./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/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_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/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_348a02da-3836-455c-9451-ac551ae7e1b8/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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- 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 01:43:07,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:43:07,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:43:07,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:43:07,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:43:07,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:43:07,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:43:07,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:43:07,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:43:07,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:43:07,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:43:07,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:43:07,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:43:07,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:43:07,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:43:07,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:43:07,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:43:07,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:43:07,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:43:07,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:43:07,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:43:07,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:43:07,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:43:07,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:43:07,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:43:07,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:43:07,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:43:07,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:43:07,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:43:07,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:43:07,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:43:07,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:43:07,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:43:07,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:43:07,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:43:07,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:43:07,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:43:07,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:43:07,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:43:07,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:43:07,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:43:07,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:43:07,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:43:07,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:43:07,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:43:07,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:43:07,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:43:07,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:43:07,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:43:07,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:43:07,998 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:43:07,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:43:07,999 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:43:07,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:43:07,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:43:08,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:43:08,000 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:43:08,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:43:08,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:43:08,001 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:43:08,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:43:08,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:43:08,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:43:08,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:43:08,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:43:08,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:43:08,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:43:08,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:43:08,003 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:43:08,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:43:08,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:43:08,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:43:08,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:43:08,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:43:08,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:08,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:43:08,005 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:43:08,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:43:08,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:43:08,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:43:08,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:43:08,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:43:08,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:43:08,006 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_348a02da-3836-455c-9451-ac551ae7e1b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2022-11-03 01:43:08,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:43:08,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:43:08,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:43:08,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:43:08,346 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:43:08,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2022-11-03 01:43:08,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/8604768f9/6d6784e4dff941d682b41c1855c48e34/FLAGc02bcf557 [2022-11-03 01:43:09,061 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:43:09,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2022-11-03 01:43:09,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/8604768f9/6d6784e4dff941d682b41c1855c48e34/FLAGc02bcf557 [2022-11-03 01:43:09,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/8604768f9/6d6784e4dff941d682b41c1855c48e34 [2022-11-03 01:43:09,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:43:09,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:43:09,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:09,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:43:09,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:43:09,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:09" (1/1) ... [2022-11-03 01:43:09,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596b919b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:09, skipping insertion in model container [2022-11-03 01:43:09,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:09" (1/1) ... [2022-11-03 01:43:09,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:43:09,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:09,728 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_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2022-11-03 01:43:09,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:09,936 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:43:10,039 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_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2022-11-03 01:43:10,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:10,157 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:43:10,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10 WrapperNode [2022-11-03 01:43:10,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:10,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:10,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:43:10,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:43:10,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,330 INFO L138 Inliner]: procedures = 95, calls = 343, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1152 [2022-11-03 01:43:10,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:10,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:43:10,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:43:10,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:43:10,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,413 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:43:10,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:43:10,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:43:10,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:43:10,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (1/1) ... [2022-11-03 01:43:10,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:10,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:43:10,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:43:10,577 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 01:43:10,577 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 01:43:10,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:43:10,578 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 01:43:10,578 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 01:43:10,578 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 01:43:10,579 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 01:43:10,579 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:43:10,579 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:43:10,579 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 01:43:10,579 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 01:43:10,580 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:43:10,580 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:43:10,580 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:43:10,580 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:43:10,580 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:43:10,581 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:43:10,581 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:43:10,581 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:43:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 01:43:10,582 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 01:43:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 01:43:10,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 01:43:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:43:10,583 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:43:10,584 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:43:10,584 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:43:10,584 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:43:10,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:43:10,585 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 01:43:10,586 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 01:43:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:43:10,587 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:43:10,587 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 01:43:10,587 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 01:43:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:43:10,588 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:43:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:43:10,588 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:43:10,588 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:43:10,589 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:43:10,589 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:43:10,589 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:43:10,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:43:10,590 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:43:10,591 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:43:10,592 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:43:10,592 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:43:10,593 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:43:10,593 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:43:10,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:43:10,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:43:10,594 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:43:10,594 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:43:10,821 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:43:10,823 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:43:12,374 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:43:13,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:43:13,319 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:43:13,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:13 BoogieIcfgContainer [2022-11-03 01:43:13,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:43:13,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:43:13,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:43:13,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:43:13,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:43:09" (1/3) ... [2022-11-03 01:43:13,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a165840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:13, skipping insertion in model container [2022-11-03 01:43:13,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:10" (2/3) ... [2022-11-03 01:43:13,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a165840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:13, skipping insertion in model container [2022-11-03 01:43:13,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:13" (3/3) ... [2022-11-03 01:43:13,337 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2022-11-03 01:43:13,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:43:13,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:43:13,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:43:13,491 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;@2d4e7e95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:43:13,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:43:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-03 01:43:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 01:43:13,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:13,544 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:13,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1696278331, now seen corresponding path program 1 times [2022-11-03 01:43:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:13,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734278989] [2022-11-03 01:43:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:13,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:14,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:14,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734278989] [2022-11-03 01:43:14,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734278989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:14,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:14,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932279920] [2022-11-03 01:43:14,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:14,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:43:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:43:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:43:14,331 INFO L87 Difference]: Start difference. First operand has 381 states, 255 states have (on average 1.588235294117647) internal successors, (405), 276 states have internal predecessors, (405), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 01:43:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:14,559 INFO L93 Difference]: Finished difference Result 399 states and 630 transitions. [2022-11-03 01:43:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:43:14,562 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2022-11-03 01:43:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:14,580 INFO L225 Difference]: With dead ends: 399 [2022-11-03 01:43:14,580 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 01:43:14,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:43:14,588 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 560 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 01:43:14,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 560 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 01:43:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-03 01:43:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 253 states have (on average 1.5770750988142292) internal successors, (399), 272 states have internal predecessors, (399), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:43:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 592 transitions. [2022-11-03 01:43:14,679 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 592 transitions. Word has length 88 [2022-11-03 01:43:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:14,681 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 592 transitions. [2022-11-03 01:43:14,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 01:43:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 592 transitions. [2022-11-03 01:43:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 01:43:14,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:14,689 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:43:14,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1539292562, now seen corresponding path program 1 times [2022-11-03 01:43:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378492926] [2022-11-03 01:43:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:15,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378492926] [2022-11-03 01:43:15,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378492926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:15,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:15,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:43:15,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715415201] [2022-11-03 01:43:15,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:15,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:15,622 INFO L87 Difference]: Start difference. First operand 377 states and 592 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 01:43:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:18,453 INFO L93 Difference]: Finished difference Result 1148 states and 1837 transitions. [2022-11-03 01:43:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:43:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-03 01:43:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:18,464 INFO L225 Difference]: With dead ends: 1148 [2022-11-03 01:43:18,465 INFO L226 Difference]: Without dead ends: 794 [2022-11-03 01:43:18,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:43:18,471 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 1135 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:18,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 1846 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 01:43:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-03 01:43:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 745. [2022-11-03 01:43:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 510 states have (on average 1.592156862745098) internal successors, (812), 543 states have internal predecessors, (812), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-03 01:43:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1191 transitions. [2022-11-03 01:43:18,600 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1191 transitions. Word has length 89 [2022-11-03 01:43:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:18,602 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1191 transitions. [2022-11-03 01:43:18,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 01:43:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1191 transitions. [2022-11-03 01:43:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 01:43:18,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:18,608 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:18,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:43:18,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:18,610 INFO L85 PathProgramCache]: Analyzing trace with hash -571796844, now seen corresponding path program 1 times [2022-11-03 01:43:18,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:18,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778477561] [2022-11-03 01:43:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:18,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:19,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:19,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778477561] [2022-11-03 01:43:19,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778477561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:19,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:19,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:43:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288882032] [2022-11-03 01:43:19,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:19,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:19,023 INFO L87 Difference]: Start difference. First operand 745 states and 1191 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:43:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:19,721 INFO L93 Difference]: Finished difference Result 816 states and 1303 transitions. [2022-11-03 01:43:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2022-11-03 01:43:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:19,730 INFO L225 Difference]: With dead ends: 816 [2022-11-03 01:43:19,730 INFO L226 Difference]: Without dead ends: 801 [2022-11-03 01:43:19,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:19,733 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 684 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:19,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1472 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:43:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-03 01:43:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 749. [2022-11-03 01:43:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.5875486381322956) internal successors, (816), 547 states have internal predecessors, (816), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-03 01:43:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1195 transitions. [2022-11-03 01:43:19,812 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1195 transitions. Word has length 93 [2022-11-03 01:43:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:19,814 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1195 transitions. [2022-11-03 01:43:19,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:43:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1195 transitions. [2022-11-03 01:43:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:43:19,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:19,825 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:19,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:43:19,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash -840832870, now seen corresponding path program 1 times [2022-11-03 01:43:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810342127] [2022-11-03 01:43:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:19,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:20,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:20,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810342127] [2022-11-03 01:43:20,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810342127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:20,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:20,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667483128] [2022-11-03 01:43:20,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:20,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:20,232 INFO L87 Difference]: Start difference. First operand 749 states and 1195 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 01:43:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:20,434 INFO L93 Difference]: Finished difference Result 768 states and 1219 transitions. [2022-11-03 01:43:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2022-11-03 01:43:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:20,448 INFO L225 Difference]: With dead ends: 768 [2022-11-03 01:43:20,449 INFO L226 Difference]: Without dead ends: 753 [2022-11-03 01:43:20,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 01:43:20,462 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 30 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:20,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2198 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-03 01:43:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 749. [2022-11-03 01:43:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 514 states have (on average 1.583657587548638) internal successors, (814), 547 states have internal predecessors, (814), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-03 01:43:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1193 transitions. [2022-11-03 01:43:20,618 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1193 transitions. Word has length 98 [2022-11-03 01:43:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:20,620 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1193 transitions. [2022-11-03 01:43:20,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 01:43:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1193 transitions. [2022-11-03 01:43:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 01:43:20,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:20,629 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-03 01:43:20,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:43:20,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1385729553, now seen corresponding path program 1 times [2022-11-03 01:43:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527649047] [2022-11-03 01:43:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:43:24,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:24,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527649047] [2022-11-03 01:43:24,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527649047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:24,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996000966] [2022-11-03 01:43:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:24,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:24,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:24,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:24,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:43:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:25,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:43:25,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:43:25,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:25,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996000966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:25,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:43:25,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-03 01:43:25,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939484702] [2022-11-03 01:43:25,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:25,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:25,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:25,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:43:25,470 INFO L87 Difference]: Start difference. First operand 749 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 01:43:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:25,755 INFO L93 Difference]: Finished difference Result 832 states and 1317 transitions. [2022-11-03 01:43:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2022-11-03 01:43:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:25,764 INFO L225 Difference]: With dead ends: 832 [2022-11-03 01:43:25,765 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 01:43:25,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:43:25,770 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 44 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:25,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1729 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 01:43:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 753. [2022-11-03 01:43:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 518 states have (on average 1.579150579150579) internal successors, (818), 551 states have internal predecessors, (818), 189 states have call successors, (189), 45 states have call predecessors, (189), 45 states have return successors, (190), 181 states have call predecessors, (190), 184 states have call successors, (190) [2022-11-03 01:43:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1197 transitions. [2022-11-03 01:43:25,849 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1197 transitions. Word has length 105 [2022-11-03 01:43:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:25,850 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1197 transitions. [2022-11-03 01:43:25,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 01:43:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1197 transitions. [2022-11-03 01:43:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 01:43:25,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:25,855 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 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 01:43:25,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:26,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:26,073 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1502716547, now seen corresponding path program 1 times [2022-11-03 01:43:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:26,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236344924] [2022-11-03 01:43:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:26,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 01:43:28,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236344924] [2022-11-03 01:43:28,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236344924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003930365] [2022-11-03 01:43:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:28,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:28,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:43:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 01:43:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:43:31,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:29,912 WARN L234 SmtUtils]: Spent 53.16s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 01:45:24,595 WARN L234 SmtUtils]: Spent 54.11s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 01:45:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:45:25,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003930365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:25,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090516334] [2022-11-03 01:45:25,584 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-11-03 01:45:25,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:25,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:25,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:25,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:39,201 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 475 for LOIs [2022-11-03 01:45:39,628 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2022-11-03 01:45:43,409 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 586 for LOIs [2022-11-03 01:46:09,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:09,338 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 01:46:09,344 INFO L158 Benchmark]: Toolchain (without parser) took 180072.09ms. Allocated memory was 109.1MB in the beginning and 685.8MB in the end (delta: 576.7MB). Free memory was 79.4MB in the beginning and 435.6MB in the end (delta: -356.3MB). Peak memory consumption was 434.0MB. Max. memory is 16.1GB. [2022-11-03 01:46:09,345 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:46:09,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 893.91ms. Allocated memory is still 109.1MB. Free memory was 79.0MB in the beginning and 53.3MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-03 01:46:09,346 INFO L158 Benchmark]: Boogie Procedure Inliner took 161.31ms. Allocated memory is still 109.1MB. Free memory was 53.3MB in the beginning and 47.6MB in the end (delta: 5.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:46:09,346 INFO L158 Benchmark]: Boogie Preprocessor took 106.74ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 47.6MB in the beginning and 107.4MB in the end (delta: -59.7MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-11-03 01:46:09,347 INFO L158 Benchmark]: RCFGBuilder took 2886.49ms. Allocated memory was 136.3MB in the beginning and 172.0MB in the end (delta: 35.7MB). Free memory was 107.4MB in the beginning and 115.1MB in the end (delta: -7.7MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. [2022-11-03 01:46:09,348 INFO L158 Benchmark]: TraceAbstraction took 176015.27ms. Allocated memory was 172.0MB in the beginning and 685.8MB in the end (delta: 513.8MB). Free memory was 114.1MB in the beginning and 435.6MB in the end (delta: -321.6MB). Peak memory consumption was 406.5MB. Max. memory is 16.1GB. [2022-11-03 01:46:09,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 893.91ms. Allocated memory is still 109.1MB. Free memory was 79.0MB in the beginning and 53.3MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 161.31ms. Allocated memory is still 109.1MB. Free memory was 53.3MB in the beginning and 47.6MB in the end (delta: 5.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 106.74ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 47.6MB in the beginning and 107.4MB in the end (delta: -59.7MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * RCFGBuilder took 2886.49ms. Allocated memory was 136.3MB in the beginning and 172.0MB in the end (delta: 35.7MB). Free memory was 107.4MB in the beginning and 115.1MB in the end (delta: -7.7MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. * TraceAbstraction took 176015.27ms. Allocated memory was 172.0MB in the beginning and 685.8MB in the end (delta: 513.8MB). Free memory was 114.1MB in the beginning and 435.6MB in the end (delta: -321.6MB). Peak memory consumption was 406.5MB. 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 01:46:09,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/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_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/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_348a02da-3836-455c-9451-ac551ae7e1b8/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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- 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 01:46:12,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:46:12,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:46:12,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:46:12,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:46:12,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:46:12,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:46:12,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:46:12,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:46:12,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:46:12,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:46:12,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:46:12,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:46:12,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:46:12,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:46:12,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:46:12,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:46:12,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:46:12,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:46:12,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:46:12,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:46:12,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:46:12,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:46:12,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:46:12,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:46:12,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:46:12,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:46:12,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:46:12,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:46:12,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:46:12,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:46:12,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:46:12,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:46:12,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:46:12,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:46:12,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:46:12,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:46:12,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:46:12,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:46:12,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:46:12,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:46:12,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:46:12,521 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:46:12,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:46:12,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:46:12,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:46:12,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:46:12,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:46:12,526 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:46:12,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:46:12,526 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:46:12,526 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:46:12,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:46:12,528 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:46:12,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:46:12,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:46:12,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:46:12,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:46:12,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:46:12,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:46:12,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:46:12,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:46:12,532 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:46:12,532 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:46:12,533 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:46:12,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:46:12,533 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:46:12,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:46:12,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:46:12,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:46:12,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:46:12,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:46:12,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:46:12,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:46:12,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:46:12,536 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:46:12,537 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:12,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:46:12,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:46:12,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:46:12,538 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_348a02da-3836-455c-9451-ac551ae7e1b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2022-11-03 01:46:13,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:46:13,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:46:13,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:46:13,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:46:13,106 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:46:13,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2022-11-03 01:46:13,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/281cbe613/a32b643ce1d54b2fa097803eeb17c21b/FLAG73acb836b [2022-11-03 01:46:13,994 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:46:14,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2022-11-03 01:46:14,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/281cbe613/a32b643ce1d54b2fa097803eeb17c21b/FLAG73acb836b [2022-11-03 01:46:14,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/data/281cbe613/a32b643ce1d54b2fa097803eeb17c21b [2022-11-03 01:46:14,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:46:14,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:46:14,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:46:14,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:46:14,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:46:14,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:46:14" (1/1) ... [2022-11-03 01:46:14,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e35159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:14, skipping insertion in model container [2022-11-03 01:46:14,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:46:14" (1/1) ... [2022-11-03 01:46:14,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:46:14,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:46:14,898 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_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2022-11-03 01:46:15,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:46:15,087 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 01:46:15,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:46:15,276 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_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2022-11-03 01:46:15,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:46:15,369 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:46:15,435 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_348a02da-3836-455c-9451-ac551ae7e1b8/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2022-11-03 01:46:15,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:46:15,576 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:46:15,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15 WrapperNode [2022-11-03 01:46:15,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:46:15,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:46:15,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:46:15,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:46:15,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,697 INFO L138 Inliner]: procedures = 97, calls = 343, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1091 [2022-11-03 01:46:15,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:46:15,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:46:15,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:46:15,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:46:15,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:46:15,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:46:15,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:46:15,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:46:15,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (1/1) ... [2022-11-03 01:46:15,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:46:15,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:15,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:46:15,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:46:15,958 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 01:46:15,958 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 01:46:15,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:46:15,959 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 01:46:15,959 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 01:46:15,959 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 01:46:15,959 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 01:46:15,959 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:46:15,960 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:46:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 01:46:15,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 01:46:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:46:15,960 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:46:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:46:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:46:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:46:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:46:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:46:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:46:15,962 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 01:46:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 01:46:15,962 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 01:46:15,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 01:46:15,963 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:46:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:46:15,963 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:46:15,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:46:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:46:15,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:46:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:46:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 01:46:15,965 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 01:46:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:46:15,966 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:46:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 01:46:15,966 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 01:46:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:46:15,967 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:46:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:46:15,967 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:46:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:46:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:46:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:46:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:46:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:46:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:46:15,971 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:46:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:46:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:46:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:46:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:46:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:46:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:46:15,974 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:46:16,212 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:46:16,215 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:46:18,126 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:46:18,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:46:18,145 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:46:18,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:46:18 BoogieIcfgContainer [2022-11-03 01:46:18,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:46:18,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:46:18,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:46:18,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:46:18,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:46:14" (1/3) ... [2022-11-03 01:46:18,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf9d2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:46:18, skipping insertion in model container [2022-11-03 01:46:18,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:46:15" (2/3) ... [2022-11-03 01:46:18,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf9d2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:46:18, skipping insertion in model container [2022-11-03 01:46:18,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:46:18" (3/3) ... [2022-11-03 01:46:18,159 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2022-11-03 01:46:18,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:46:18,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:46:18,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:46:18,282 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;@70b30931, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:46:18,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:46:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 471 states have internal predecessors, (759), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-03 01:46:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 01:46:18,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:18,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:18,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2046185368, now seen corresponding path program 1 times [2022-11-03 01:46:18,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:18,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377803109] [2022-11-03 01:46:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:18,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:18,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:18,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:18,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:46:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:46:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:46:19,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:19,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:19,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377803109] [2022-11-03 01:46:19,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377803109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:19,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:19,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:46:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962488621] [2022-11-03 01:46:19,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:19,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:46:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:46:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:46:19,254 INFO L87 Difference]: Start difference. First operand has 576 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 471 states have internal predecessors, (759), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 01:46:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:19,388 INFO L93 Difference]: Finished difference Result 597 states and 987 transitions. [2022-11-03 01:46:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:46:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2022-11-03 01:46:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:19,419 INFO L225 Difference]: With dead ends: 597 [2022-11-03 01:46:19,419 INFO L226 Difference]: Without dead ends: 568 [2022-11-03 01:46:19,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:46:19,429 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:19,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-03 01:46:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-11-03 01:46:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6846846846846846) internal successors, (748), 463 states have internal predecessors, (748), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 941 transitions. [2022-11-03 01:46:19,546 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 941 transitions. Word has length 125 [2022-11-03 01:46:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:19,548 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 941 transitions. [2022-11-03 01:46:19,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 01:46:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 941 transitions. [2022-11-03 01:46:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 01:46:19,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:19,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:19,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:19,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1473529241, now seen corresponding path program 1 times [2022-11-03 01:46:19,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:19,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546196927] [2022-11-03 01:46:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:19,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:19,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:19,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:46:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:20,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:20,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:46:20,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:20,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546196927] [2022-11-03 01:46:20,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546196927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:20,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:20,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:20,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941536289] [2022-11-03 01:46:20,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:20,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:20,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:20,588 INFO L87 Difference]: Start difference. First operand 568 states and 941 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:20,788 INFO L93 Difference]: Finished difference Result 1127 states and 1874 transitions. [2022-11-03 01:46:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2022-11-03 01:46:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:20,804 INFO L225 Difference]: With dead ends: 1127 [2022-11-03 01:46:20,804 INFO L226 Difference]: Without dead ends: 568 [2022-11-03 01:46:20,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 124 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 01:46:20,816 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 14 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:20,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2774 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-03 01:46:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-11-03 01:46:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6824324324324325) internal successors, (747), 463 states have internal predecessors, (747), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 940 transitions. [2022-11-03 01:46:20,900 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 940 transitions. Word has length 127 [2022-11-03 01:46:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:20,901 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 940 transitions. [2022-11-03 01:46:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 940 transitions. [2022-11-03 01:46:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:46:20,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:20,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:20,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:21,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:21,139 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:21,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1802520523, now seen corresponding path program 1 times [2022-11-03 01:46:21,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:21,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748981201] [2022-11-03 01:46:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:21,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:21,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:21,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:21,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:46:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:46:21,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:21,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748981201] [2022-11-03 01:46:21,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748981201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:21,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:21,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:21,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30742348] [2022-11-03 01:46:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:21,872 INFO L87 Difference]: Start difference. First operand 568 states and 940 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:22,008 INFO L93 Difference]: Finished difference Result 1127 states and 1872 transitions. [2022-11-03 01:46:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:22,010 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2022-11-03 01:46:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:22,018 INFO L225 Difference]: With dead ends: 1127 [2022-11-03 01:46:22,018 INFO L226 Difference]: Without dead ends: 568 [2022-11-03 01:46:22,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 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 01:46:22,025 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 12 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:22,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2774 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-03 01:46:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-11-03 01:46:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 463 states have internal predecessors, (746), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 939 transitions. [2022-11-03 01:46:22,069 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 939 transitions. Word has length 129 [2022-11-03 01:46:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:22,069 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 939 transitions. [2022-11-03 01:46:22,070 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 939 transitions. [2022-11-03 01:46:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 01:46:22,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:22,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:46:22,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:22,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:22,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash 33674215, now seen corresponding path program 1 times [2022-11-03 01:46:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:22,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344631533] [2022-11-03 01:46:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:22,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:22,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:22,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:22,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:46:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:22,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:46:23,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:23,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:23,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344631533] [2022-11-03 01:46:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344631533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:23,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:23,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721593480] [2022-11-03 01:46:23,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:23,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:23,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:23,043 INFO L87 Difference]: Start difference. First operand 568 states and 939 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:23,146 INFO L93 Difference]: Finished difference Result 1131 states and 1875 transitions. [2022-11-03 01:46:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:46:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2022-11-03 01:46:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:23,153 INFO L225 Difference]: With dead ends: 1131 [2022-11-03 01:46:23,153 INFO L226 Difference]: Without dead ends: 574 [2022-11-03 01:46:23,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 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 01:46:23,157 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 13 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:23,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2774 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-03 01:46:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-11-03 01:46:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6726057906458798) internal successors, (751), 468 states have internal predecessors, (751), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 944 transitions. [2022-11-03 01:46:23,187 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 944 transitions. Word has length 131 [2022-11-03 01:46:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:23,188 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 944 transitions. [2022-11-03 01:46:23,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 944 transitions. [2022-11-03 01:46:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 01:46:23,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:23,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:23,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 01:46:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:23,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1047710980, now seen corresponding path program 1 times [2022-11-03 01:46:23,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:23,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283712186] [2022-11-03 01:46:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:23,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:23,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:23,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:23,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:46:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:24,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:24,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:46:24,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:24,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:24,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283712186] [2022-11-03 01:46:24,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283712186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:24,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:24,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854081634] [2022-11-03 01:46:24,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:24,054 INFO L87 Difference]: Start difference. First operand 574 states and 944 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:24,156 INFO L93 Difference]: Finished difference Result 1130 states and 1866 transitions. [2022-11-03 01:46:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2022-11-03 01:46:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:24,162 INFO L225 Difference]: With dead ends: 1130 [2022-11-03 01:46:24,163 INFO L226 Difference]: Without dead ends: 574 [2022-11-03 01:46:24,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 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 01:46:24,167 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2775 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 01:46:24,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2775 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-03 01:46:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-11-03 01:46:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.670378619153675) internal successors, (750), 468 states have internal predecessors, (750), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 943 transitions. [2022-11-03 01:46:24,202 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 943 transitions. Word has length 132 [2022-11-03 01:46:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:24,203 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 943 transitions. [2022-11-03 01:46:24,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 943 transitions. [2022-11-03 01:46:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 01:46:24,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:24,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:24,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:24,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:24,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1025925749, now seen corresponding path program 1 times [2022-11-03 01:46:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:24,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114500915] [2022-11-03 01:46:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:24,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:24,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:24,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:24,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:46:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:46:25,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:25,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114500915] [2022-11-03 01:46:25,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114500915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:25,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:25,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949280122] [2022-11-03 01:46:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:25,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:25,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:25,038 INFO L87 Difference]: Start difference. First operand 574 states and 943 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:25,138 INFO L93 Difference]: Finished difference Result 1130 states and 1865 transitions. [2022-11-03 01:46:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2022-11-03 01:46:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:25,146 INFO L225 Difference]: With dead ends: 1130 [2022-11-03 01:46:25,146 INFO L226 Difference]: Without dead ends: 574 [2022-11-03 01:46:25,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 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 01:46:25,151 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 6 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2775 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 01:46:25,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2775 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-03 01:46:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-11-03 01:46:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6681514476614698) internal successors, (749), 468 states have internal predecessors, (749), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 942 transitions. [2022-11-03 01:46:25,187 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 942 transitions. Word has length 133 [2022-11-03 01:46:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:25,188 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 942 transitions. [2022-11-03 01:46:25,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 942 transitions. [2022-11-03 01:46:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:46:25,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:25,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:25,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 01:46:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:25,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -33192984, now seen corresponding path program 1 times [2022-11-03 01:46:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:25,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473521777] [2022-11-03 01:46:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:25,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:25,426 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:25,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:46:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:46:25,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:26,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:26,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:26,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473521777] [2022-11-03 01:46:26,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473521777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:26,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:26,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:46:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051382593] [2022-11-03 01:46:26,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:26,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:46:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:46:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:46:26,098 INFO L87 Difference]: Start difference. First operand 574 states and 942 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:26,348 INFO L93 Difference]: Finished difference Result 1147 states and 1893 transitions. [2022-11-03 01:46:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:46:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2022-11-03 01:46:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:26,363 INFO L225 Difference]: With dead ends: 1147 [2022-11-03 01:46:26,363 INFO L226 Difference]: Without dead ends: 595 [2022-11-03 01:46:26,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 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 01:46:26,369 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 148 mSDsluCounter, 4519 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5445 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:26,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 5445 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-11-03 01:46:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-11-03 01:46:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 465 states have (on average 1.6666666666666667) internal successors, (775), 486 states have internal predecessors, (775), 100 states have call successors, (100), 26 states have call predecessors, (100), 27 states have return successors, (98), 93 states have call predecessors, (98), 95 states have call successors, (98) [2022-11-03 01:46:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 973 transitions. [2022-11-03 01:46:26,419 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 973 transitions. Word has length 134 [2022-11-03 01:46:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:26,420 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 973 transitions. [2022-11-03 01:46:26,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 973 transitions. [2022-11-03 01:46:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:46:26,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:26,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:26,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:26,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:26,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1253289321, now seen corresponding path program 1 times [2022-11-03 01:46:26,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:26,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954936718] [2022-11-03 01:46:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:26,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:46:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:27,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:46:27,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:27,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954936718] [2022-11-03 01:46:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954936718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:27,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:27,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590290996] [2022-11-03 01:46:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:27,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:27,247 INFO L87 Difference]: Start difference. First operand 593 states and 973 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:27,337 INFO L93 Difference]: Finished difference Result 1160 states and 1915 transitions. [2022-11-03 01:46:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:46:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2022-11-03 01:46:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:27,344 INFO L225 Difference]: With dead ends: 1160 [2022-11-03 01:46:27,345 INFO L226 Difference]: Without dead ends: 589 [2022-11-03 01:46:27,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 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 01:46:27,349 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:27,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2774 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:46:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-03 01:46:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2022-11-03 01:46:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.6673866090712743) internal successors, (772), 483 states have internal predecessors, (772), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2022-11-03 01:46:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 966 transitions. [2022-11-03 01:46:27,381 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 966 transitions. Word has length 134 [2022-11-03 01:46:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:27,382 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 966 transitions. [2022-11-03 01:46:27,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 966 transitions. [2022-11-03 01:46:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 01:46:27,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:27,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:27,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:27,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:27,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1916228868, now seen corresponding path program 1 times [2022-11-03 01:46:27,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:27,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332749978] [2022-11-03 01:46:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:27,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:27,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:27,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:46:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:28,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:28,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:28,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332749978] [2022-11-03 01:46:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332749978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:28,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:28,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:28,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555705086] [2022-11-03 01:46:28,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:28,281 INFO L87 Difference]: Start difference. First operand 589 states and 966 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:28,528 INFO L93 Difference]: Finished difference Result 1186 states and 1960 transitions. [2022-11-03 01:46:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2022-11-03 01:46:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:28,536 INFO L225 Difference]: With dead ends: 1186 [2022-11-03 01:46:28,537 INFO L226 Difference]: Without dead ends: 589 [2022-11-03 01:46:28,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 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 01:46:28,541 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 134 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2582 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-03 01:46:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2022-11-03 01:46:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.65658747300216) internal successors, (767), 483 states have internal predecessors, (767), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2022-11-03 01:46:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 961 transitions. [2022-11-03 01:46:28,572 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 961 transitions. Word has length 135 [2022-11-03 01:46:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:28,573 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 961 transitions. [2022-11-03 01:46:28,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 961 transitions. [2022-11-03 01:46:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 01:46:28,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:28,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:28,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:28,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:28,799 INFO L85 PathProgramCache]: Analyzing trace with hash -693688392, now seen corresponding path program 1 times [2022-11-03 01:46:28,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:28,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182594923] [2022-11-03 01:46:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:28,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:28,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:28,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:46:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:29,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:29,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182594923] [2022-11-03 01:46:29,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182594923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:29,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:29,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110452235] [2022-11-03 01:46:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:29,392 INFO L87 Difference]: Start difference. First operand 589 states and 961 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:29,659 INFO L93 Difference]: Finished difference Result 1186 states and 1950 transitions. [2022-11-03 01:46:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2022-11-03 01:46:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:29,667 INFO L225 Difference]: With dead ends: 1186 [2022-11-03 01:46:29,667 INFO L226 Difference]: Without dead ends: 589 [2022-11-03 01:46:29,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 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 01:46:29,671 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 128 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:29,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2582 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-03 01:46:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2022-11-03 01:46:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.6457883369330453) internal successors, (762), 483 states have internal predecessors, (762), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2022-11-03 01:46:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 956 transitions. [2022-11-03 01:46:29,705 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 956 transitions. Word has length 137 [2022-11-03 01:46:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:29,706 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 956 transitions. [2022-11-03 01:46:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 956 transitions. [2022-11-03 01:46:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 01:46:29,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:29,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:29,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:29,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:29,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash 875821148, now seen corresponding path program 1 times [2022-11-03 01:46:29,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:29,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256258804] [2022-11-03 01:46:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:29,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:29,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:29,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:46:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:30,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:30,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:30,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256258804] [2022-11-03 01:46:30,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256258804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:30,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:30,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:30,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729308556] [2022-11-03 01:46:30,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:30,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:30,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:30,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:30,533 INFO L87 Difference]: Start difference. First operand 589 states and 956 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:30,768 INFO L93 Difference]: Finished difference Result 1207 states and 1971 transitions. [2022-11-03 01:46:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:46:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2022-11-03 01:46:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:30,776 INFO L225 Difference]: With dead ends: 1207 [2022-11-03 01:46:30,776 INFO L226 Difference]: Without dead ends: 619 [2022-11-03 01:46:30,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 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 01:46:30,780 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 143 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:30,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2592 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-03 01:46:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2022-11-03 01:46:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 478 states have (on average 1.6255230125523012) internal successors, (777), 497 states have internal predecessors, (777), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 970 transitions. [2022-11-03 01:46:30,809 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 970 transitions. Word has length 139 [2022-11-03 01:46:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:30,809 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 970 transitions. [2022-11-03 01:46:30,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 970 transitions. [2022-11-03 01:46:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 01:46:30,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:30,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:30,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:31,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:31,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1483641892, now seen corresponding path program 1 times [2022-11-03 01:46:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:31,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454804761] [2022-11-03 01:46:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:31,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:31,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:31,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:46:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:46:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:31,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:31,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:31,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454804761] [2022-11-03 01:46:31,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454804761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:31,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:31,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:46:31,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563127724] [2022-11-03 01:46:31,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:31,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:46:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:46:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:46:31,758 INFO L87 Difference]: Start difference. First operand 604 states and 970 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:31,962 INFO L93 Difference]: Finished difference Result 1171 states and 1892 transitions. [2022-11-03 01:46:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:46:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2022-11-03 01:46:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:31,971 INFO L225 Difference]: With dead ends: 1171 [2022-11-03 01:46:31,972 INFO L226 Difference]: Without dead ends: 598 [2022-11-03 01:46:31,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 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 01:46:31,978 INFO L413 NwaCegarLoop]: 929 mSDtfsCounter, 131 mSDsluCounter, 4484 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5413 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 01:46:31,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 5413 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-03 01:46:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 583. [2022-11-03 01:46:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6192560175054704) internal successors, (740), 476 states have internal predecessors, (740), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 933 transitions. [2022-11-03 01:46:32,010 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 933 transitions. Word has length 139 [2022-11-03 01:46:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:32,011 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 933 transitions. [2022-11-03 01:46:32,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 933 transitions. [2022-11-03 01:46:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 01:46:32,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:32,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:32,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:32,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2020187941, now seen corresponding path program 1 times [2022-11-03 01:46:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:32,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733189184] [2022-11-03 01:46:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:32,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:32,233 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:32,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:46:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:32,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:32,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733189184] [2022-11-03 01:46:32,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733189184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:32,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:32,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:32,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182024163] [2022-11-03 01:46:32,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:32,796 INFO L87 Difference]: Start difference. First operand 583 states and 933 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:32,942 INFO L93 Difference]: Finished difference Result 1135 states and 1830 transitions. [2022-11-03 01:46:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2022-11-03 01:46:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:32,949 INFO L225 Difference]: With dead ends: 1135 [2022-11-03 01:46:32,949 INFO L226 Difference]: Without dead ends: 583 [2022-11-03 01:46:32,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 01:46:32,954 INFO L413 NwaCegarLoop]: 898 mSDtfsCounter, 69 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:32,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2606 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-03 01:46:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-11-03 01:46:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6170678336980306) internal successors, (739), 476 states have internal predecessors, (739), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 932 transitions. [2022-11-03 01:46:32,980 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 932 transitions. Word has length 140 [2022-11-03 01:46:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:32,981 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 932 transitions. [2022-11-03 01:46:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 932 transitions. [2022-11-03 01:46:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 01:46:32,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:32,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:33,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:33,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash 19243735, now seen corresponding path program 1 times [2022-11-03 01:46:33,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:33,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573140995] [2022-11-03 01:46:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:33,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:33,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:33,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:46:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:33,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:46:33,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:33,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:33,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573140995] [2022-11-03 01:46:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573140995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:33,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:33,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281703860] [2022-11-03 01:46:33,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:33,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:33,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:46:33,802 INFO L87 Difference]: Start difference. First operand 583 states and 932 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:33,938 INFO L93 Difference]: Finished difference Result 1135 states and 1829 transitions. [2022-11-03 01:46:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2022-11-03 01:46:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:33,945 INFO L225 Difference]: With dead ends: 1135 [2022-11-03 01:46:33,945 INFO L226 Difference]: Without dead ends: 583 [2022-11-03 01:46:33,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 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 01:46:33,949 INFO L413 NwaCegarLoop]: 898 mSDtfsCounter, 67 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:33,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2606 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-03 01:46:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-11-03 01:46:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6148796498905909) internal successors, (738), 476 states have internal predecessors, (738), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 931 transitions. [2022-11-03 01:46:33,972 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 931 transitions. Word has length 141 [2022-11-03 01:46:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:33,973 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 931 transitions. [2022-11-03 01:46:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:46:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 931 transitions. [2022-11-03 01:46:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 01:46:33,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:33,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:34,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:34,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:34,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -702093632, now seen corresponding path program 1 times [2022-11-03 01:46:34,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:34,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146290425] [2022-11-03 01:46:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:34,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:34,196 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:34,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:46:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:46:34,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:34,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:34,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146290425] [2022-11-03 01:46:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146290425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:34,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:34,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:46:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353334493] [2022-11-03 01:46:34,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:34,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:46:34,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:46:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:46:34,925 INFO L87 Difference]: Start difference. First operand 583 states and 931 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:35,253 INFO L93 Difference]: Finished difference Result 1140 states and 1836 transitions. [2022-11-03 01:46:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:46:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2022-11-03 01:46:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:35,259 INFO L225 Difference]: With dead ends: 1140 [2022-11-03 01:46:35,260 INFO L226 Difference]: Without dead ends: 594 [2022-11-03 01:46:35,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 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 01:46:35,266 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 109 mSDsluCounter, 5170 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6043 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 01:46:35,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6043 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-03 01:46:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 585. [2022-11-03 01:46:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 459 states have (on average 1.6100217864923747) internal successors, (739), 478 states have internal predecessors, (739), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 932 transitions. [2022-11-03 01:46:35,292 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 932 transitions. Word has length 142 [2022-11-03 01:46:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:35,293 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 932 transitions. [2022-11-03 01:46:35,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 932 transitions. [2022-11-03 01:46:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:46:35,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:35,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:35,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:35,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:35,522 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:35,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -692040062, now seen corresponding path program 1 times [2022-11-03 01:46:35,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:35,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59976230] [2022-11-03 01:46:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:35,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:35,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:35,525 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:46:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:46:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:46:36,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:36,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59976230] [2022-11-03 01:46:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59976230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:36,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:46:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291782611] [2022-11-03 01:46:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:46:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:46:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:46:36,235 INFO L87 Difference]: Start difference. First operand 585 states and 932 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:36,537 INFO L93 Difference]: Finished difference Result 1132 states and 1817 transitions. [2022-11-03 01:46:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:46:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2022-11-03 01:46:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:36,550 INFO L225 Difference]: With dead ends: 1132 [2022-11-03 01:46:36,550 INFO L226 Difference]: Without dead ends: 590 [2022-11-03 01:46:36,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 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 01:46:36,555 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 77 mSDsluCounter, 5176 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6051 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 01:46:36,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 6051 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-03 01:46:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 587. [2022-11-03 01:46:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 461 states have (on average 1.6052060737527114) internal successors, (740), 480 states have internal predecessors, (740), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 933 transitions. [2022-11-03 01:46:36,583 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 933 transitions. Word has length 143 [2022-11-03 01:46:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:36,583 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 933 transitions. [2022-11-03 01:46:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 933 transitions. [2022-11-03 01:46:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 01:46:36,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:36,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:36,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:36,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:36,806 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1806094774, now seen corresponding path program 1 times [2022-11-03 01:46:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586219408] [2022-11-03 01:46:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:36,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:36,809 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:36,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:46:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:37,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:46:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:37,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:37,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:37,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586219408] [2022-11-03 01:46:37,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586219408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:37,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:37,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:46:37,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711302559] [2022-11-03 01:46:37,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:46:37,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:46:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:46:37,453 INFO L87 Difference]: Start difference. First operand 587 states and 933 transitions. Second operand has 7 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:37,649 INFO L93 Difference]: Finished difference Result 1078 states and 1744 transitions. [2022-11-03 01:46:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:46:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 144 [2022-11-03 01:46:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:37,656 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 01:46:37,656 INFO L226 Difference]: Without dead ends: 580 [2022-11-03 01:46:37,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 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 01:46:37,662 INFO L413 NwaCegarLoop]: 887 mSDtfsCounter, 55 mSDsluCounter, 4364 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5251 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:37,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 5251 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-03 01:46:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-11-03 01:46:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6123348017621146) internal successors, (732), 473 states have internal predecessors, (732), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 925 transitions. [2022-11-03 01:46:37,687 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 925 transitions. Word has length 144 [2022-11-03 01:46:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:37,688 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 925 transitions. [2022-11-03 01:46:37,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 925 transitions. [2022-11-03 01:46:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:46:37,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:37,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:37,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:37,910 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -396347874, now seen corresponding path program 1 times [2022-11-03 01:46:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:37,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617694908] [2022-11-03 01:46:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:37,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:37,912 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:37,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:46:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:46:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:38,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:38,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617694908] [2022-11-03 01:46:38,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617694908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:38,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:38,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:46:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985622467] [2022-11-03 01:46:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:46:38,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:46:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:46:38,516 INFO L87 Difference]: Start difference. First operand 580 states and 925 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:38,715 INFO L93 Difference]: Finished difference Result 1083 states and 1758 transitions. [2022-11-03 01:46:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:46:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 145 [2022-11-03 01:46:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:38,722 INFO L225 Difference]: With dead ends: 1083 [2022-11-03 01:46:38,722 INFO L226 Difference]: Without dead ends: 577 [2022-11-03 01:46:38,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 01:46:38,726 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 97 mSDsluCounter, 4332 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 5211 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:38,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 5211 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-03 01:46:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-11-03 01:46:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6119733924611974) internal successors, (727), 470 states have internal predecessors, (727), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 920 transitions. [2022-11-03 01:46:38,752 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 920 transitions. Word has length 145 [2022-11-03 01:46:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:38,753 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 920 transitions. [2022-11-03 01:46:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 920 transitions. [2022-11-03 01:46:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 01:46:38,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:38,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:38,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:38,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:38,978 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:38,978 INFO L85 PathProgramCache]: Analyzing trace with hash 598987422, now seen corresponding path program 1 times [2022-11-03 01:46:38,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:38,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782259816] [2022-11-03 01:46:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:38,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:38,981 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:39,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:46:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:46:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:39,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:39,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782259816] [2022-11-03 01:46:39,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782259816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:39,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:39,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:46:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337320313] [2022-11-03 01:46:39,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:46:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:46:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:46:39,553 INFO L87 Difference]: Start difference. First operand 577 states and 920 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:39,734 INFO L93 Difference]: Finished difference Result 1080 states and 1753 transitions. [2022-11-03 01:46:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:46:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 145 [2022-11-03 01:46:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:39,740 INFO L225 Difference]: With dead ends: 1080 [2022-11-03 01:46:39,740 INFO L226 Difference]: Without dead ends: 569 [2022-11-03 01:46:39,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 01:46:39,743 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 105 mSDsluCounter, 4323 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5201 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:39,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 5201 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-03 01:46:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-11-03 01:46:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 443 states have (on average 1.6162528216704288) internal successors, (716), 462 states have internal predecessors, (716), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 909 transitions. [2022-11-03 01:46:39,768 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 909 transitions. Word has length 145 [2022-11-03 01:46:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:39,769 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 909 transitions. [2022-11-03 01:46:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 909 transitions. [2022-11-03 01:46:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 01:46:39,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:39,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:39,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:39,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:39,998 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1606904338, now seen corresponding path program 1 times [2022-11-03 01:46:39,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:39,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007088087] [2022-11-03 01:46:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:40,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:40,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:40,001 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:40,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:46:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:46:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:40,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:40,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007088087] [2022-11-03 01:46:40,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007088087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:40,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:40,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:46:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288599203] [2022-11-03 01:46:40,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:46:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:46:40,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:46:40,613 INFO L87 Difference]: Start difference. First operand 569 states and 909 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:40,834 INFO L93 Difference]: Finished difference Result 1066 states and 1731 transitions. [2022-11-03 01:46:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:46:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2022-11-03 01:46:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:40,841 INFO L225 Difference]: With dead ends: 1066 [2022-11-03 01:46:40,841 INFO L226 Difference]: Without dead ends: 569 [2022-11-03 01:46:40,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:46:40,846 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 67 mSDsluCounter, 5154 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6028 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:40,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6028 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:46:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-03 01:46:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-11-03 01:46:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 443 states have (on average 1.6139954853273137) internal successors, (715), 462 states have internal predecessors, (715), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 908 transitions. [2022-11-03 01:46:40,876 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 908 transitions. Word has length 146 [2022-11-03 01:46:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:40,876 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 908 transitions. [2022-11-03 01:46:40,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 908 transitions. [2022-11-03 01:46:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 01:46:40,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:40,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:40,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:41,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:41,106 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash 896794396, now seen corresponding path program 1 times [2022-11-03 01:46:41,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:41,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830953792] [2022-11-03 01:46:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:41,109 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:41,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:46:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:46:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:41,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:41,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830953792] [2022-11-03 01:46:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830953792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:41,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:41,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:46:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753173249] [2022-11-03 01:46:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:41,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:46:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:46:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:46:41,684 INFO L87 Difference]: Start difference. First operand 569 states and 908 transitions. Second operand has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:41,924 INFO L93 Difference]: Finished difference Result 1110 states and 1788 transitions. [2022-11-03 01:46:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:46:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 147 [2022-11-03 01:46:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:41,931 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 01:46:41,931 INFO L226 Difference]: Without dead ends: 566 [2022-11-03 01:46:41,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 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 01:46:41,935 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 101 mSDsluCounter, 5111 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 5973 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:41,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 5973 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-03 01:46:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2022-11-03 01:46:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 440 states have (on average 1.606818181818182) internal successors, (707), 459 states have internal predecessors, (707), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 900 transitions. [2022-11-03 01:46:41,959 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 900 transitions. Word has length 147 [2022-11-03 01:46:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:41,959 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 900 transitions. [2022-11-03 01:46:41,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 900 transitions. [2022-11-03 01:46:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 01:46:41,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:41,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:41,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:42,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:42,190 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash -549200077, now seen corresponding path program 1 times [2022-11-03 01:46:42,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715933387] [2022-11-03 01:46:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:42,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:42,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:42,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:42,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:46:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:46:42,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:42,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:42,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715933387] [2022-11-03 01:46:42,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715933387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:42,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:42,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:46:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925103051] [2022-11-03 01:46:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:42,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:46:42,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:46:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:46:42,808 INFO L87 Difference]: Start difference. First operand 566 states and 900 transitions. Second operand has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:43,063 INFO L93 Difference]: Finished difference Result 1057 states and 1711 transitions. [2022-11-03 01:46:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:46:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 148 [2022-11-03 01:46:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:43,072 INFO L225 Difference]: With dead ends: 1057 [2022-11-03 01:46:43,073 INFO L226 Difference]: Without dead ends: 566 [2022-11-03 01:46:43,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:46:43,079 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 50 mSDsluCounter, 5120 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5983 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:43,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 5983 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-03 01:46:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2022-11-03 01:46:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 440 states have (on average 1.6045454545454545) internal successors, (706), 459 states have internal predecessors, (706), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 899 transitions. [2022-11-03 01:46:43,105 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 899 transitions. Word has length 148 [2022-11-03 01:46:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:43,105 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 899 transitions. [2022-11-03 01:46:43,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 899 transitions. [2022-11-03 01:46:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 01:46:43,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:43,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:43,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:43,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:43,325 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1483735021, now seen corresponding path program 1 times [2022-11-03 01:46:43,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:43,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302622247] [2022-11-03 01:46:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:43,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:43,327 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:43,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:46:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:46:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:46:43,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:43,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:43,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302622247] [2022-11-03 01:46:43,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302622247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:43,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:43,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:46:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982985497] [2022-11-03 01:46:43,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:46:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:46:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:46:43,982 INFO L87 Difference]: Start difference. First operand 566 states and 899 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:44,229 INFO L93 Difference]: Finished difference Result 1095 states and 1756 transitions. [2022-11-03 01:46:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:46:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 149 [2022-11-03 01:46:44,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:44,235 INFO L225 Difference]: With dead ends: 1095 [2022-11-03 01:46:44,236 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 01:46:44,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 144 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 01:46:44,240 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 69 mSDsluCounter, 5106 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 5967 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:44,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 5967 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:46:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 01:46:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-11-03 01:46:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.597254004576659) internal successors, (698), 456 states have internal predecessors, (698), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:46:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 891 transitions. [2022-11-03 01:46:44,296 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 891 transitions. Word has length 149 [2022-11-03 01:46:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:44,297 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 891 transitions. [2022-11-03 01:46:44,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 891 transitions. [2022-11-03 01:46:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 01:46:44,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:44,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:44,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:44,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:44,527 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1244870456, now seen corresponding path program 1 times [2022-11-03 01:46:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:44,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844042294] [2022-11-03 01:46:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:44,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:44,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:44,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:46:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:46:45,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:45,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:45,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844042294] [2022-11-03 01:46:45,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844042294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:45,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:45,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:45,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312923823] [2022-11-03 01:46:45,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:45,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:46:45,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:46:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:46:45,309 INFO L87 Difference]: Start difference. First operand 563 states and 891 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:46,405 INFO L93 Difference]: Finished difference Result 1050 states and 1720 transitions. [2022-11-03 01:46:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:46:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2022-11-03 01:46:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:46,410 INFO L225 Difference]: With dead ends: 1050 [2022-11-03 01:46:46,410 INFO L226 Difference]: Without dead ends: 567 [2022-11-03 01:46:46,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 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 01:46:46,425 INFO L413 NwaCegarLoop]: 848 mSDtfsCounter, 804 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:46,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 2187 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:46:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-03 01:46:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-11-03 01:46:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 440 states have (on average 1.5931818181818183) internal successors, (701), 459 states have internal predecessors, (701), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2022-11-03 01:46:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 895 transitions. [2022-11-03 01:46:46,491 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 895 transitions. Word has length 150 [2022-11-03 01:46:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:46,492 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 895 transitions. [2022-11-03 01:46:46,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 895 transitions. [2022-11-03 01:46:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 01:46:46,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:46,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:46,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:46,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:46,722 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1610470090, now seen corresponding path program 1 times [2022-11-03 01:46:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:46,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661518203] [2022-11-03 01:46:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:46,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:46,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:46,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:46,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:46:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:46:47,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:47,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661518203] [2022-11-03 01:46:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661518203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:47,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:47,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111980303] [2022-11-03 01:46:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:47,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:46:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:46:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:46:47,522 INFO L87 Difference]: Start difference. First operand 567 states and 895 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:48,604 INFO L93 Difference]: Finished difference Result 1059 states and 1727 transitions. [2022-11-03 01:46:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:46:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2022-11-03 01:46:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:48,611 INFO L225 Difference]: With dead ends: 1059 [2022-11-03 01:46:48,611 INFO L226 Difference]: Without dead ends: 572 [2022-11-03 01:46:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 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 01:46:48,623 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 795 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:48,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 2188 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:46:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-03 01:46:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2022-11-03 01:46:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 444 states have (on average 1.587837837837838) internal successors, (705), 463 states have internal predecessors, (705), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2022-11-03 01:46:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 900 transitions. [2022-11-03 01:46:48,687 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 900 transitions. Word has length 152 [2022-11-03 01:46:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:48,688 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 900 transitions. [2022-11-03 01:46:48,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 900 transitions. [2022-11-03 01:46:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 01:46:48,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:48,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:48,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:48,921 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1349907192, now seen corresponding path program 1 times [2022-11-03 01:46:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:48,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501564399] [2022-11-03 01:46:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:48,924 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:48,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:46:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:46:49,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:49,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:49,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501564399] [2022-11-03 01:46:49,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501564399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:49,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491664729] [2022-11-03 01:46:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:49,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:46:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:46:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:46:49,629 INFO L87 Difference]: Start difference. First operand 572 states and 900 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:50,592 INFO L93 Difference]: Finished difference Result 1070 states and 1736 transitions. [2022-11-03 01:46:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:46:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2022-11-03 01:46:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:50,596 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 01:46:50,596 INFO L226 Difference]: Without dead ends: 578 [2022-11-03 01:46:50,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 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 01:46:50,599 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 805 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:50,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 2188 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:46:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-03 01:46:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2022-11-03 01:46:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.581291759465479) internal successors, (710), 468 states have internal predecessors, (710), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2022-11-03 01:46:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 906 transitions. [2022-11-03 01:46:50,630 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 906 transitions. Word has length 154 [2022-11-03 01:46:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:50,630 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 906 transitions. [2022-11-03 01:46:50,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 906 transitions. [2022-11-03 01:46:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:46:50,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:50,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:50,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 01:46:50,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:50,850 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -318794002, now seen corresponding path program 1 times [2022-11-03 01:46:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:50,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410448768] [2022-11-03 01:46:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:50,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:50,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:50,853 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:50,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:46:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:46:51,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:51,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410448768] [2022-11-03 01:46:51,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410448768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:51,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:51,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:51,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070155014] [2022-11-03 01:46:51,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:46:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:46:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:46:51,568 INFO L87 Difference]: Start difference. First operand 578 states and 906 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:52,523 INFO L93 Difference]: Finished difference Result 1083 states and 1747 transitions. [2022-11-03 01:46:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:46:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2022-11-03 01:46:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:52,527 INFO L225 Difference]: With dead ends: 1083 [2022-11-03 01:46:52,527 INFO L226 Difference]: Without dead ends: 585 [2022-11-03 01:46:52,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 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 01:46:52,531 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 805 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:52,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 2188 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:46:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-03 01:46:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2022-11-03 01:46:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.5736263736263736) internal successors, (716), 474 states have internal predecessors, (716), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2022-11-03 01:46:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 913 transitions. [2022-11-03 01:46:52,561 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 913 transitions. Word has length 156 [2022-11-03 01:46:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:52,561 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 913 transitions. [2022-11-03 01:46:52,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 913 transitions. [2022-11-03 01:46:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 01:46:52,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:52,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:52,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 01:46:52,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:52,788 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash 604279128, now seen corresponding path program 1 times [2022-11-03 01:46:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:52,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301544245] [2022-11-03 01:46:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:52,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:52,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:52,790 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:52,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:46:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:46:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:46:53,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:53,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301544245] [2022-11-03 01:46:53,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301544245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:53,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:46:53,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:46:53,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845304806] [2022-11-03 01:46:53,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:53,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:46:53,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:53,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:46:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:46:53,566 INFO L87 Difference]: Start difference. First operand 585 states and 913 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:54,533 INFO L93 Difference]: Finished difference Result 1092 states and 1749 transitions. [2022-11-03 01:46:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:46:54,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 158 [2022-11-03 01:46:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:54,539 INFO L225 Difference]: With dead ends: 1092 [2022-11-03 01:46:54,539 INFO L226 Difference]: Without dead ends: 587 [2022-11-03 01:46:54,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 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 01:46:54,543 INFO L413 NwaCegarLoop]: 848 mSDtfsCounter, 786 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:54,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 2187 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:46:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-03 01:46:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-11-03 01:46:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 456 states have (on average 1.5723684210526316) internal successors, (717), 476 states have internal predecessors, (717), 99 states have call successors, (99), 31 states have call predecessors, (99), 31 states have return successors, (99), 92 states have call predecessors, (99), 94 states have call successors, (99) [2022-11-03 01:46:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 915 transitions. [2022-11-03 01:46:54,571 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 915 transitions. Word has length 158 [2022-11-03 01:46:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:54,572 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 915 transitions. [2022-11-03 01:46:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:46:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 915 transitions. [2022-11-03 01:46:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 01:46:54,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:54,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:54,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:54,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:46:54,800 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1551819592, now seen corresponding path program 1 times [2022-11-03 01:46:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:54,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368531817] [2022-11-03 01:46:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:54,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:54,803 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:54,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:46:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:46:55,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:46:55,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:46:57,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:57,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368531817] [2022-11-03 01:46:57,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368531817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:57,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [527640035] [2022-11-03 01:46:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:57,020 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:57,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 01:46:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:46:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 01:46:57,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:46:57,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [527640035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:46:57,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:46:57,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 10] total 20 [2022-11-03 01:46:57,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919771944] [2022-11-03 01:46:57,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:46:57,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:46:57,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:46:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:46:57,901 INFO L87 Difference]: Start difference. First operand 587 states and 915 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:58,757 INFO L93 Difference]: Finished difference Result 1090 states and 1737 transitions. [2022-11-03 01:46:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:46:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 158 [2022-11-03 01:46:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:58,763 INFO L225 Difference]: With dead ends: 1090 [2022-11-03 01:46:58,763 INFO L226 Difference]: Without dead ends: 583 [2022-11-03 01:46:58,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:46:58,768 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 1289 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:58,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 789 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:46:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-03 01:46:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-11-03 01:46:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.5682819383259912) internal successors, (712), 473 states have internal predecessors, (712), 97 states have call successors, (97), 31 states have call predecessors, (97), 31 states have return successors, (98), 91 states have call predecessors, (98), 93 states have call successors, (98) [2022-11-03 01:46:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 907 transitions. [2022-11-03 01:46:58,813 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 907 transitions. Word has length 158 [2022-11-03 01:46:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:58,814 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 907 transitions. [2022-11-03 01:46:58,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:46:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 907 transitions. [2022-11-03 01:46:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 01:46:58,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:58,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:58,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:59,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-03 01:46:59,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:59,238 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash -861911061, now seen corresponding path program 1 times [2022-11-03 01:46:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:59,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656740327] [2022-11-03 01:46:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:59,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:59,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:59,241 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:59,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:46:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:59,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:46:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:47:00,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:47:01,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656740327] [2022-11-03 01:47:01,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656740327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:01,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1621869503] [2022-11-03 01:47:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:01,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:01,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:01,418 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:01,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 01:47:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:47:01,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:47:02,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:47:03,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1621869503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221038089] [2022-11-03 01:47:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:03,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:03,382 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:03,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 01:47:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:47:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:47:04,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:47:04,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221038089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:04,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:04,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2022-11-03 01:47:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853932949] [2022-11-03 01:47:04,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:04,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:47:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:47:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:47:04,999 INFO L87 Difference]: Start difference. First operand 583 states and 907 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-03 01:47:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:15,222 INFO L93 Difference]: Finished difference Result 1709 states and 2750 transitions. [2022-11-03 01:47:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:47:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2022-11-03 01:47:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:15,233 INFO L225 Difference]: With dead ends: 1709 [2022-11-03 01:47:15,233 INFO L226 Difference]: Without dead ends: 1206 [2022-11-03 01:47:15,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:47:15,238 INFO L413 NwaCegarLoop]: 1628 mSDtfsCounter, 6836 mSDsluCounter, 3700 mSDsCounter, 0 mSdLazyCounter, 7283 mSolverCounterSat, 2151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6861 SdHoareTripleChecker+Valid, 5328 SdHoareTripleChecker+Invalid, 9434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2151 IncrementalHoareTripleChecker+Valid, 7283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:15,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6861 Valid, 5328 Invalid, 9434 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2151 Valid, 7283 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 01:47:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2022-11-03 01:47:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1192. [2022-11-03 01:47:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 908 states have (on average 1.592511013215859) internal successors, (1446), 949 states have internal predecessors, (1446), 222 states have call successors, (222), 55 states have call predecessors, (222), 61 states have return successors, (240), 218 states have call predecessors, (240), 218 states have call successors, (240) [2022-11-03 01:47:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1908 transitions. [2022-11-03 01:47:15,362 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1908 transitions. Word has length 159 [2022-11-03 01:47:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:15,362 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1908 transitions. [2022-11-03 01:47:15,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-03 01:47:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1908 transitions. [2022-11-03 01:47:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 01:47:15,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:15,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:15,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-03 01:47:15,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 01:47:15,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-03 01:47:15,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:15,981 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1378524794, now seen corresponding path program 1 times [2022-11-03 01:47:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:15,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402288768] [2022-11-03 01:47:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:15,985 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:15,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:47:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:47:16,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:47:16,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:16,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402288768] [2022-11-03 01:47:16,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402288768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:16,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:16,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:47:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327003687] [2022-11-03 01:47:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:16,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:47:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:47:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:47:16,580 INFO L87 Difference]: Start difference. First operand 1192 states and 1908 transitions. Second operand has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:47:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:16,875 INFO L93 Difference]: Finished difference Result 1698 states and 2726 transitions. [2022-11-03 01:47:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:47:16,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 161 [2022-11-03 01:47:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:16,884 INFO L225 Difference]: With dead ends: 1698 [2022-11-03 01:47:16,884 INFO L226 Difference]: Without dead ends: 576 [2022-11-03 01:47:16,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 157 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 01:47:16,892 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 69 mSDsluCounter, 5004 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 5848 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:16,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 5848 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-11-03 01:47:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2022-11-03 01:47:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 449 states have (on average 1.5634743875278396) internal successors, (702), 468 states have internal predecessors, (702), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (96), 89 states have call predecessors, (96), 91 states have call successors, (96) [2022-11-03 01:47:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 893 transitions. [2022-11-03 01:47:16,956 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 893 transitions. Word has length 161 [2022-11-03 01:47:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:16,957 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 893 transitions. [2022-11-03 01:47:16,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:47:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 893 transitions. [2022-11-03 01:47:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-03 01:47:16,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:16,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:16,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:17,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:17,186 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:17,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1629577450, now seen corresponding path program 1 times [2022-11-03 01:47:17,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022432520] [2022-11-03 01:47:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:17,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:17,189 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:47:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:47:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:47:18,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:47:19,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022432520] [2022-11-03 01:47:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022432520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71079921] [2022-11-03 01:47:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:19,046 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:19,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:47:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:47:19,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:47:19,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:47:20,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71079921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879751272] [2022-11-03 01:47:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:20,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:20,665 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:20,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 01:47:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:20,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:47:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:47:21,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:47:22,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879751272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:22,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2022-11-03 01:47:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185217479] [2022-11-03 01:47:22,098 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:47:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:47:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:47:22,101 INFO L87 Difference]: Start difference. First operand 576 states and 893 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-03 01:47:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:25,511 INFO L93 Difference]: Finished difference Result 1078 states and 1710 transitions. [2022-11-03 01:47:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:47:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2022-11-03 01:47:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:25,517 INFO L225 Difference]: With dead ends: 1078 [2022-11-03 01:47:25,517 INFO L226 Difference]: Without dead ends: 580 [2022-11-03 01:47:25,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:47:25,520 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 1327 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:25,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 2265 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 01:47:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-03 01:47:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2022-11-03 01:47:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 451 states have (on average 1.5609756097560976) internal successors, (704), 469 states have internal predecessors, (704), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (96), 90 states have call predecessors, (96), 91 states have call successors, (96) [2022-11-03 01:47:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 895 transitions. [2022-11-03 01:47:25,559 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 895 transitions. Word has length 165 [2022-11-03 01:47:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:25,560 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 895 transitions. [2022-11-03 01:47:25,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-03 01:47:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 895 transitions. [2022-11-03 01:47:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 01:47:25,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:25,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:25,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 01:47:25,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 01:47:26,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 01:47:26,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:26,186 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1821259940, now seen corresponding path program 1 times [2022-11-03 01:47:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:26,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557306075] [2022-11-03 01:47:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:26,189 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:26,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:47:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:47:26,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:47:27,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:27,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557306075] [2022-11-03 01:47:27,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557306075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:27,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1557374682] [2022-11-03 01:47:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:27,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:27,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:27,492 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:27,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 01:47:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:47:28,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:47:28,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1557374682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:28,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457706279] [2022-11-03 01:47:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:28,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:28,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:28,696 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:28,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 01:47:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:47:29,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:47:29,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:47:29,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457706279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:29,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:29,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:47:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579389682] [2022-11-03 01:47:29,665 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:47:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:47:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:47:29,667 INFO L87 Difference]: Start difference. First operand 578 states and 895 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-03 01:47:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:36,950 INFO L93 Difference]: Finished difference Result 2071 states and 3327 transitions. [2022-11-03 01:47:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:47:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2022-11-03 01:47:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:36,961 INFO L225 Difference]: With dead ends: 2071 [2022-11-03 01:47:36,961 INFO L226 Difference]: Without dead ends: 1569 [2022-11-03 01:47:36,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:47:36,964 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 4021 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 4361 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 5513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 4361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:36,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4102 Valid, 3181 Invalid, 5513 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1152 Valid, 4361 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 01:47:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-11-03 01:47:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1513. [2022-11-03 01:47:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1173 states have (on average 1.5831202046035806) internal successors, (1857), 1218 states have internal predecessors, (1857), 259 states have call successors, (259), 80 states have call predecessors, (259), 80 states have return successors, (281), 251 states have call predecessors, (281), 255 states have call successors, (281) [2022-11-03 01:47:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2397 transitions. [2022-11-03 01:47:37,136 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2397 transitions. Word has length 166 [2022-11-03 01:47:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:37,140 INFO L495 AbstractCegarLoop]: Abstraction has 1513 states and 2397 transitions. [2022-11-03 01:47:37,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-03 01:47:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2397 transitions. [2022-11-03 01:47:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 01:47:37,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:37,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:37,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:47:37,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-03 01:47:37,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-03 01:47:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:37,754 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash 776281684, now seen corresponding path program 1 times [2022-11-03 01:47:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577632205] [2022-11-03 01:47:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:37,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:37,758 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:37,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:47:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:47:38,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:47:38,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:38,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577632205] [2022-11-03 01:47:38,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577632205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:38,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:38,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:47:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109774016] [2022-11-03 01:47:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:38,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:47:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:47:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:47:38,654 INFO L87 Difference]: Start difference. First operand 1513 states and 2397 transitions. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 6 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-03 01:47:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:46,570 INFO L93 Difference]: Finished difference Result 5035 states and 8259 transitions. [2022-11-03 01:47:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:47:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 6 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 168 [2022-11-03 01:47:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:46,603 INFO L225 Difference]: With dead ends: 5035 [2022-11-03 01:47:46,603 INFO L226 Difference]: Without dead ends: 3600 [2022-11-03 01:47:46,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:47:46,613 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 2170 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2300 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 5771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:46,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2300 Valid, 3522 Invalid, 5771 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [545 Valid, 5226 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 01:47:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2022-11-03 01:47:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3470. [2022-11-03 01:47:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 2576 states have (on average 1.5811335403726707) internal successors, (4073), 2717 states have internal predecessors, (4073), 728 states have call successors, (728), 152 states have call predecessors, (728), 165 states have return successors, (880), 722 states have call predecessors, (880), 724 states have call successors, (880) [2022-11-03 01:47:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5681 transitions. [2022-11-03 01:47:47,162 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5681 transitions. Word has length 168 [2022-11-03 01:47:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:47,162 INFO L495 AbstractCegarLoop]: Abstraction has 3470 states and 5681 transitions. [2022-11-03 01:47:47,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 6 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-03 01:47:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5681 transitions. [2022-11-03 01:47:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 01:47:47,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:47,178 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:47,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:47,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:47,387 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1398398413, now seen corresponding path program 1 times [2022-11-03 01:47:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43246746] [2022-11-03 01:47:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:47,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:47,390 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:47,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:47:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:47:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:47:48,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:48,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43246746] [2022-11-03 01:47:48,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43246746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:48,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:48,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:47:48,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957257346] [2022-11-03 01:47:48,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:48,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:47:48,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:47:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:47:48,230 INFO L87 Difference]: Start difference. First operand 3470 states and 5681 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:47:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:55,629 INFO L93 Difference]: Finished difference Result 9558 states and 15703 transitions. [2022-11-03 01:47:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:47:55,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 168 [2022-11-03 01:47:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:55,687 INFO L225 Difference]: With dead ends: 9558 [2022-11-03 01:47:55,688 INFO L226 Difference]: Without dead ends: 6985 [2022-11-03 01:47:55,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:47:55,705 INFO L413 NwaCegarLoop]: 1025 mSDtfsCounter, 2939 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 3815 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3013 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 3815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:55,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3013 Valid, 2658 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 3815 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 01:47:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6985 states. [2022-11-03 01:47:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6985 to 6719. [2022-11-03 01:47:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6719 states, 5021 states have (on average 1.5753833897629954) internal successors, (7910), 5285 states have internal predecessors, (7910), 1350 states have call successors, (1350), 290 states have call predecessors, (1350), 347 states have return successors, (1725), 1345 states have call predecessors, (1725), 1346 states have call successors, (1725) [2022-11-03 01:47:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6719 states to 6719 states and 10985 transitions. [2022-11-03 01:47:56,941 INFO L78 Accepts]: Start accepts. Automaton has 6719 states and 10985 transitions. Word has length 168 [2022-11-03 01:47:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:56,942 INFO L495 AbstractCegarLoop]: Abstraction has 6719 states and 10985 transitions. [2022-11-03 01:47:56,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 01:47:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6719 states and 10985 transitions. [2022-11-03 01:47:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-03 01:47:56,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:56,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:56,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:57,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:57,176 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:57,176 INFO L85 PathProgramCache]: Analyzing trace with hash 697507379, now seen corresponding path program 1 times [2022-11-03 01:47:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:57,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575640079] [2022-11-03 01:47:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:57,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:57,180 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:57,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:47:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:47:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:47:58,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:58,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575640079] [2022-11-03 01:47:58,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575640079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:58,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:58,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 01:47:58,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786827831] [2022-11-03 01:47:58,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:58,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:47:58,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:47:58,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:47:58,306 INFO L87 Difference]: Start difference. First operand 6719 states and 10985 transitions. Second operand has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 9 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 01:48:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:03,448 INFO L93 Difference]: Finished difference Result 12485 states and 20471 transitions. [2022-11-03 01:48:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:48:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 9 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) Word has length 170 [2022-11-03 01:48:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:03,497 INFO L225 Difference]: With dead ends: 12485 [2022-11-03 01:48:03,497 INFO L226 Difference]: Without dead ends: 6671 [2022-11-03 01:48:03,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:48:03,519 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 1412 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 3839 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 4202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 3839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:03,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 2854 Invalid, 4202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 3839 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 01:48:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2022-11-03 01:48:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 6671. [2022-11-03 01:48:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 4995 states have (on average 1.5755755755755756) internal successors, (7870), 5255 states have internal predecessors, (7870), 1336 states have call successors, (1336), 286 states have call predecessors, (1336), 339 states have return successors, (1703), 1331 states have call predecessors, (1703), 1332 states have call successors, (1703) [2022-11-03 01:48:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 10909 transitions. [2022-11-03 01:48:04,692 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 10909 transitions. Word has length 170 [2022-11-03 01:48:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:04,693 INFO L495 AbstractCegarLoop]: Abstraction has 6671 states and 10909 transitions. [2022-11-03 01:48:04,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 9 states have internal predecessors, (111), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 01:48:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 10909 transitions. [2022-11-03 01:48:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 01:48:04,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:04,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:04,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:04,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:04,912 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2058923736, now seen corresponding path program 1 times [2022-11-03 01:48:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:04,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727016883] [2022-11-03 01:48:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:04,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:04,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:04,915 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:04,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:48:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:05,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:48:05,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:48:05,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:05,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727016883] [2022-11-03 01:48:05,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727016883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:05,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:05,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:48:05,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041374781] [2022-11-03 01:48:05,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:05,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:48:05,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:05,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:48:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:48:05,961 INFO L87 Difference]: Start difference. First operand 6671 states and 10909 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 5 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:48:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:14,451 INFO L93 Difference]: Finished difference Result 13639 states and 22189 transitions. [2022-11-03 01:48:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:48:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 5 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 173 [2022-11-03 01:48:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:14,520 INFO L225 Difference]: With dead ends: 13639 [2022-11-03 01:48:14,520 INFO L226 Difference]: Without dead ends: 7831 [2022-11-03 01:48:14,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:48:14,552 INFO L413 NwaCegarLoop]: 947 mSDtfsCounter, 1984 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 5011 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2056 SdHoareTripleChecker+Valid, 3003 SdHoareTripleChecker+Invalid, 5508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 5011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:14,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2056 Valid, 3003 Invalid, 5508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 5011 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 01:48:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7831 states. [2022-11-03 01:48:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7831 to 7351. [2022-11-03 01:48:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 5499 states have (on average 1.5457355882887798) internal successors, (8500), 5789 states have internal predecessors, (8500), 1436 states have call successors, (1436), 350 states have call predecessors, (1436), 415 states have return successors, (1881), 1413 states have call predecessors, (1881), 1432 states have call successors, (1881) [2022-11-03 01:48:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 11817 transitions. [2022-11-03 01:48:15,666 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 11817 transitions. Word has length 173 [2022-11-03 01:48:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:15,669 INFO L495 AbstractCegarLoop]: Abstraction has 7351 states and 11817 transitions. [2022-11-03 01:48:15,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 5 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:48:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 11817 transitions. [2022-11-03 01:48:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-03 01:48:15,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:15,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:15,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:15,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:15,899 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1651518826, now seen corresponding path program 1 times [2022-11-03 01:48:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:15,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482961815] [2022-11-03 01:48:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:15,902 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:15,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:48:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:48:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:48:16,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:16,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:16,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482961815] [2022-11-03 01:48:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482961815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:16,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:16,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:48:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456989730] [2022-11-03 01:48:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:16,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:48:16,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:48:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:16,606 INFO L87 Difference]: Start difference. First operand 7351 states and 11817 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:48:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:17,761 INFO L93 Difference]: Finished difference Result 14357 states and 23237 transitions. [2022-11-03 01:48:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 180 [2022-11-03 01:48:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:17,899 INFO L225 Difference]: With dead ends: 14357 [2022-11-03 01:48:17,899 INFO L226 Difference]: Without dead ends: 7351 [2022-11-03 01:48:17,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:17,926 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 401 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 3087 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:17,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 3087 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2022-11-03 01:48:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7351. [2022-11-03 01:48:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 5499 states have (on average 1.5260956537552282) internal successors, (8392), 5789 states have internal predecessors, (8392), 1436 states have call successors, (1436), 350 states have call predecessors, (1436), 415 states have return successors, (1881), 1413 states have call predecessors, (1881), 1432 states have call successors, (1881) [2022-11-03 01:48:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 11709 transitions. [2022-11-03 01:48:19,173 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 11709 transitions. Word has length 180 [2022-11-03 01:48:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:19,174 INFO L495 AbstractCegarLoop]: Abstraction has 7351 states and 11709 transitions. [2022-11-03 01:48:19,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 01:48:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 11709 transitions. [2022-11-03 01:48:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-03 01:48:19,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:19,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:19,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:19,406 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -429316175, now seen corresponding path program 1 times [2022-11-03 01:48:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:19,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426363966] [2022-11-03 01:48:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:19,409 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:19,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:48:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:48:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-03 01:48:20,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:20,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:20,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426363966] [2022-11-03 01:48:20,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426363966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:20,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:20,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:48:20,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104243107] [2022-11-03 01:48:20,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:20,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:48:20,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:48:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:20,253 INFO L87 Difference]: Start difference. First operand 7351 states and 11709 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 01:48:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:25,899 INFO L93 Difference]: Finished difference Result 14352 states and 22929 transitions. [2022-11-03 01:48:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:48:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 185 [2022-11-03 01:48:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:25,954 INFO L225 Difference]: With dead ends: 14352 [2022-11-03 01:48:25,954 INFO L226 Difference]: Without dead ends: 8087 [2022-11-03 01:48:25,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:48:25,985 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 1973 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 3179 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 3657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 3179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:25,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2052 Valid, 2095 Invalid, 3657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 3179 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 01:48:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2022-11-03 01:48:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 7663. [2022-11-03 01:48:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7663 states, 5729 states have (on average 1.5150986210507942) internal successors, (8680), 6045 states have internal predecessors, (8680), 1462 states have call successors, (1462), 380 states have call predecessors, (1462), 471 states have return successors, (1977), 1439 states have call predecessors, (1977), 1458 states have call successors, (1977) [2022-11-03 01:48:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7663 states to 7663 states and 12119 transitions. [2022-11-03 01:48:27,012 INFO L78 Accepts]: Start accepts. Automaton has 7663 states and 12119 transitions. Word has length 185 [2022-11-03 01:48:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:27,013 INFO L495 AbstractCegarLoop]: Abstraction has 7663 states and 12119 transitions. [2022-11-03 01:48:27,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 5 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 01:48:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7663 states and 12119 transitions. [2022-11-03 01:48:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 01:48:27,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:27,019 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:27,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 01:48:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:27,247 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1129128741, now seen corresponding path program 1 times [2022-11-03 01:48:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839268220] [2022-11-03 01:48:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:27,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:27,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:27,253 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:27,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:48:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:48:27,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 01:48:28,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:28,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839268220] [2022-11-03 01:48:28,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839268220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:28,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:28,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:48:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208042121] [2022-11-03 01:48:28,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:48:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:48:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:48:28,153 INFO L87 Difference]: Start difference. First operand 7663 states and 12119 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 01:48:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:35,027 INFO L93 Difference]: Finished difference Result 14526 states and 23003 transitions. [2022-11-03 01:48:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:48:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 4 states have call successors, (19) Word has length 190 [2022-11-03 01:48:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:35,080 INFO L225 Difference]: With dead ends: 14526 [2022-11-03 01:48:35,080 INFO L226 Difference]: Without dead ends: 7948 [2022-11-03 01:48:35,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:48:35,111 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 1628 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 3953 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 3953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:35,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 2464 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 3953 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 01:48:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2022-11-03 01:48:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7530. [2022-11-03 01:48:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7530 states, 5628 states have (on average 1.5129708599857854) internal successors, (8515), 5937 states have internal predecessors, (8515), 1442 states have call successors, (1442), 380 states have call predecessors, (1442), 459 states have return successors, (1916), 1414 states have call predecessors, (1916), 1438 states have call successors, (1916) [2022-11-03 01:48:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 11873 transitions. [2022-11-03 01:48:36,680 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 11873 transitions. Word has length 190 [2022-11-03 01:48:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:36,681 INFO L495 AbstractCegarLoop]: Abstraction has 7530 states and 11873 transitions. [2022-11-03 01:48:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 6 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 01:48:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 11873 transitions. [2022-11-03 01:48:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 01:48:36,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:36,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:36,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-03 01:48:36,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:36,896 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:36,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1779635161, now seen corresponding path program 1 times [2022-11-03 01:48:36,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:36,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899101413] [2022-11-03 01:48:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:36,899 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:36,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:48:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:48:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:48:37,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:37,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899101413] [2022-11-03 01:48:37,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899101413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:37,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:37,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:48:37,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919024123] [2022-11-03 01:48:37,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:37,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:48:37,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:48:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:48:37,865 INFO L87 Difference]: Start difference. First operand 7530 states and 11873 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 01:48:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:45,243 INFO L93 Difference]: Finished difference Result 16627 states and 26415 transitions. [2022-11-03 01:48:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:48:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) Word has length 190 [2022-11-03 01:48:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:45,339 INFO L225 Difference]: With dead ends: 16627 [2022-11-03 01:48:45,339 INFO L226 Difference]: Without dead ends: 10158 [2022-11-03 01:48:45,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:48:45,373 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 1734 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 4716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:45,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1816 Valid, 2382 Invalid, 4716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 4286 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 01:48:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10158 states. [2022-11-03 01:48:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10158 to 9960. [2022-11-03 01:48:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9960 states, 7416 states have (on average 1.509843581445523) internal successors, (11197), 7843 states have internal predecessors, (11197), 1946 states have call successors, (1946), 508 states have call predecessors, (1946), 597 states have return successors, (2610), 1888 states have call predecessors, (2610), 1942 states have call successors, (2610) [2022-11-03 01:48:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9960 states to 9960 states and 15753 transitions. [2022-11-03 01:48:46,947 INFO L78 Accepts]: Start accepts. Automaton has 9960 states and 15753 transitions. Word has length 190 [2022-11-03 01:48:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:46,948 INFO L495 AbstractCegarLoop]: Abstraction has 9960 states and 15753 transitions. [2022-11-03 01:48:46,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 01:48:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 9960 states and 15753 transitions. [2022-11-03 01:48:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-03 01:48:46,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:46,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:46,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:47,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:47,178 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash 902028657, now seen corresponding path program 1 times [2022-11-03 01:48:47,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:47,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118510475] [2022-11-03 01:48:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:47,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:47,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:47,181 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:47,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:48:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:47,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:47,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:48,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:48,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118510475] [2022-11-03 01:48:48,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118510475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:48,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793721271] [2022-11-03 01:48:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:48,616 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:48,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 01:48:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:48:49,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793721271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:49,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:48:49,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 01:48:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263110358] [2022-11-03 01:48:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:49,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:48:49,271 INFO L87 Difference]: Start difference. First operand 9960 states and 15753 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 01:48:52,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:52,225 INFO L93 Difference]: Finished difference Result 29572 states and 47066 transitions. [2022-11-03 01:48:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2022-11-03 01:48:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:52,381 INFO L225 Difference]: With dead ends: 29572 [2022-11-03 01:48:52,381 INFO L226 Difference]: Without dead ends: 19691 [2022-11-03 01:48:52,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:48:52,438 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 783 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:52,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 2251 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:48:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19691 states. [2022-11-03 01:48:55,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19691 to 19689. [2022-11-03 01:48:55,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19689 states, 14668 states have (on average 1.5083856013089718) internal successors, (22125), 15518 states have internal predecessors, (22125), 3832 states have call successors, (3832), 1008 states have call predecessors, (3832), 1188 states have return successors, (5280), 3722 states have call predecessors, (5280), 3828 states have call successors, (5280) [2022-11-03 01:48:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19689 states to 19689 states and 31237 transitions. [2022-11-03 01:48:55,531 INFO L78 Accepts]: Start accepts. Automaton has 19689 states and 31237 transitions. Word has length 191 [2022-11-03 01:48:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:55,532 INFO L495 AbstractCegarLoop]: Abstraction has 19689 states and 31237 transitions. [2022-11-03 01:48:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 01:48:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19689 states and 31237 transitions. [2022-11-03 01:48:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 01:48:55,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:55,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:48:55,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 01:48:55,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-03 01:48:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:55,937 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2102022764, now seen corresponding path program 1 times [2022-11-03 01:48:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:55,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052545559] [2022-11-03 01:48:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:55,950 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:55,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 01:48:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:56,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:56,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:57,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052545559] [2022-11-03 01:48:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052545559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [623451937] [2022-11-03 01:48:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:57,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:57,329 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:57,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 01:48:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:48:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:58,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [623451937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499034452] [2022-11-03 01:48:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:58,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:58,626 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:58,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 01:48:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:48:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:59,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:48:59,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499034452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:59,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:59,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2022-11-03 01:48:59,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531723047] [2022-11-03 01:48:59,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:59,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:48:59,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:48:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:48:59,780 INFO L87 Difference]: Start difference. First operand 19689 states and 31237 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-03 01:49:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:08,139 INFO L93 Difference]: Finished difference Result 30428 states and 48262 transitions. [2022-11-03 01:49:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:49:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2022-11-03 01:49:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:08,263 INFO L225 Difference]: With dead ends: 30428 [2022-11-03 01:49:08,264 INFO L226 Difference]: Without dead ends: 20691 [2022-11-03 01:49:08,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:08,307 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 1690 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 3785 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 4207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 3785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:08,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1764 Valid, 2317 Invalid, 4207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 3785 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 01:49:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20691 states. [2022-11-03 01:49:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20691 to 19827. [2022-11-03 01:49:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19827 states, 14760 states have (on average 1.5018970189701897) internal successors, (22168), 15656 states have internal predecessors, (22168), 3832 states have call successors, (3832), 1008 states have call predecessors, (3832), 1234 states have return successors, (5274), 3722 states have call predecessors, (5274), 3828 states have call successors, (5274) [2022-11-03 01:49:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19827 states to 19827 states and 31274 transitions. [2022-11-03 01:49:11,306 INFO L78 Accepts]: Start accepts. Automaton has 19827 states and 31274 transitions. Word has length 192 [2022-11-03 01:49:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:11,307 INFO L495 AbstractCegarLoop]: Abstraction has 19827 states and 31274 transitions. [2022-11-03 01:49:11,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-03 01:49:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19827 states and 31274 transitions. [2022-11-03 01:49:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-03 01:49:11,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:11,311 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:11,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-03 01:49:11,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 01:49:11,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-03 01:49:11,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:11,912 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash 651211552, now seen corresponding path program 1 times [2022-11-03 01:49:11,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:11,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658822943] [2022-11-03 01:49:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:11,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:11,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:11,915 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:11,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348a02da-3836-455c-9451-ac551ae7e1b8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:49:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:12,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:49:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:49:12,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:12,521 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658822943] [2022-11-03 01:49:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658822943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:12,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:12,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:49:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789353513] [2022-11-03 01:49:12,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:12,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:12,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:12,524 INFO L87 Difference]: Start difference. First operand 19827 states and 31274 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 01:49:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:18,187 INFO L93 Difference]: Finished difference Result 48087 states and 74893 transitions. [2022-11-03 01:49:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 195 [2022-11-03 01:49:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:18,404 INFO L225 Difference]: With dead ends: 48087 [2022-11-03 01:49:18,404 INFO L226 Difference]: Without dead ends: 30333 [2022-11-03 01:49:18,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:18,484 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 351 mSDsluCounter, 3616 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 4571 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:18,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 4571 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30333 states.