-11-03 03:43:53,494 INFO L226 Difference]: Without dead ends: 832 [2022-11-03 03:43:53,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:43:53,501 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 684 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:53,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 1740 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:43:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-03 03:43:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 822. [2022-11-03 03:43:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 544 states have (on average 1.5091911764705883) internal successors, (821), 573 states have internal predecessors, (821), 217 states have call successors, (217), 63 states have call predecessors, (217), 60 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:43:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1267 transitions. [2022-11-03 03:43:53,577 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1267 transitions. Word has length 77 [2022-11-03 03:43:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:53,578 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1267 transitions. [2022-11-03 03:43:53,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:43:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1267 transitions. [2022-11-03 03:43:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:43:53,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:53,587 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:53,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:43:53,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash 732809131, now seen corresponding path program 1 times [2022-11-03 03:43:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:53,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150678326] [2022-11-03 03:43:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:53,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 03:43:53,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150678326] [2022-11-03 03:43:53,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150678326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:53,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:53,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286200174] [2022-11-03 03:43:53,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:53,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:53,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:53,840 INFO L87 Difference]: Start difference. First operand 822 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:43:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:54,067 INFO L93 Difference]: Finished difference Result 1670 states and 2603 transitions. [2022-11-03 03:43:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-03 03:43:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:54,073 INFO L225 Difference]: With dead ends: 1670 [2022-11-03 03:43:54,073 INFO L226 Difference]: Without dead ends: 860 [2022-11-03 03:43:54,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:43:54,081 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 54 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:54,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1621 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-03 03:43:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 826. [2022-11-03 03:43:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 548 states have (on average 1.5054744525547445) internal successors, (825), 577 states have internal predecessors, (825), 217 states have call successors, (217), 63 states have call predecessors, (217), 60 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:43:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1271 transitions. [2022-11-03 03:43:54,137 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1271 transitions. Word has length 108 [2022-11-03 03:43:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:54,138 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1271 transitions. [2022-11-03 03:43:54,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:43:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1271 transitions. [2022-11-03 03:43:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 03:43:54,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:54,143 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:54,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:43:54,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2139720671, now seen corresponding path program 1 times [2022-11-03 03:43:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403867852] [2022-11-03 03:43:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:43:54,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:54,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403867852] [2022-11-03 03:43:54,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403867852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:54,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306841064] [2022-11-03 03:43:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:54,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:54,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:54,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:54,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:43:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:43:54,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:43:54,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:54,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306841064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:54,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:43:54,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 03:43:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844452240] [2022-11-03 03:43:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:43:54,853 INFO L87 Difference]: Start difference. First operand 826 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:55,192 INFO L93 Difference]: Finished difference Result 1718 states and 2692 transitions. [2022-11-03 03:43:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:55,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 115 [2022-11-03 03:43:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:55,199 INFO L225 Difference]: With dead ends: 1718 [2022-11-03 03:43:55,199 INFO L226 Difference]: Without dead ends: 904 [2022-11-03 03:43:55,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:43:55,206 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 213 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:55,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1395 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:43:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-11-03 03:43:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2022-11-03 03:43:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 624 states have (on average 1.5560897435897436) internal successors, (971), 653 states have internal predecessors, (971), 217 states have call successors, (217), 65 states have call predecessors, (217), 62 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:43:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1417 transitions. [2022-11-03 03:43:55,262 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1417 transitions. Word has length 115 [2022-11-03 03:43:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:55,262 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1417 transitions. [2022-11-03 03:43:55,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1417 transitions. [2022-11-03 03:43:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 03:43:55,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:55,267 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:55,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:55,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:55,477 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2119016035, now seen corresponding path program 1 times [2022-11-03 03:43:55,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375338875] [2022-11-03 03:43:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:43:55,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375338875] [2022-11-03 03:43:55,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375338875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414326016] [2022-11-03 03:43:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:55,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:55,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:55,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:55,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:43:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:43:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:43:56,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414326016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:56,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:43:56,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:43:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564418046] [2022-11-03 03:43:56,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:56,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:43:56,045 INFO L87 Difference]: Start difference. First operand 904 states and 1417 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:56,423 INFO L93 Difference]: Finished difference Result 1874 states and 2982 transitions. [2022-11-03 03:43:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-03 03:43:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:56,434 INFO L225 Difference]: With dead ends: 1874 [2022-11-03 03:43:56,435 INFO L226 Difference]: Without dead ends: 982 [2022-11-03 03:43:56,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:43:56,448 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 211 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:56,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1395 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:43:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-03 03:43:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2022-11-03 03:43:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 700 states have (on average 1.5957142857142856) internal successors, (1117), 729 states have internal predecessors, (1117), 217 states have call successors, (217), 67 states have call predecessors, (217), 64 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:43:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1563 transitions. [2022-11-03 03:43:56,505 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1563 transitions. Word has length 120 [2022-11-03 03:43:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:56,505 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1563 transitions. [2022-11-03 03:43:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1563 transitions. [2022-11-03 03:43:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:43:56,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:56,510 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:56,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:56,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1007849549, now seen corresponding path program 1 times [2022-11-03 03:43:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:56,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948030019] [2022-11-03 03:43:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 03:43:56,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948030019] [2022-11-03 03:43:56,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948030019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002079611] [2022-11-03 03:43:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:56,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:56,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:56,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:56,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:43:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:43:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:43:57,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:57,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002079611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:57,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:43:57,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:43:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842329848] [2022-11-03 03:43:57,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:57,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:43:57,273 INFO L87 Difference]: Start difference. First operand 982 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:57,586 INFO L93 Difference]: Finished difference Result 2030 states and 3272 transitions. [2022-11-03 03:43:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 124 [2022-11-03 03:43:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:57,593 INFO L225 Difference]: With dead ends: 2030 [2022-11-03 03:43:57,593 INFO L226 Difference]: Without dead ends: 1060 [2022-11-03 03:43:57,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:43:57,600 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 209 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:57,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1395 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:43:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-03 03:43:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2022-11-03 03:43:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 776 states have (on average 1.6275773195876289) internal successors, (1263), 805 states have internal predecessors, (1263), 217 states have call successors, (217), 69 states have call predecessors, (217), 66 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:43:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1709 transitions. [2022-11-03 03:43:57,651 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1709 transitions. Word has length 124 [2022-11-03 03:43:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:57,653 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1709 transitions. [2022-11-03 03:43:57,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1709 transitions. [2022-11-03 03:43:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:43:57,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:57,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:57,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:57,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1997009281, now seen corresponding path program 1 times [2022-11-03 03:43:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:57,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265716674] [2022-11-03 03:43:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 03:43:58,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:58,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265716674] [2022-11-03 03:43:58,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265716674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:43:58,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207689642] [2022-11-03 03:43:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:58,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:58,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:58,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:43:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:43:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 03:43:58,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207689642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:58,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:43:58,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:43:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731011882] [2022-11-03 03:43:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:43:58,370 INFO L87 Difference]: Start difference. First operand 1060 states and 1709 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:58,712 INFO L93 Difference]: Finished difference Result 2186 states and 3562 transitions. [2022-11-03 03:43:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 127 [2022-11-03 03:43:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:58,722 INFO L225 Difference]: With dead ends: 2186 [2022-11-03 03:43:58,722 INFO L226 Difference]: Without dead ends: 1138 [2022-11-03 03:43:58,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:43:58,730 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 207 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:58,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1395 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:43:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-11-03 03:43:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2022-11-03 03:43:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 852 states have (on average 1.653755868544601) internal successors, (1409), 881 states have internal predecessors, (1409), 217 states have call successors, (217), 71 states have call predecessors, (217), 68 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:43:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1855 transitions. [2022-11-03 03:43:58,788 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1855 transitions. Word has length 127 [2022-11-03 03:43:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:58,790 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1855 transitions. [2022-11-03 03:43:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1855 transitions. [2022-11-03 03:43:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:43:58,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:58,796 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-03 03:43:58,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:59,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:59,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1750071185, now seen corresponding path program 1 times [2022-11-03 03:43:59,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:59,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946870240] [2022-11-03 03:43:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 03:44:02,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:02,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946870240] [2022-11-03 03:44:02,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946870240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:44:02,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93812276] [2022-11-03 03:44:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:02,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:02,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:02,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:44:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:44:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:44:02,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:02,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93812276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:02,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:44:02,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [35] total 37 [2022-11-03 03:44:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338327182] [2022-11-03 03:44:02,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:02,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:02,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:02,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:02,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:44:02,977 INFO L87 Difference]: Start difference. First operand 1138 states and 1855 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:44:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:03,352 INFO L93 Difference]: Finished difference Result 2342 states and 3852 transitions. [2022-11-03 03:44:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:44:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 129 [2022-11-03 03:44:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:03,360 INFO L225 Difference]: With dead ends: 2342 [2022-11-03 03:44:03,360 INFO L226 Difference]: Without dead ends: 1216 [2022-11-03 03:44:03,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:44:03,367 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 205 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:03,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1395 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:44:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-11-03 03:44:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2022-11-03 03:44:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 928 states have (on average 1.675646551724138) internal successors, (1555), 957 states have internal predecessors, (1555), 217 states have call successors, (217), 73 states have call predecessors, (217), 70 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2022-11-03 03:44:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2001 transitions. [2022-11-03 03:44:03,445 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2001 transitions. Word has length 129 [2022-11-03 03:44:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:03,446 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 2001 transitions. [2022-11-03 03:44:03,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:44:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2001 transitions. [2022-11-03 03:44:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:44:03,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:03,452 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:03,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:03,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:44:03,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash 227414720, now seen corresponding path program 1 times [2022-11-03 03:44:03,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:03,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281299594] [2022-11-03 03:44:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:03,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 03:44:03,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281299594] [2022-11-03 03:44:03,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281299594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:03,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:03,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:44:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157297017] [2022-11-03 03:44:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:44:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:44:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:44:03,926 INFO L87 Difference]: Start difference. First operand 1216 states and 2001 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:44:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:04,608 INFO L93 Difference]: Finished difference Result 2504 states and 4108 transitions. [2022-11-03 03:44:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:44:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2022-11-03 03:44:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:04,615 INFO L225 Difference]: With dead ends: 2504 [2022-11-03 03:44:04,616 INFO L226 Difference]: Without dead ends: 1113 [2022-11-03 03:44:04,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:44:04,623 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 700 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2771 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:04,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 2771 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:44:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-11-03 03:44:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2022-11-03 03:44:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 782 states have (on average 1.5549872122762147) internal successors, (1216), 813 states have internal predecessors, (1216), 229 states have call successors, (229), 82 states have call predecessors, (229), 78 states have return successors, (249), 218 states have call predecessors, (249), 226 states have call successors, (249) [2022-11-03 03:44:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1694 transitions. [2022-11-03 03:44:04,685 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1694 transitions. Word has length 129 [2022-11-03 03:44:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:04,685 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1694 transitions. [2022-11-03 03:44:04,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:44:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1694 transitions. [2022-11-03 03:44:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 03:44:04,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:04,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:04,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:44:04,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 20768733, now seen corresponding path program 1 times [2022-11-03 03:44:04,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:04,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750321745] [2022-11-03 03:44:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 03:44:07,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750321745] [2022-11-03 03:44:07,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750321745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:44:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879267441] [2022-11-03 03:44:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:07,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:07,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:07,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:07,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:44:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:44:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 03:44:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:00,539 WARN L234 SmtUtils]: Spent 47.73s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:45:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-03 03:45:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879267441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1121152026] [2022-11-03 03:45:03,453 INFO L159 IcfgInterpreter]: Started Sifa with 88 locations of interest [2022-11-03 03:45:03,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:45:03,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:45:03,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:45:03,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:45:06,195 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-03 03:45:09,814 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-03 03:45:10,379 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-11-03 03:46:14,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:14,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:46:14,278 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:46:14,282 INFO L158 Benchmark]: Toolchain (without parser) took 147989.38ms. Allocated memory was 96.5MB in the beginning and 734.0MB in the end (delta: 637.5MB). Free memory was 60.0MB in the beginning and 636.5MB in the end (delta: -576.5MB). Peak memory consumption was 456.7MB. Max. memory is 16.1GB. [2022-11-03 03:46:14,282 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory was 67.1MB in the beginning and 67.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:46:14,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 851.88ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 59.8MB in the beginning and 82.5MB in the end (delta: -22.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 03:46:14,283 INFO L158 Benchmark]: Boogie Procedure Inliner took 124.00ms. Allocated memory is still 134.2MB. Free memory was 82.5MB in the beginning and 77.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:46:14,283 INFO L158 Benchmark]: Boogie Preprocessor took 111.64ms. Allocated memory is still 134.2MB. Free memory was 77.6MB in the beginning and 72.1MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:46:14,284 INFO L158 Benchmark]: RCFGBuilder took 2371.22ms. Allocated memory was 134.2MB in the beginning and 163.6MB in the end (delta: 29.4MB). Free memory was 72.1MB in the beginning and 102.0MB in the end (delta: -29.9MB). Peak memory consumption was 52.6MB. Max. memory is 16.1GB. [2022-11-03 03:46:14,284 INFO L158 Benchmark]: TraceAbstraction took 144518.29ms. Allocated memory was 163.6MB in the beginning and 734.0MB in the end (delta: 570.4MB). Free memory was 102.0MB in the beginning and 636.5MB in the end (delta: -534.5MB). Peak memory consumption was 433.5MB. Max. memory is 16.1GB. [2022-11-03 03:46:14,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory was 67.1MB in the beginning and 67.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 851.88ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 59.8MB in the beginning and 82.5MB in the end (delta: -22.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 124.00ms. Allocated memory is still 134.2MB. Free memory was 82.5MB in the beginning and 77.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 111.64ms. Allocated memory is still 134.2MB. Free memory was 77.6MB in the beginning and 72.1MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2371.22ms. Allocated memory was 134.2MB in the beginning and 163.6MB in the end (delta: 29.4MB). Free memory was 72.1MB in the beginning and 102.0MB in the end (delta: -29.9MB). Peak memory consumption was 52.6MB. Max. memory is 16.1GB. * TraceAbstraction took 144518.29ms. Allocated memory was 163.6MB in the beginning and 734.0MB in the end (delta: 570.4MB). Free memory was 102.0MB in the beginning and 636.5MB in the end (delta: -534.5MB). Peak memory consumption was 433.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:46:14,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI --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 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- 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-5e519f3 [2022-11-03 03:46:16,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:46:16,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:46:16,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:46:16,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:46:16,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:46:16,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:46:16,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:46:16,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:46:16,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:46:16,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:46:16,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:46:16,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:46:16,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:46:16,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:46:16,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:46:16,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:46:16,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:46:16,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:46:16,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:46:16,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:46:16,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:46:16,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:46:16,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:46:16,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:46:16,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:46:16,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:46:16,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:46:16,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:46:16,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:46:16,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:46:16,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:46:16,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:46:16,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:46:16,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:46:16,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:46:16,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:46:16,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:46:16,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:46:16,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:46:16,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:46:16,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:46:16,730 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:46:16,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:46:16,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:46:16,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:46:16,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:46:16,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:46:16,733 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:46:16,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:46:16,734 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:46:16,734 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:46:16,735 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:46:16,735 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:46:16,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:46:16,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:46:16,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:46:16,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:46:16,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:46:16,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:46:16,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:46:16,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:46:16,738 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:46:16,739 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:46:16,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:46:16,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:46:16,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:46:16,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:46:16,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:46:16,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:46:16,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:46:16,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:46:16,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:46:16,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:46:16,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:46:16,742 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:46:16,742 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:46:16,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:46:16,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:46:16,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:46:16,743 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2022-11-03 03:46:17,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:46:17,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:46:17,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:46:17,134 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:46:17,135 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:46:17,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2022-11-03 03:46:17,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/a6943e0c2/a9bfb72a639e49a29e6b0887277ff4e4/FLAG0f44402b6 [2022-11-03 03:46:17,856 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:46:17,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2022-11-03 03:46:17,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/a6943e0c2/a9bfb72a639e49a29e6b0887277ff4e4/FLAG0f44402b6 [2022-11-03 03:46:18,063 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/data/a6943e0c2/a9bfb72a639e49a29e6b0887277ff4e4 [2022-11-03 03:46:18,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:46:18,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:46:18,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:46:18,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:46:18,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:46:18,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:18" (1/1) ... [2022-11-03 03:46:18,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1004d6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:18, skipping insertion in model container [2022-11-03 03:46:18,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:18" (1/1) ... [2022-11-03 03:46:18,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:46:18,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:46:18,710 WARN L230 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_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2022-11-03 03:46:18,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:18,729 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:46:18,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:46:18,889 WARN L230 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_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2022-11-03 03:46:18,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:18,894 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:46:18,995 WARN L230 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_d0486de6-a94a-4d69-841f-6c25919bc359/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2022-11-03 03:46:18,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:19,021 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:46:19,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19 WrapperNode [2022-11-03 03:46:19,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:46:19,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:46:19,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:46:19,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:46:19,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,099 INFO L138 Inliner]: procedures = 96, calls = 342, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 843 [2022-11-03 03:46:19,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:46:19,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:46:19,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:46:19,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:46:19,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,168 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:46:19,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:46:19,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:46:19,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:46:19,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (1/1) ... [2022-11-03 03:46:19,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:46:19,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:19,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:46:19,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:46:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:46:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:46:19,269 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:46:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:46:19,269 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:46:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:46:19,270 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:46:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:46:19,270 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:46:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:46:19,270 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:46:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:46:19,271 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:46:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 03:46:19,271 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 03:46:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:46:19,271 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:46:19,271 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:46:19,272 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:46:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:46:19,272 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:46:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:46:19,272 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:46:19,272 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:46:19,273 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:46:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:46:19,273 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:46:19,273 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:46:19,274 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:46:19,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:46:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:46:19,275 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:46:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:46:19,275 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:46:19,275 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:46:19,275 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:46:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:46:19,276 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:46:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:46:19,276 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:46:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:46:19,276 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:46:19,276 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:46:19,277 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:46:19,277 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:46:19,278 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:46:19,279 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:46:19,279 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:46:19,280 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:46:19,280 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:46:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:46:19,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:46:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:46:19,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:46:19,521 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:46:19,523 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:46:21,120 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:46:21,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:46:21,140 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:46:21,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:21 BoogieIcfgContainer [2022-11-03 03:46:21,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:46:21,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:46:21,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:46:21,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:46:21,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:46:18" (1/3) ... [2022-11-03 03:46:21,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf4551e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:21, skipping insertion in model container [2022-11-03 03:46:21,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:19" (2/3) ... [2022-11-03 03:46:21,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf4551e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:21, skipping insertion in model container [2022-11-03 03:46:21,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:21" (3/3) ... [2022-11-03 03:46:21,154 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2022-11-03 03:46:21,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:46:21,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:46:21,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:46:21,282 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;@347a6c9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:46:21,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:46:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 568 states, 442 states have (on average 1.667420814479638) internal successors, (737), 458 states have internal predecessors, (737), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-03 03:46:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 03:46:21,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:21,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:21,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:21,342 INFO L85 PathProgramCache]: Analyzing trace with hash -575617612, now seen corresponding path program 1 times [2022-11-03 03:46:21,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:21,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984381471] [2022-11-03 03:46:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:21,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:21,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:21,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:46:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:21,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:21,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:21,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:21,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984381471] [2022-11-03 03:46:21,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984381471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:21,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:21,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:21,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420488438] [2022-11-03 03:46:21,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:21,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:21,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:21,945 INFO L87 Difference]: Start difference. First operand has 568 states, 442 states have (on average 1.667420814479638) internal successors, (737), 458 states have internal predecessors, (737), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:22,181 INFO L93 Difference]: Finished difference Result 1129 states and 1870 transitions. [2022-11-03 03:46:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:46:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 103 [2022-11-03 03:46:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:22,200 INFO L225 Difference]: With dead ends: 1129 [2022-11-03 03:46:22,200 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:46:22,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:22,216 INFO L413 NwaCegarLoop]: 917 mSDtfsCounter, 15 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:22,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2744 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:46:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-11-03 03:46:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6575342465753424) internal successors, (726), 453 states have internal predecessors, (726), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 923 transitions. [2022-11-03 03:46:22,303 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 923 transitions. Word has length 103 [2022-11-03 03:46:22,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:22,304 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 923 transitions. [2022-11-03 03:46:22,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 923 transitions. [2022-11-03 03:46:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 03:46:22,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:22,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:22,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:22,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:22,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash 807558964, now seen corresponding path program 1 times [2022-11-03 03:46:22,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:22,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488788559] [2022-11-03 03:46:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:22,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:22,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:22,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:46:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:22,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:22,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:22,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488788559] [2022-11-03 03:46:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488788559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:22,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:22,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111059547] [2022-11-03 03:46:22,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:22,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:22,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:22,992 INFO L87 Difference]: Start difference. First operand 563 states and 923 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:23,131 INFO L93 Difference]: Finished difference Result 1109 states and 1823 transitions. [2022-11-03 03:46:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:23,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2022-11-03 03:46:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:23,142 INFO L225 Difference]: With dead ends: 1109 [2022-11-03 03:46:23,142 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:46:23,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:23,147 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 12 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:23,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2712 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:46:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:46:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-11-03 03:46:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6552511415525115) internal successors, (725), 453 states have internal predecessors, (725), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 922 transitions. [2022-11-03 03:46:23,216 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 922 transitions. Word has length 104 [2022-11-03 03:46:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:23,217 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 922 transitions. [2022-11-03 03:46:23,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 922 transitions. [2022-11-03 03:46:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 03:46:23,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:23,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:23,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:23,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 679359280, now seen corresponding path program 1 times [2022-11-03 03:46:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753309092] [2022-11-03 03:46:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:23,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:23,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:23,445 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:23,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:46:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:23,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:23,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753309092] [2022-11-03 03:46:23,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753309092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:23,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:23,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55793649] [2022-11-03 03:46:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:23,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:23,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:23,984 INFO L87 Difference]: Start difference. First operand 563 states and 922 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:24,063 INFO L93 Difference]: Finished difference Result 1109 states and 1822 transitions. [2022-11-03 03:46:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:24,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 105 [2022-11-03 03:46:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:24,069 INFO L225 Difference]: With dead ends: 1109 [2022-11-03 03:46:24,069 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:46:24,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:24,075 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 10 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:24,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2712 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:46:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:46:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-11-03 03:46:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6529680365296804) internal successors, (724), 453 states have internal predecessors, (724), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 921 transitions. [2022-11-03 03:46:24,111 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 921 transitions. Word has length 105 [2022-11-03 03:46:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:24,113 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 921 transitions. [2022-11-03 03:46:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 921 transitions. [2022-11-03 03:46:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 03:46:24,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:24,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:24,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:24,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:24,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash 943135792, now seen corresponding path program 1 times [2022-11-03 03:46:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:24,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919996661] [2022-11-03 03:46:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:24,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:24,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:24,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:46:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:24,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:24,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:24,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919996661] [2022-11-03 03:46:24,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919996661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:24,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:24,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:24,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580726681] [2022-11-03 03:46:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:24,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:24,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:24,689 INFO L87 Difference]: Start difference. First operand 563 states and 921 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:24,765 INFO L93 Difference]: Finished difference Result 1109 states and 1821 transitions. [2022-11-03 03:46:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:24,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 106 [2022-11-03 03:46:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:24,778 INFO L225 Difference]: With dead ends: 1109 [2022-11-03 03:46:24,778 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:46:24,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:24,788 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 8 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:24,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2712 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:46:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:46:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-11-03 03:46:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6506849315068493) internal successors, (723), 453 states have internal predecessors, (723), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 920 transitions. [2022-11-03 03:46:24,820 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 920 transitions. Word has length 106 [2022-11-03 03:46:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:24,821 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 920 transitions. [2022-11-03 03:46:24,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 920 transitions. [2022-11-03 03:46:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:46:24,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:24,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:24,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:25,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash 473272492, now seen corresponding path program 1 times [2022-11-03 03:46:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:25,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424697581] [2022-11-03 03:46:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:25,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:25,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:25,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:25,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:46:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:25,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:25,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:25,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424697581] [2022-11-03 03:46:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424697581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:25,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:25,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597645303] [2022-11-03 03:46:25,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:25,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:25,379 INFO L87 Difference]: Start difference. First operand 563 states and 920 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:25,448 INFO L93 Difference]: Finished difference Result 1109 states and 1820 transitions. [2022-11-03 03:46:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 107 [2022-11-03 03:46:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:25,453 INFO L225 Difference]: With dead ends: 1109 [2022-11-03 03:46:25,453 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:46:25,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:25,457 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 6 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:25,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2712 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:46:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:46:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-11-03 03:46:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 438 states have (on average 1.6484018264840183) internal successors, (722), 453 states have internal predecessors, (722), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 919 transitions. [2022-11-03 03:46:25,479 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 919 transitions. Word has length 107 [2022-11-03 03:46:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:25,479 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 919 transitions. [2022-11-03 03:46:25,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 919 transitions. [2022-11-03 03:46:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:46:25,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:25,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:25,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:25,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:25,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1264588500, now seen corresponding path program 1 times [2022-11-03 03:46:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:25,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204265201] [2022-11-03 03:46:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:25,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:25,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:25,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:46:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:46:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:26,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:26,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:26,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204265201] [2022-11-03 03:46:26,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204265201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:26,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:26,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:26,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692070016] [2022-11-03 03:46:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:26,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:26,093 INFO L87 Difference]: Start difference. First operand 563 states and 919 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:26,290 INFO L93 Difference]: Finished difference Result 1120 states and 1837 transitions. [2022-11-03 03:46:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:46:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 108 [2022-11-03 03:46:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:26,296 INFO L225 Difference]: With dead ends: 1120 [2022-11-03 03:46:26,296 INFO L226 Difference]: Without dead ends: 578 [2022-11-03 03:46:26,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:26,300 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 117 mSDsluCounter, 4425 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5330 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:26,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 5330 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-03 03:46:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 576. [2022-11-03 03:46:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 448 states have (on average 1.6450892857142858) internal successors, (737), 465 states have internal predecessors, (737), 100 states have call successors, (100), 26 states have call predecessors, (100), 27 states have return successors, (102), 97 states have call predecessors, (102), 99 states have call successors, (102) [2022-11-03 03:46:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 939 transitions. [2022-11-03 03:46:26,325 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 939 transitions. Word has length 108 [2022-11-03 03:46:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:26,325 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 939 transitions. [2022-11-03 03:46:26,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 939 transitions. [2022-11-03 03:46:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:46:26,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:26,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:26,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:26,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:26,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1278838645, now seen corresponding path program 1 times [2022-11-03 03:46:26,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:26,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619480556] [2022-11-03 03:46:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:26,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:26,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:26,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:46:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:26,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:26,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:26,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619480556] [2022-11-03 03:46:26,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619480556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:26,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:26,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:26,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855261325] [2022-11-03 03:46:26,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:26,895 INFO L87 Difference]: Start difference. First operand 576 states and 939 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:26,964 INFO L93 Difference]: Finished difference Result 1127 states and 1848 transitions. [2022-11-03 03:46:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:46:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 108 [2022-11-03 03:46:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:26,969 INFO L225 Difference]: With dead ends: 1127 [2022-11-03 03:46:26,969 INFO L226 Difference]: Without dead ends: 572 [2022-11-03 03:46:26,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:26,973 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 6 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:26,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2711 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:46:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-03 03:46:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2022-11-03 03:46:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 446 states have (on average 1.6457399103139014) internal successors, (734), 462 states have internal predecessors, (734), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 96 states have call predecessors, (99), 98 states have call successors, (99) [2022-11-03 03:46:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 932 transitions. [2022-11-03 03:46:26,995 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 932 transitions. Word has length 108 [2022-11-03 03:46:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:26,996 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 932 transitions. [2022-11-03 03:46:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 932 transitions. [2022-11-03 03:46:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:46:26,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:27,000 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:27,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:27,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash 440907976, now seen corresponding path program 1 times [2022-11-03 03:46:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137915688] [2022-11-03 03:46:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:27,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:27,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:27,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:46:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:27,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:27,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137915688] [2022-11-03 03:46:27,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137915688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:27,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:27,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:27,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816915420] [2022-11-03 03:46:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:27,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:27,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:27,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:27,520 INFO L87 Difference]: Start difference. First operand 572 states and 932 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:27,750 INFO L93 Difference]: Finished difference Result 1152 states and 1892 transitions. [2022-11-03 03:46:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:46:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 109 [2022-11-03 03:46:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:27,758 INFO L225 Difference]: With dead ends: 1152 [2022-11-03 03:46:27,758 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 03:46:27,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:27,764 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 114 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:27,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2540 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:46:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 03:46:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 577. [2022-11-03 03:46:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6341463414634145) internal successors, (737), 466 states have internal predecessors, (737), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 934 transitions. [2022-11-03 03:46:27,798 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 934 transitions. Word has length 109 [2022-11-03 03:46:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:27,798 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 934 transitions. [2022-11-03 03:46:27,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 934 transitions. [2022-11-03 03:46:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 03:46:27,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:27,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:27,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:28,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:28,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1397208463, now seen corresponding path program 1 times [2022-11-03 03:46:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:28,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216063188] [2022-11-03 03:46:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:28,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:28,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:28,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:46:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:28,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:28,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216063188] [2022-11-03 03:46:28,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216063188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:28,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:28,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649781114] [2022-11-03 03:46:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:28,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:28,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:28,337 INFO L87 Difference]: Start difference. First operand 577 states and 934 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:28,505 INFO L93 Difference]: Finished difference Result 1103 states and 1788 transitions. [2022-11-03 03:46:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:28,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 110 [2022-11-03 03:46:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:28,510 INFO L225 Difference]: With dead ends: 1103 [2022-11-03 03:46:28,510 INFO L226 Difference]: Without dead ends: 577 [2022-11-03 03:46:28,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:28,515 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 78 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:28,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2543 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-03 03:46:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-11-03 03:46:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6252771618625277) internal successors, (733), 466 states have internal predecessors, (733), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 930 transitions. [2022-11-03 03:46:28,535 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 930 transitions. Word has length 110 [2022-11-03 03:46:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:28,536 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 930 transitions. [2022-11-03 03:46:28,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 930 transitions. [2022-11-03 03:46:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:46:28,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:28,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:28,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:28,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash -773491411, now seen corresponding path program 1 times [2022-11-03 03:46:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:28,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111678890] [2022-11-03 03:46:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:28,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:28,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:46:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:29,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:29,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111678890] [2022-11-03 03:46:29,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111678890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:29,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:29,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639375523] [2022-11-03 03:46:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:29,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:29,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:29,180 INFO L87 Difference]: Start difference. First operand 577 states and 930 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:29,341 INFO L93 Difference]: Finished difference Result 1103 states and 1784 transitions. [2022-11-03 03:46:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2022-11-03 03:46:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:29,347 INFO L225 Difference]: With dead ends: 1103 [2022-11-03 03:46:29,347 INFO L226 Difference]: Without dead ends: 577 [2022-11-03 03:46:29,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:29,351 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 73 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:29,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 2543 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-03 03:46:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-11-03 03:46:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6164079822616408) internal successors, (729), 466 states have internal predecessors, (729), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 926 transitions. [2022-11-03 03:46:29,371 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 926 transitions. Word has length 111 [2022-11-03 03:46:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:29,371 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 926 transitions. [2022-11-03 03:46:29,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 926 transitions. [2022-11-03 03:46:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:46:29,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:29,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:29,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:29,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:29,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash -294243923, now seen corresponding path program 1 times [2022-11-03 03:46:29,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071633343] [2022-11-03 03:46:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:29,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:29,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:46:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:46:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:29,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:29,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:29,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071633343] [2022-11-03 03:46:29,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071633343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:29,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:29,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227709697] [2022-11-03 03:46:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:29,982 INFO L87 Difference]: Start difference. First operand 577 states and 926 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:30,151 INFO L93 Difference]: Finished difference Result 1112 states and 1794 transitions. [2022-11-03 03:46:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:46:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 111 [2022-11-03 03:46:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:30,157 INFO L225 Difference]: With dead ends: 1112 [2022-11-03 03:46:30,157 INFO L226 Difference]: Without dead ends: 565 [2022-11-03 03:46:30,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:30,161 INFO L413 NwaCegarLoop]: 895 mSDtfsCounter, 107 mSDsluCounter, 4351 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 5246 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:30,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 5246 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-03 03:46:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 556. [2022-11-03 03:46:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 430 states have (on average 1.6093023255813954) internal successors, (692), 445 states have internal predecessors, (692), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 889 transitions. [2022-11-03 03:46:30,182 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 889 transitions. Word has length 111 [2022-11-03 03:46:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:30,182 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 889 transitions. [2022-11-03 03:46:30,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 889 transitions. [2022-11-03 03:46:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:46:30,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:30,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:30,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:30,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:30,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1096954668, now seen corresponding path program 1 times [2022-11-03 03:46:30,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:30,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556779612] [2022-11-03 03:46:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:30,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:30,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:30,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:30,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:46:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:30,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:30,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:30,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556779612] [2022-11-03 03:46:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556779612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:30,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:30,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397374150] [2022-11-03 03:46:30,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:30,730 INFO L87 Difference]: Start difference. First operand 556 states and 889 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:30,828 INFO L93 Difference]: Finished difference Result 1082 states and 1743 transitions. [2022-11-03 03:46:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 112 [2022-11-03 03:46:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:30,833 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:46:30,834 INFO L226 Difference]: Without dead ends: 556 [2022-11-03 03:46:30,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:30,837 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 41 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:30,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2543 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-03 03:46:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2022-11-03 03:46:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 430 states have (on average 1.6069767441860465) internal successors, (691), 445 states have internal predecessors, (691), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 888 transitions. [2022-11-03 03:46:30,857 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 888 transitions. Word has length 112 [2022-11-03 03:46:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:30,857 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 888 transitions. [2022-11-03 03:46:30,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 888 transitions. [2022-11-03 03:46:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:46:30,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:30,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:30,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:31,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:31,083 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash 9342354, now seen corresponding path program 1 times [2022-11-03 03:46:31,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:31,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705907795] [2022-11-03 03:46:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:31,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:31,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:31,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:46:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:31,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:31,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705907795] [2022-11-03 03:46:31,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705907795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:31,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:31,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742132246] [2022-11-03 03:46:31,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:31,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:31,439 INFO L87 Difference]: Start difference. First operand 556 states and 888 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:31,545 INFO L93 Difference]: Finished difference Result 1082 states and 1742 transitions. [2022-11-03 03:46:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-11-03 03:46:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:31,550 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:46:31,550 INFO L226 Difference]: Without dead ends: 556 [2022-11-03 03:46:31,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:31,554 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 39 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:31,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2543 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-03 03:46:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2022-11-03 03:46:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 430 states have (on average 1.6046511627906976) internal successors, (690), 445 states have internal predecessors, (690), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 887 transitions. [2022-11-03 03:46:31,580 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 887 transitions. Word has length 113 [2022-11-03 03:46:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:31,580 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 887 transitions. [2022-11-03 03:46:31,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 887 transitions. [2022-11-03 03:46:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:46:31,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:31,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:31,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:31,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:31,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash 70050587, now seen corresponding path program 1 times [2022-11-03 03:46:31,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:31,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267876433] [2022-11-03 03:46:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:31,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:31,802 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:31,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:46:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:46:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:32,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:32,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267876433] [2022-11-03 03:46:32,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267876433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:32,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:32,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214102822] [2022-11-03 03:46:32,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:32,101 INFO L87 Difference]: Start difference. First operand 556 states and 887 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:32,200 INFO L93 Difference]: Finished difference Result 1082 states and 1741 transitions. [2022-11-03 03:46:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:46:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2022-11-03 03:46:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:32,205 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:46:32,205 INFO L226 Difference]: Without dead ends: 556 [2022-11-03 03:46:32,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:32,209 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 65 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:32,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2524 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:46:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-03 03:46:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2022-11-03 03:46:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 430 states have (on average 1.6023255813953488) internal successors, (689), 445 states have internal predecessors, (689), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 886 transitions. [2022-11-03 03:46:32,229 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 886 transitions. Word has length 114 [2022-11-03 03:46:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:32,229 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 886 transitions. [2022-11-03 03:46:32,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:46:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 886 transitions. [2022-11-03 03:46:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:46:32,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:32,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:32,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:32,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:32,450 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1806432231, now seen corresponding path program 1 times [2022-11-03 03:46:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:32,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673501851] [2022-11-03 03:46:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:32,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:32,453 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:32,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:46:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:32,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:46:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:46:32,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:32,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:32,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673501851] [2022-11-03 03:46:32,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673501851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:32,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:32,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:46:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550777907] [2022-11-03 03:46:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:46:32,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:46:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:32,821 INFO L87 Difference]: Start difference. First operand 556 states and 886 transitions. Second operand has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:33,066 INFO L93 Difference]: Finished difference Result 1081 states and 1737 transitions. [2022-11-03 03:46:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:46:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 114 [2022-11-03 03:46:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:33,072 INFO L225 Difference]: With dead ends: 1081 [2022-11-03 03:46:33,072 INFO L226 Difference]: Without dead ends: 561 [2022-11-03 03:46:33,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:33,075 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 45 mSDsluCounter, 5023 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 5866 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:33,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 5866 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:46:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-03 03:46:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 558. [2022-11-03 03:46:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 432 states have (on average 1.5972222222222223) internal successors, (690), 447 states have internal predecessors, (690), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-03 03:46:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 887 transitions. [2022-11-03 03:46:33,096 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 887 transitions. Word has length 114 [2022-11-03 03:46:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:33,096 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 887 transitions. [2022-11-03 03:46:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 887 transitions. [2022-11-03 03:46:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 03:46:33,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:33,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:33,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:33,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:33,317 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash 983081671, now seen corresponding path program 1 times [2022-11-03 03:46:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:33,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230219033] [2022-11-03 03:46:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:33,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:33,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:33,319 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:33,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:46:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:46:33,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:46:33,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:33,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:33,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230219033] [2022-11-03 03:46:33,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230219033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:33,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:33,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236734492] [2022-11-03 03:46:33,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:33,722 INFO L87 Difference]: Start difference. First operand 558 states and 887 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:34,687 INFO L93 Difference]: Finished difference Result 1077 states and 1758 transitions. [2022-11-03 03:46:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:46:34,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2022-11-03 03:46:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:34,692 INFO L225 Difference]: With dead ends: 1077 [2022-11-03 03:46:34,692 INFO L226 Difference]: Without dead ends: 562 [2022-11-03 03:46:34,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:46:34,696 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 819 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:34,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 2140 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:46:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-03 03:46:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2022-11-03 03:46:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 435 states have (on average 1.5931034482758621) internal successors, (693), 450 states have internal predecessors, (693), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (99), 96 states have call predecessors, (99), 98 states have call successors, (99) [2022-11-03 03:46:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 891 transitions. [2022-11-03 03:46:34,722 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 891 transitions. Word has length 115 [2022-11-03 03:46:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:34,722 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 891 transitions. [2022-11-03 03:46:34,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 891 transitions. [2022-11-03 03:46:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 03:46:34,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:34,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:34,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:34,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:34,942 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1361102837, now seen corresponding path program 1 times [2022-11-03 03:46:34,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:34,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747963851] [2022-11-03 03:46:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:34,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:34,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:34,944 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:34,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:46:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:46:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:46:35,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:35,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747963851] [2022-11-03 03:46:35,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747963851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:35,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:35,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134081943] [2022-11-03 03:46:35,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:35,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:35,396 INFO L87 Difference]: Start difference. First operand 562 states and 891 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:36,335 INFO L93 Difference]: Finished difference Result 1086 states and 1765 transitions. [2022-11-03 03:46:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:46:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2022-11-03 03:46:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:36,340 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 03:46:36,340 INFO L226 Difference]: Without dead ends: 567 [2022-11-03 03:46:36,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:46:36,346 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 807 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:36,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 2141 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:46:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-03 03:46:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-11-03 03:46:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 439 states have (on average 1.5876993166287017) internal successors, (697), 454 states have internal predecessors, (697), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (100), 96 states have call predecessors, (100), 98 states have call successors, (100) [2022-11-03 03:46:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 896 transitions. [2022-11-03 03:46:36,377 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 896 transitions. Word has length 118 [2022-11-03 03:46:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:36,377 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 896 transitions. [2022-11-03 03:46:36,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 896 transitions. [2022-11-03 03:46:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 03:46:36,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:36,381 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:36,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:36,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:36,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash 557854339, now seen corresponding path program 1 times [2022-11-03 03:46:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:36,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793729030] [2022-11-03 03:46:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:36,601 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:36,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:46:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:46:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:46:37,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:37,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:37,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793729030] [2022-11-03 03:46:37,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793729030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:37,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:37,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:37,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57673656] [2022-11-03 03:46:37,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:37,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:37,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:37,039 INFO L87 Difference]: Start difference. First operand 567 states and 896 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:37,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:37,967 INFO L93 Difference]: Finished difference Result 1097 states and 1774 transitions. [2022-11-03 03:46:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:46:37,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2022-11-03 03:46:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:37,972 INFO L225 Difference]: With dead ends: 1097 [2022-11-03 03:46:37,972 INFO L226 Difference]: Without dead ends: 573 [2022-11-03 03:46:37,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:46:37,976 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 805 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:37,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 2141 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:46:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-03 03:46:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2022-11-03 03:46:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 444 states have (on average 1.5810810810810811) internal successors, (702), 459 states have internal predecessors, (702), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (101), 96 states have call predecessors, (101), 98 states have call successors, (101) [2022-11-03 03:46:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 902 transitions. [2022-11-03 03:46:38,009 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 902 transitions. Word has length 121 [2022-11-03 03:46:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:38,009 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 902 transitions. [2022-11-03 03:46:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 902 transitions. [2022-11-03 03:46:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:46:38,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:38,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:38,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:38,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:38,231 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash -458123991, now seen corresponding path program 1 times [2022-11-03 03:46:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513180977] [2022-11-03 03:46:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:38,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:38,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:38,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:46:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:46:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:46:38,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:38,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513180977] [2022-11-03 03:46:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513180977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:38,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:38,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115458053] [2022-11-03 03:46:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:38,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:38,707 INFO L87 Difference]: Start difference. First operand 573 states and 902 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:39,594 INFO L93 Difference]: Finished difference Result 1110 states and 1785 transitions. [2022-11-03 03:46:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:46:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2022-11-03 03:46:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:39,599 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 03:46:39,599 INFO L226 Difference]: Without dead ends: 580 [2022-11-03 03:46:39,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:46:39,603 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 817 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:39,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 2141 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:46:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-03 03:46:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-11-03 03:46:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 450 states have (on average 1.5733333333333333) internal successors, (708), 465 states have internal predecessors, (708), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2022-11-03 03:46:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 909 transitions. [2022-11-03 03:46:39,630 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 909 transitions. Word has length 124 [2022-11-03 03:46:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:39,631 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 909 transitions. [2022-11-03 03:46:39,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:46:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 909 transitions. [2022-11-03 03:46:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:46:39,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:39,635 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:39,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:39,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:39,851 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash 698932287, now seen corresponding path program 1 times [2022-11-03 03:46:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:39,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027265631] [2022-11-03 03:46:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:39,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:39,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:46:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:46:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:46:40,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:40,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027265631] [2022-11-03 03:46:40,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027265631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:40,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:40,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:46:40,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854959091] [2022-11-03 03:46:40,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:40,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:46:40,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:40,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:46:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:46:40,378 INFO L87 Difference]: Start difference. First operand 580 states and 909 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:46:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:49,092 INFO L93 Difference]: Finished difference Result 1950 states and 3138 transitions. [2022-11-03 03:46:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:46:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2022-11-03 03:46:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:49,106 INFO L225 Difference]: With dead ends: 1950 [2022-11-03 03:46:49,106 INFO L226 Difference]: Without dead ends: 1413 [2022-11-03 03:46:49,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:46:49,110 INFO L413 NwaCegarLoop]: 1477 mSDtfsCounter, 1711 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 6946 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1821 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 7613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 6946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:49,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1821 Valid, 4865 Invalid, 7613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 6946 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 03:46:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-11-03 03:46:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1191. [2022-11-03 03:46:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 902 states have (on average 1.5776053215077606) internal successors, (1423), 939 states have internal predecessors, (1423), 224 states have call successors, (224), 59 states have call predecessors, (224), 64 states have return successors, (249), 223 states have call predecessors, (249), 222 states have call successors, (249) [2022-11-03 03:46:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1896 transitions. [2022-11-03 03:46:49,195 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1896 transitions. Word has length 127 [2022-11-03 03:46:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:49,196 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1896 transitions. [2022-11-03 03:46:49,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:46:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1896 transitions. [2022-11-03 03:46:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 03:46:49,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:49,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:49,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:49,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:49,419 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash -606377829, now seen corresponding path program 1 times [2022-11-03 03:46:49,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:49,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458012645] [2022-11-03 03:46:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:49,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:49,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:49,421 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:46:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:49,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:46:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:46:49,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:49,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:49,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458012645] [2022-11-03 03:46:49,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458012645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:49,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:49,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:46:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486942461] [2022-11-03 03:46:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:46:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:46:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:49,790 INFO L87 Difference]: Start difference. First operand 1191 states and 1896 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:50,043 INFO L93 Difference]: Finished difference Result 2309 states and 3699 transitions. [2022-11-03 03:46:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:46:50,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2022-11-03 03:46:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:50,051 INFO L225 Difference]: With dead ends: 2309 [2022-11-03 03:46:50,051 INFO L226 Difference]: Without dead ends: 1151 [2022-11-03 03:46:50,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:50,058 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 57 mSDsluCounter, 5020 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5863 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:50,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5863 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:46:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-11-03 03:46:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1148. [2022-11-03 03:46:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 870 states have (on average 1.5839080459770114) internal successors, (1378), 906 states have internal predecessors, (1378), 218 states have call successors, (218), 56 states have call predecessors, (218), 59 states have return successors, (236), 216 states have call predecessors, (236), 216 states have call successors, (236) [2022-11-03 03:46:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1832 transitions. [2022-11-03 03:46:50,146 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1832 transitions. Word has length 130 [2022-11-03 03:46:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:50,146 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1832 transitions. [2022-11-03 03:46:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:46:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1832 transitions. [2022-11-03 03:46:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:46:50,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:50,150 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:50,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:50,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:50,366 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:50,366 INFO L85 PathProgramCache]: Analyzing trace with hash -10164912, now seen corresponding path program 1 times [2022-11-03 03:46:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:50,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22146321] [2022-11-03 03:46:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:50,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:50,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:50,368 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:50,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:46:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:50,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:46:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:46:50,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:50,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:50,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22146321] [2022-11-03 03:46:50,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22146321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:50,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:50,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997883746] [2022-11-03 03:46:50,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:50,813 INFO L87 Difference]: Start difference. First operand 1148 states and 1832 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:46:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:55,391 INFO L93 Difference]: Finished difference Result 2875 states and 4638 transitions. [2022-11-03 03:46:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 135 [2022-11-03 03:46:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:55,404 INFO L225 Difference]: With dead ends: 2875 [2022-11-03 03:46:55,404 INFO L226 Difference]: Without dead ends: 1767 [2022-11-03 03:46:55,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:55,411 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1991 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 3096 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 3096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:55,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2099 Valid, 2093 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 3096 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 03:46:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2022-11-03 03:46:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1724. [2022-11-03 03:46:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1296 states have (on average 1.5871913580246915) internal successors, (2057), 1353 states have internal predecessors, (2057), 337 states have call successors, (337), 81 states have call predecessors, (337), 90 states have return successors, (380), 338 states have call predecessors, (380), 334 states have call successors, (380) [2022-11-03 03:46:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2774 transitions. [2022-11-03 03:46:55,561 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2774 transitions. Word has length 135 [2022-11-03 03:46:55,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:55,561 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2774 transitions. [2022-11-03 03:46:55,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:46:55,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2774 transitions. [2022-11-03 03:46:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:46:55,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:55,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:55,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:55,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:55,783 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash -135176152, now seen corresponding path program 1 times [2022-11-03 03:46:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:55,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707382651] [2022-11-03 03:46:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:55,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:55,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:55,785 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:55,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:46:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:46:56,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:56,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707382651] [2022-11-03 03:46:56,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707382651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:56,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:56,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:46:56,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244262117] [2022-11-03 03:46:56,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:56,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:56,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:56,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:46:56,234 INFO L87 Difference]: Start difference. First operand 1724 states and 2774 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:46:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:57,455 INFO L93 Difference]: Finished difference Result 4950 states and 8049 transitions. [2022-11-03 03:46:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:46:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 136 [2022-11-03 03:46:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:57,476 INFO L225 Difference]: With dead ends: 4950 [2022-11-03 03:46:57,476 INFO L226 Difference]: Without dead ends: 3266 [2022-11-03 03:46:57,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:46:57,486 INFO L413 NwaCegarLoop]: 1006 mSDtfsCounter, 710 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 3113 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:57,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 3113 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:46:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2022-11-03 03:46:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 3251. [2022-11-03 03:46:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2426 states have (on average 1.5663643858202803) internal successors, (3800), 2536 states have internal predecessors, (3800), 652 states have call successors, (652), 162 states have call predecessors, (652), 172 states have return successors, (740), 647 states have call predecessors, (740), 646 states have call successors, (740) [2022-11-03 03:46:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 5192 transitions. [2022-11-03 03:46:57,774 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 5192 transitions. Word has length 136 [2022-11-03 03:46:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:57,775 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 5192 transitions. [2022-11-03 03:46:57,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:46:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 5192 transitions. [2022-11-03 03:46:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 03:46:57,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:57,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:57,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:46:57,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:57,998 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash -903525821, now seen corresponding path program 1 times [2022-11-03 03:46:57,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:57,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405046678] [2022-11-03 03:46:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:57,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:57,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:57,999 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:58,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:46:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:58,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:46:58,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:46:58,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:58,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405046678] [2022-11-03 03:46:58,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405046678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:58,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:58,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:58,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452309088] [2022-11-03 03:46:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:58,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:46:58,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:46:58,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:58,682 INFO L87 Difference]: Start difference. First operand 3251 states and 5192 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:46:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:59,890 INFO L93 Difference]: Finished difference Result 9486 states and 15261 transitions. [2022-11-03 03:46:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:46:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 138 [2022-11-03 03:46:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:59,920 INFO L225 Difference]: With dead ends: 9486 [2022-11-03 03:46:59,920 INFO L226 Difference]: Without dead ends: 6275 [2022-11-03 03:46:59,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:46:59,935 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 763 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 2546 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:59,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 2546 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:46:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2022-11-03 03:47:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 5835. [2022-11-03 03:47:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5835 states, 4442 states have (on average 1.5718144979738857) internal successors, (6982), 4605 states have internal predecessors, (6982), 1075 states have call successors, (1075), 297 states have call predecessors, (1075), 317 states have return successors, (1275), 1030 states have call predecessors, (1275), 1063 states have call successors, (1275) [2022-11-03 03:47:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5835 states to 5835 states and 9332 transitions. [2022-11-03 03:47:00,494 INFO L78 Accepts]: Start accepts. Automaton has 5835 states and 9332 transitions. Word has length 138 [2022-11-03 03:47:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:00,495 INFO L495 AbstractCegarLoop]: Abstraction has 5835 states and 9332 transitions. [2022-11-03 03:47:00,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5835 states and 9332 transitions. [2022-11-03 03:47:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:47:00,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:00,500 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-03 03:47:00,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:00,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash 965099701, now seen corresponding path program 1 times [2022-11-03 03:47:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:00,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860973280] [2022-11-03 03:47:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:00,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:00,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:00,719 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:00,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:47:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:47:01,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:01,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860973280] [2022-11-03 03:47:01,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860973280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:01,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:01,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:01,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768115522] [2022-11-03 03:47:01,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:01,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:01,211 INFO L87 Difference]: Start difference. First operand 5835 states and 9332 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:03,121 INFO L93 Difference]: Finished difference Result 14804 states and 24036 transitions. [2022-11-03 03:47:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:47:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 142 [2022-11-03 03:47:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:03,176 INFO L225 Difference]: With dead ends: 14804 [2022-11-03 03:47:03,177 INFO L226 Difference]: Without dead ends: 9009 [2022-11-03 03:47:03,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:03,206 INFO L413 NwaCegarLoop]: 1044 mSDtfsCounter, 814 mSDsluCounter, 2752 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 3796 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:03,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 3796 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:47:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9009 states. [2022-11-03 03:47:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9009 to 8971. [2022-11-03 03:47:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 6774 states have (on average 1.5615589016829052) internal successors, (10578), 7046 states have internal predecessors, (10578), 1698 states have call successors, (1698), 456 states have call predecessors, (1698), 498 states have return successors, (2203), 1661 states have call predecessors, (2203), 1680 states have call successors, (2203) [2022-11-03 03:47:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 14479 transitions. [2022-11-03 03:47:04,248 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 14479 transitions. Word has length 142 [2022-11-03 03:47:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:04,249 INFO L495 AbstractCegarLoop]: Abstraction has 8971 states and 14479 transitions. [2022-11-03 03:47:04,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 14479 transitions. [2022-11-03 03:47:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:47:04,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:04,254 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-03 03:47:04,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:04,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:04,471 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:04,472 INFO L85 PathProgramCache]: Analyzing trace with hash 472473527, now seen corresponding path program 1 times [2022-11-03 03:47:04,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:04,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171673535] [2022-11-03 03:47:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:04,473 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:04,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:47:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:47:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:47:05,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:05,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:05,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171673535] [2022-11-03 03:47:05,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171673535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:05,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:05,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:47:05,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964629052] [2022-11-03 03:47:05,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:47:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:47:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:05,068 INFO L87 Difference]: Start difference. First operand 8971 states and 14479 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:47:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:11,159 INFO L93 Difference]: Finished difference Result 14937 states and 23987 transitions. [2022-11-03 03:47:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:47:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 142 [2022-11-03 03:47:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:11,215 INFO L225 Difference]: With dead ends: 14937 [2022-11-03 03:47:11,215 INFO L226 Difference]: Without dead ends: 9117 [2022-11-03 03:47:11,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:47:11,255 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1983 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 4101 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 2516 SdHoareTripleChecker+Invalid, 4603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 4101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:11,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2093 Valid, 2516 Invalid, 4603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 4101 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 03:47:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2022-11-03 03:47:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 8947. [2022-11-03 03:47:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8947 states, 6762 states have (on average 1.5607808340727596) internal successors, (10554), 7034 states have internal predecessors, (10554), 1686 states have call successors, (1686), 456 states have call predecessors, (1686), 498 states have return successors, (2191), 1649 states have call predecessors, (2191), 1668 states have call successors, (2191) [2022-11-03 03:47:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8947 states to 8947 states and 14431 transitions. [2022-11-03 03:47:12,215 INFO L78 Accepts]: Start accepts. Automaton has 8947 states and 14431 transitions. Word has length 142 [2022-11-03 03:47:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:12,216 INFO L495 AbstractCegarLoop]: Abstraction has 8947 states and 14431 transitions. [2022-11-03 03:47:12,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:47:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8947 states and 14431 transitions. [2022-11-03 03:47:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 03:47:12,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:12,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:12,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:12,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:12,439 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash 227514839, now seen corresponding path program 1 times [2022-11-03 03:47:12,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873739536] [2022-11-03 03:47:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:12,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:12,442 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:12,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:47:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:12,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:47:13,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:13,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:13,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873739536] [2022-11-03 03:47:13,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873739536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:13,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:13,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:47:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353477895] [2022-11-03 03:47:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:13,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:13,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:13,063 INFO L87 Difference]: Start difference. First operand 8947 states and 14431 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:14,360 INFO L93 Difference]: Finished difference Result 23887 states and 39364 transitions. [2022-11-03 03:47:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 149 [2022-11-03 03:47:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:14,450 INFO L225 Difference]: With dead ends: 23887 [2022-11-03 03:47:14,451 INFO L226 Difference]: Without dead ends: 15163 [2022-11-03 03:47:14,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:14,494 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 788 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:14,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 1826 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15163 states. [2022-11-03 03:47:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15163 to 15161. [2022-11-03 03:47:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 11388 states have (on average 1.5561116965226554) internal successors, (17721), 11878 states have internal predecessors, (17721), 2930 states have call successors, (2930), 774 states have call predecessors, (2930), 842 states have return successors, (4301), 2891 states have call predecessors, (4301), 2900 states have call successors, (4301) [2022-11-03 03:47:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 24952 transitions. [2022-11-03 03:47:15,649 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 24952 transitions. Word has length 149 [2022-11-03 03:47:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:15,649 INFO L495 AbstractCegarLoop]: Abstraction has 15161 states and 24952 transitions. [2022-11-03 03:47:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 24952 transitions. [2022-11-03 03:47:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 03:47:15,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:15,654 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:15,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:15,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:15,872 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1266175128, now seen corresponding path program 1 times [2022-11-03 03:47:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476361173] [2022-11-03 03:47:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:15,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:15,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:15,875 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:15,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:47:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:16,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:47:16,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:16,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:16,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476361173] [2022-11-03 03:47:16,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476361173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:16,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:16,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:47:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724308449] [2022-11-03 03:47:16,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:16,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:16,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:16,617 INFO L87 Difference]: Start difference. First operand 15161 states and 24952 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:18,953 INFO L93 Difference]: Finished difference Result 42437 states and 72000 transitions. [2022-11-03 03:47:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2022-11-03 03:47:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:19,112 INFO L225 Difference]: With dead ends: 42437 [2022-11-03 03:47:19,113 INFO L226 Difference]: Without dead ends: 27621 [2022-11-03 03:47:19,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:19,205 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 787 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:19,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1835 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27621 states. [2022-11-03 03:47:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27621 to 27619. [2022-11-03 03:47:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27619 states, 20664 states have (on average 1.5534262485481998) internal successors, (32100), 21590 states have internal predecessors, (32100), 5424 states have call successors, (5424), 1410 states have call predecessors, (5424), 1530 states have return successors, (9421), 5381 states have call predecessors, (9421), 5370 states have call successors, (9421) [2022-11-03 03:47:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27619 states to 27619 states and 46945 transitions. [2022-11-03 03:47:22,028 INFO L78 Accepts]: Start accepts. Automaton has 27619 states and 46945 transitions. Word has length 150 [2022-11-03 03:47:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:22,028 INFO L495 AbstractCegarLoop]: Abstraction has 27619 states and 46945 transitions. [2022-11-03 03:47:22,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 27619 states and 46945 transitions. [2022-11-03 03:47:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 03:47:22,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:22,034 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:22,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:22,251 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash -364720644, now seen corresponding path program 1 times [2022-11-03 03:47:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:22,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137318655] [2022-11-03 03:47:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:22,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:22,254 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:22,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:47:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:47:22,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:22,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:22,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137318655] [2022-11-03 03:47:22,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137318655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:22,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:22,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:47:22,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748876693] [2022-11-03 03:47:22,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:22,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:22,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:22,790 INFO L87 Difference]: Start difference. First operand 27619 states and 46945 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:26,975 INFO L93 Difference]: Finished difference Result 79597 states and 141508 transitions. [2022-11-03 03:47:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2022-11-03 03:47:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:27,379 INFO L225 Difference]: With dead ends: 79597 [2022-11-03 03:47:27,380 INFO L226 Difference]: Without dead ends: 52567 [2022-11-03 03:47:27,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:27,672 INFO L413 NwaCegarLoop]: 1015 mSDtfsCounter, 786 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:27,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 1840 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:47:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52567 states. [2022-11-03 03:47:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52567 to 52565. [2022-11-03 03:47:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52565 states, 39240 states have (on average 1.551605504587156) internal successors, (60885), 41038 states have internal predecessors, (60885), 10418 states have call successors, (10418), 2682 states have call predecessors, (10418), 2906 states have return successors, (22769), 10367 states have call predecessors, (22769), 10316 states have call successors, (22769) [2022-11-03 03:47:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52565 states to 52565 states and 94072 transitions. [2022-11-03 03:47:33,300 INFO L78 Accepts]: Start accepts. Automaton has 52565 states and 94072 transitions. Word has length 151 [2022-11-03 03:47:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:33,301 INFO L495 AbstractCegarLoop]: Abstraction has 52565 states and 94072 transitions. [2022-11-03 03:47:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:47:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 52565 states and 94072 transitions. [2022-11-03 03:47:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:47:33,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:33,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:33,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 03:47:33,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:33,521 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1756249071, now seen corresponding path program 1 times [2022-11-03 03:47:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:33,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541840059] [2022-11-03 03:47:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:33,523 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:33,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0486de6-a94a-4d69-841f-6c25919bc359/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:47:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:33,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:47:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:47:34,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:34,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:34,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541840059] [2022-11-03 03:47:34,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541840059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:34,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:34,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824730666] [2022-11-03 03:47:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:34,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:47:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:34,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:47:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:34,158 INFO L87 Difference]: Start difference. First operand 52565 states and 94072 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 7 states have internal predecessors, (107), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15)