./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/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_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/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 64bit --witnessprinter.graph.data.programhash 958b2cff64b8fceb0cc12cf5dd7a9dde08c134b5c0d92789485d456e6d4fd48a --- 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 02:14:52,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:14:52,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:14:52,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:14:52,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:14:52,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:14:52,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:14:52,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:14:52,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:14:52,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:14:52,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:14:52,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:14:52,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:14:52,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:14:52,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:14:52,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:14:52,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:14:52,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:14:52,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:14:52,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:14:52,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:14:52,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:14:52,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:14:52,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:14:52,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:14:52,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:14:52,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:14:52,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:14:52,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:14:52,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:14:52,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:14:52,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:14:52,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:14:52,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:14:52,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:14:52,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:14:52,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:14:52,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:14:52,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:14:52,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:14:52,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:14:52,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:14:52,970 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:14:52,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:14:52,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:14:52,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:14:52,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:14:52,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:14:52,973 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:14:52,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:14:52,974 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:14:52,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:14:52,975 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:14:52,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:14:52,976 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:14:52,976 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:14:52,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:14:52,976 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:14:52,977 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:14:52,977 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:14:52,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:14:52,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:14:52,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:14:52,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:14:52,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:14:52,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:14:52,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:14:52,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:14:52,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:14:52,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:14:52,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:14:52,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:52,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:14:52,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:14:52,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:14:52,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:14:52,983 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:14:52,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:14:52,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:14:52,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:14:52,984 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_b03e877d-e2ac-4b5c-9491-1556410076a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 958b2cff64b8fceb0cc12cf5dd7a9dde08c134b5c0d92789485d456e6d4fd48a [2022-11-03 02:14:53,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:14:53,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:14:53,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:14:53,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:14:53,343 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:14:53,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c [2022-11-03 02:14:53,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/9133595ce/ae880ea3fd704327a7181c2f710fb97f/FLAG814d2be43 [2022-11-03 02:14:54,216 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:14:54,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c [2022-11-03 02:14:54,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/9133595ce/ae880ea3fd704327a7181c2f710fb97f/FLAG814d2be43 [2022-11-03 02:14:54,333 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/9133595ce/ae880ea3fd704327a7181c2f710fb97f [2022-11-03 02:14:54,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:14:54,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:14:54,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:54,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:14:54,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:14:54,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:54" (1/1) ... [2022-11-03 02:14:54,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2b6186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:54, skipping insertion in model container [2022-11-03 02:14:54,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:54" (1/1) ... [2022-11-03 02:14:54,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:14:54,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:14:54,716 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_b03e877d-e2ac-4b5c-9491-1556410076a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c[1107,1120] [2022-11-03 02:14:55,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:55,179 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:14:55,191 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_b03e877d-e2ac-4b5c-9491-1556410076a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c[1107,1120] [2022-11-03 02:14:55,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:55,461 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:14:55,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55 WrapperNode [2022-11-03 02:14:55,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:55,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:55,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:14:55,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:14:55,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,802 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2154 [2022-11-03 02:14:55,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:55,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:14:55,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:14:55,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:14:55,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:55,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:14:55,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:14:55,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:14:55,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:14:55,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (1/1) ... [2022-11-03 02:14:56,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:56,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:14:56,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:14:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:14:56,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:14:56,624 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:14:56,627 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:15:01,706 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:15:15,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:15:15,458 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:15:15,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:15:15 BoogieIcfgContainer [2022-11-03 02:15:15,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:15:15,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:15:15,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:15:15,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:15:15,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:14:54" (1/3) ... [2022-11-03 02:15:15,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5c9b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:15:15, skipping insertion in model container [2022-11-03 02:15:15,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:55" (2/3) ... [2022-11-03 02:15:15,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5c9b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:15:15, skipping insertion in model container [2022-11-03 02:15:15,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:15:15" (3/3) ... [2022-11-03 02:15:15,471 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_am2910_p1.c [2022-11-03 02:15:15,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:15:15,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:15:15,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:15:15,571 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;@207eac82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:15:15,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:15:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:15:15,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:15,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:15:15,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 23642586, now seen corresponding path program 1 times [2022-11-03 02:15:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:15,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17041565] [2022-11-03 02:15:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:15:16,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:15:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:15:16,580 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:15:16,584 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:15:16,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:15:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:15:16,592 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:15:16,597 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:15:16,639 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:15:16,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:15:16 BoogieIcfgContainer [2022-11-03 02:15:16,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:15:16,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:15:16,667 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:15:16,667 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:15:16,668 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:15:15" (3/4) ... [2022-11-03 02:15:16,672 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:15:16,672 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:15:16,674 INFO L158 Benchmark]: Toolchain (without parser) took 22336.58ms. Allocated memory was 94.4MB in the beginning and 3.0GB in the end (delta: 2.9GB). Free memory was 68.8MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 655.2MB. Max. memory is 16.1GB. [2022-11-03 02:15:16,675 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 94.4MB. Free memory is still 49.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:15:16,676 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1123.93ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 68.5MB in the beginning and 92.9MB in the end (delta: -24.3MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. [2022-11-03 02:15:16,677 INFO L158 Benchmark]: Boogie Procedure Inliner took 339.74ms. Allocated memory is still 138.4MB. Free memory was 92.9MB in the beginning and 81.9MB in the end (delta: 10.9MB). Peak memory consumption was 49.9MB. Max. memory is 16.1GB. [2022-11-03 02:15:16,678 INFO L158 Benchmark]: Boogie Preprocessor took 188.40ms. Allocated memory is still 138.4MB. Free memory was 81.9MB in the beginning and 64.0MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 02:15:16,679 INFO L158 Benchmark]: RCFGBuilder took 19468.68ms. Allocated memory was 138.4MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 63.4MB in the beginning and 2.4GB in the end (delta: -2.3GB). Peak memory consumption was 986.3MB. Max. memory is 16.1GB. [2022-11-03 02:15:16,679 INFO L158 Benchmark]: TraceAbstraction took 1200.99ms. Allocated memory is still 3.0GB. Free memory was 2.4GB in the beginning and 2.3GB in the end (delta: 87.0MB). Peak memory consumption was 88.1MB. Max. memory is 16.1GB. [2022-11-03 02:15:16,680 INFO L158 Benchmark]: Witness Printer took 6.06ms. Allocated memory is still 3.0GB. Free memory was 2.3GB in the beginning and 2.3GB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:15:16,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 94.4MB. Free memory is still 49.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1123.93ms. Allocated memory was 94.4MB in the beginning and 138.4MB in the end (delta: 44.0MB). Free memory was 68.5MB in the beginning and 92.9MB in the end (delta: -24.3MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 339.74ms. Allocated memory is still 138.4MB. Free memory was 92.9MB in the beginning and 81.9MB in the end (delta: 10.9MB). Peak memory consumption was 49.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 188.40ms. Allocated memory is still 138.4MB. Free memory was 81.9MB in the beginning and 64.0MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * RCFGBuilder took 19468.68ms. Allocated memory was 138.4MB in the beginning and 3.0GB in the end (delta: 2.8GB). Free memory was 63.4MB in the beginning and 2.4GB in the end (delta: -2.3GB). Peak memory consumption was 986.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1200.99ms. Allocated memory is still 3.0GB. Free memory was 2.4GB in the beginning and 2.3GB in the end (delta: 87.0MB). Peak memory consumption was 88.1MB. Max. memory is 16.1GB. * Witness Printer took 6.06ms. Allocated memory is still 3.0GB. Free memory was 2.3GB in the beginning and 2.3GB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 203, overapproximation of bitwiseOr at line 198, overapproximation of bitwiseAnd at line 145. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 12); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (12 - 1); [L28] const SORT_6 mask_SORT_6 = (SORT_6)-1 >> (sizeof(SORT_6) * 8 - 1); [L29] const SORT_6 msb_SORT_6 = (SORT_6)1 << (1 - 1); [L31] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 4); [L32] const SORT_11 msb_SORT_11 = (SORT_11)1 << (4 - 1); [L34] const SORT_37 mask_SORT_37 = (SORT_37)-1 >> (sizeof(SORT_37) * 8 - 32); [L35] const SORT_37 msb_SORT_37 = (SORT_37)1 << (32 - 1); [L37] const SORT_41 mask_SORT_41 = (SORT_41)-1 >> (sizeof(SORT_41) * 8 - 3); [L38] const SORT_41 msb_SORT_41 = (SORT_41)1 << (3 - 1); [L40] const SORT_289 mask_SORT_289 = (SORT_289)-1 >> (sizeof(SORT_289) * 8 - 2); [L41] const SORT_289 msb_SORT_289 = (SORT_289)1 << (2 - 1); [L43] const SORT_293 mask_SORT_293 = (SORT_293)-1 >> (sizeof(SORT_293) * 8 - 5); [L44] const SORT_293 msb_SORT_293 = (SORT_293)1 << (5 - 1); [L46] const SORT_295 mask_SORT_295 = (SORT_295)-1 >> (sizeof(SORT_295) * 8 - 6); [L47] const SORT_295 msb_SORT_295 = (SORT_295)1 << (6 - 1); [L49] const SORT_297 mask_SORT_297 = (SORT_297)-1 >> (sizeof(SORT_297) * 8 - 7); [L50] const SORT_297 msb_SORT_297 = (SORT_297)1 << (7 - 1); [L52] const SORT_299 mask_SORT_299 = (SORT_299)-1 >> (sizeof(SORT_299) * 8 - 8); [L53] const SORT_299 msb_SORT_299 = (SORT_299)1 << (8 - 1); [L55] const SORT_301 mask_SORT_301 = (SORT_301)-1 >> (sizeof(SORT_301) * 8 - 9); [L56] const SORT_301 msb_SORT_301 = (SORT_301)1 << (9 - 1); [L58] const SORT_303 mask_SORT_303 = (SORT_303)-1 >> (sizeof(SORT_303) * 8 - 10); [L59] const SORT_303 msb_SORT_303 = (SORT_303)1 << (10 - 1); [L61] const SORT_305 mask_SORT_305 = (SORT_305)-1 >> (sizeof(SORT_305) * 8 - 11); [L62] const SORT_305 msb_SORT_305 = (SORT_305)1 << (11 - 1); [L64] const SORT_1 var_16 = 0; [L65] const SORT_6 var_21 = 0; [L66] const SORT_37 var_39 = 0; [L67] const SORT_41 var_42 = 0; [L68] const SORT_41 var_45 = 6; [L69] const SORT_41 var_47 = 7; [L70] const SORT_6 var_53 = 1; [L71] const SORT_11 var_57 = 2; [L72] const SORT_11 var_62 = 9; [L73] const SORT_11 var_70 = 15; [L74] const SORT_11 var_75 = 1; [L75] const SORT_11 var_77 = 3; [L76] const SORT_11 var_80 = 5; [L77] const SORT_11 var_83 = 7; [L78] const SORT_11 var_86 = 11; [L79] const SORT_11 var_108 = 8; [L80] const SORT_11 var_112 = 10; [L81] const SORT_11 var_116 = 13; [L82] const SORT_11 var_127 = 4; [L83] const SORT_11 var_129 = 12; [L84] const SORT_11 var_132 = 14; [L85] const SORT_11 var_138 = 6; [L86] const SORT_11 var_165 = 0; [L87] const SORT_41 var_209 = 1; [L88] const SORT_41 var_211 = 5; [L89] const SORT_1 var_229 = 4095; [L90] const SORT_1 var_569 = 1; [L91] const SORT_305 var_577 = 0; [L93] SORT_1 input_2; [L94] SORT_1 input_3; [L95] SORT_1 input_4; [L96] SORT_1 input_5; [L97] SORT_6 input_7; [L98] SORT_6 input_8; [L99] SORT_6 input_9; [L100] SORT_1 input_10; [L101] SORT_11 input_12; [L102] SORT_6 input_13; [L103] SORT_6 input_14; [L104] SORT_6 input_15; [L105] SORT_1 input_216; [L106] SORT_41 input_219; [L108] SORT_1 state_17 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L109] SORT_1 state_19 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L110] SORT_1 state_23 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L111] SORT_1 state_25 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L112] SORT_1 state_29 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L113] SORT_1 state_31 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L114] SORT_41 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_41; [L115] SORT_1 state_59 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L116] SORT_1 state_125 = __VERIFIER_nondet_ushort() & mask_SORT_1; [L118] SORT_1 init_18_arg_1 = var_16; [L119] state_17 = init_18_arg_1 [L120] SORT_1 init_20_arg_1 = var_16; [L121] state_19 = init_20_arg_1 [L122] SORT_1 init_24_arg_1 = var_16; [L123] state_23 = init_24_arg_1 [L124] SORT_1 init_26_arg_1 = var_16; [L125] state_25 = init_26_arg_1 [L126] SORT_1 init_30_arg_1 = var_16; [L127] state_29 = init_30_arg_1 [L128] SORT_1 init_32_arg_1 = var_16; [L129] state_31 = init_32_arg_1 [L130] SORT_41 init_44_arg_1 = var_42; [L131] state_43 = init_44_arg_1 [L132] SORT_1 init_60_arg_1 = var_16; [L133] state_59 = init_60_arg_1 [L134] SORT_1 init_126_arg_1 = var_16; [L135] state_125 = init_126_arg_1 VAL [init_126_arg_1=0, init_18_arg_1=0, init_20_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_44_arg_1=0, init_60_arg_1=0, mask_SORT_1=4095, mask_SORT_11=15, mask_SORT_289=3, mask_SORT_293=31, mask_SORT_295=63, mask_SORT_297=127, mask_SORT_299=255, mask_SORT_301=511, mask_SORT_303=1023, mask_SORT_305=2047, mask_SORT_37=4294967295, mask_SORT_41=7, mask_SORT_6=1, msb_SORT_1=2048, msb_SORT_11=8, msb_SORT_289=2, msb_SORT_293=16, msb_SORT_295=32, msb_SORT_297=64, msb_SORT_299=128, msb_SORT_301=256, msb_SORT_303=512, msb_SORT_305=1024, msb_SORT_37=2147483648, msb_SORT_41=4, msb_SORT_6=1, state_125=0, state_17=0, state_19=0, state_23=0, state_25=0, state_29=0, state_31=0, state_43=0, state_59=0, var_108=8, var_112=10, var_116=13, var_127=4, var_129=12, var_132=14, var_138=6, var_16=0, var_165=0, var_209=1, var_21=0, var_211=5, var_229=4095, var_39=0, var_42=0, var_45=6, var_47=7, var_53=1, var_569=1, var_57=2, var_577=0, var_62=9, var_70=15, var_75=1, var_77=3, var_80=5, var_83=7, var_86=11] [L138] input_2 = __VERIFIER_nondet_ushort() [L139] input_3 = __VERIFIER_nondet_ushort() [L140] input_4 = __VERIFIER_nondet_ushort() [L141] input_5 = __VERIFIER_nondet_ushort() [L142] input_7 = __VERIFIER_nondet_uchar() [L143] input_8 = __VERIFIER_nondet_uchar() [L144] input_9 = __VERIFIER_nondet_uchar() [L145] input_9 = input_9 & mask_SORT_6 [L146] input_10 = __VERIFIER_nondet_ushort() [L147] input_12 = __VERIFIER_nondet_uchar() [L148] input_12 = input_12 & mask_SORT_11 [L149] input_13 = __VERIFIER_nondet_uchar() [L150] input_14 = __VERIFIER_nondet_uchar() [L151] input_15 = __VERIFIER_nondet_uchar() [L152] input_216 = __VERIFIER_nondet_ushort() [L153] input_219 = __VERIFIER_nondet_uchar() [L156] SORT_6 var_34_arg_0 = var_21; [L157] SORT_1 var_34_arg_1 = input_5; [L158] SORT_1 var_34_arg_2 = input_4; [L159] EXPR var_34_arg_0 ? var_34_arg_1 : var_34_arg_2 [L159] SORT_1 var_34 = var_34_arg_0 ? var_34_arg_1 : var_34_arg_2; [L160] SORT_6 var_33_arg_0 = var_21; [L161] SORT_1 var_33_arg_1 = state_31; [L162] SORT_1 var_33_arg_2 = state_29; [L163] EXPR var_33_arg_0 ? var_33_arg_1 : var_33_arg_2 [L163] SORT_1 var_33 = var_33_arg_0 ? var_33_arg_1 : var_33_arg_2; [L164] SORT_6 var_35_arg_0 = var_21; [L165] SORT_1 var_35_arg_1 = var_34; [L166] SORT_1 var_35_arg_2 = var_33; [L167] EXPR var_35_arg_0 ? var_35_arg_1 : var_35_arg_2 [L167] SORT_1 var_35 = var_35_arg_0 ? var_35_arg_1 : var_35_arg_2; [L168] SORT_6 var_27_arg_0 = var_21; [L169] SORT_1 var_27_arg_1 = state_25; [L170] SORT_1 var_27_arg_2 = state_23; [L171] EXPR var_27_arg_0 ? var_27_arg_1 : var_27_arg_2 [L171] SORT_1 var_27 = var_27_arg_0 ? var_27_arg_1 : var_27_arg_2; [L172] SORT_6 var_22_arg_0 = var_21; [L173] SORT_1 var_22_arg_1 = state_19; [L174] SORT_1 var_22_arg_2 = state_17; [L175] EXPR var_22_arg_0 ? var_22_arg_1 : var_22_arg_2 [L175] SORT_1 var_22 = var_22_arg_0 ? var_22_arg_1 : var_22_arg_2; [L176] SORT_6 var_28_arg_0 = var_21; [L177] SORT_1 var_28_arg_1 = var_27; [L178] SORT_1 var_28_arg_2 = var_22; [L179] EXPR var_28_arg_0 ? var_28_arg_1 : var_28_arg_2 [L179] SORT_1 var_28 = var_28_arg_0 ? var_28_arg_1 : var_28_arg_2; [L180] SORT_6 var_36_arg_0 = var_21; [L181] SORT_1 var_36_arg_1 = var_35; [L182] SORT_1 var_36_arg_2 = var_28; [L183] EXPR var_36_arg_0 ? var_36_arg_1 : var_36_arg_2 [L183] SORT_1 var_36 = var_36_arg_0 ? var_36_arg_1 : var_36_arg_2; [L184] SORT_1 var_38_arg_0 = var_36; [L185] var_38_arg_0 = var_38_arg_0 & mask_SORT_1 [L186] SORT_37 var_38 = var_38_arg_0; [L187] SORT_37 var_40_arg_0 = var_38; [L188] SORT_37 var_40_arg_1 = var_39; [L189] SORT_6 var_40 = var_40_arg_0 == var_40_arg_1; [L190] SORT_41 var_46_arg_0 = state_43; [L191] SORT_41 var_46_arg_1 = var_45; [L192] SORT_6 var_46 = var_46_arg_0 != var_46_arg_1; [L193] SORT_41 var_48_arg_0 = state_43; [L194] SORT_41 var_48_arg_1 = var_47; [L195] SORT_6 var_48 = var_48_arg_0 != var_48_arg_1; [L196] SORT_6 var_49_arg_0 = var_46; [L197] SORT_6 var_49_arg_1 = var_48; [L198] SORT_6 var_49 = var_49_arg_0 | var_49_arg_1; [L199] SORT_6 var_50_arg_0 = var_40; [L200] SORT_6 var_50_arg_1 = var_49; [L201] SORT_6 var_50 = var_50_arg_0 & var_50_arg_1; [L202] SORT_6 var_54_arg_0 = var_50; [L203] SORT_6 var_54 = ~var_54_arg_0; [L204] SORT_6 var_55_arg_0 = var_53; [L205] SORT_6 var_55_arg_1 = var_54; [L206] SORT_6 var_55 = var_55_arg_0 & var_55_arg_1; [L207] var_55 = var_55 & mask_SORT_6 [L208] SORT_6 bad_56_arg_0 = var_55; [L209] CALL __VERIFIER_assert(!(bad_56_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:15:16,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/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_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/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 64bit --witnessprinter.graph.data.programhash 958b2cff64b8fceb0cc12cf5dd7a9dde08c134b5c0d92789485d456e6d4fd48a --- 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 02:15:19,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:15:19,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:15:19,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:15:19,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:15:19,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:15:19,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:15:19,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:15:19,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:15:19,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:15:19,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:15:19,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:15:19,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:15:19,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:15:19,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:15:19,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:15:19,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:15:19,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:15:19,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:15:19,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:15:19,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:15:19,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:15:19,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:15:19,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:15:19,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:15:19,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:15:19,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:15:19,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:15:19,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:15:19,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:15:19,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:15:19,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:15:19,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:15:19,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:15:19,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:15:19,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:15:19,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:15:19,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:15:19,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:15:19,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:15:19,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:15:19,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:15:19,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:15:19,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:15:19,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:15:19,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:15:19,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:15:19,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:15:19,664 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:15:19,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:15:19,665 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:15:19,665 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:15:19,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:15:19,666 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:15:19,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:15:19,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:15:19,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:15:19,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:15:19,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:15:19,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:15:19,669 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:15:19,669 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:15:19,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:15:19,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:15:19,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:15:19,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:15:19,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:15:19,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:15:19,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:15:19,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:15:19,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:15:19,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:15:19,671 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:15:19,671 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:19,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:15:19,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:15:19,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:15:19,672 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_b03e877d-e2ac-4b5c-9491-1556410076a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 958b2cff64b8fceb0cc12cf5dd7a9dde08c134b5c0d92789485d456e6d4fd48a [2022-11-03 02:15:20,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:15:20,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:15:20,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:15:20,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:15:20,071 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:15:20,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c [2022-11-03 02:15:20,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/54cd41a9e/341e901c4a5e4d4c90807933ff04fcec/FLAGbd1f452f6 [2022-11-03 02:15:20,886 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:15:20,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c [2022-11-03 02:15:20,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/54cd41a9e/341e901c4a5e4d4c90807933ff04fcec/FLAGbd1f452f6 [2022-11-03 02:15:21,067 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/data/54cd41a9e/341e901c4a5e4d4c90807933ff04fcec [2022-11-03 02:15:21,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:15:21,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:15:21,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:15:21,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:15:21,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:15:21,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:15:21" (1/1) ... [2022-11-03 02:15:21,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:21, skipping insertion in model container [2022-11-03 02:15:21,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:15:21" (1/1) ... [2022-11-03 02:15:21,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:15:21,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:15:21,358 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_b03e877d-e2ac-4b5c-9491-1556410076a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c[1107,1120] [2022-11-03 02:15:21,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:15:21,871 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:15:21,884 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_b03e877d-e2ac-4b5c-9491-1556410076a5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_am2910_p1.c[1107,1120] [2022-11-03 02:15:22,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:15:22,100 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:15:22,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22 WrapperNode [2022-11-03 02:15:22,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:15:22,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:15:22,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:15:22,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:15:22,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,248 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2154 [2022-11-03 02:15:22,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:15:22,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:15:22,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:15:22,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:15:22,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:15:22,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:15:22,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:15:22,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:15:22,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (1/1) ... [2022-11-03 02:15:22,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:15:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:22,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:15:22,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:15:22,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:15:22,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:15:23,040 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:15:23,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:15:24,683 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:15:24,699 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:15:24,700 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:15:24,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:15:24 BoogieIcfgContainer [2022-11-03 02:15:24,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:15:24,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:15:24,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:15:24,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:15:24,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:15:21" (1/3) ... [2022-11-03 02:15:24,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c42dc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:15:24, skipping insertion in model container [2022-11-03 02:15:24,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:15:22" (2/3) ... [2022-11-03 02:15:24,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c42dc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:15:24, skipping insertion in model container [2022-11-03 02:15:24,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:15:24" (3/3) ... [2022-11-03 02:15:24,714 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_am2910_p1.c [2022-11-03 02:15:24,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:15:24,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:15:24,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:15:24,856 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;@4913790b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:15:24,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:15:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 209 states have (on average 1.4976076555023923) internal successors, (313), 210 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:24,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:24,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:24,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1799458747, now seen corresponding path program 1 times [2022-11-03 02:15:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:24,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242274050] [2022-11-03 02:15:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:24,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:24,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:24,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:24,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:15:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:25,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:25,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242274050] [2022-11-03 02:15:25,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242274050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:25,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:25,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:25,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843553909] [2022-11-03 02:15:25,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:25,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:25,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:25,569 INFO L87 Difference]: Start difference. First operand has 211 states, 209 states have (on average 1.4976076555023923) internal successors, (313), 210 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:25,699 INFO L93 Difference]: Finished difference Result 417 states and 624 transitions. [2022-11-03 02:15:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:25,717 INFO L225 Difference]: With dead ends: 417 [2022-11-03 02:15:25,718 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 02:15:25,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:25,731 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 607 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:25,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 299 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 02:15:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-11-03 02:15:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 306 transitions. [2022-11-03 02:15:25,788 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 306 transitions. Word has length 19 [2022-11-03 02:15:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:25,789 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 306 transitions. [2022-11-03 02:15:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 306 transitions. [2022-11-03 02:15:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:25,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:25,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:25,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:26,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:26,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1474440195, now seen corresponding path program 1 times [2022-11-03 02:15:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:26,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681490707] [2022-11-03 02:15:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:26,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:26,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:15:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:26,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:26,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:26,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681490707] [2022-11-03 02:15:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681490707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:26,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:26,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504555507] [2022-11-03 02:15:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:26,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:26,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:26,438 INFO L87 Difference]: Start difference. First operand 207 states and 306 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:26,513 INFO L93 Difference]: Finished difference Result 415 states and 613 transitions. [2022-11-03 02:15:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:26,517 INFO L225 Difference]: With dead ends: 415 [2022-11-03 02:15:26,518 INFO L226 Difference]: Without dead ends: 210 [2022-11-03 02:15:26,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:26,523 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 603 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:26,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 300 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-03 02:15:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2022-11-03 02:15:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4805825242718447) internal successors, (305), 206 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 305 transitions. [2022-11-03 02:15:26,547 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 305 transitions. Word has length 19 [2022-11-03 02:15:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:26,548 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 305 transitions. [2022-11-03 02:15:26,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 305 transitions. [2022-11-03 02:15:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:26,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:26,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:26,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:26,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:26,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:26,769 INFO L85 PathProgramCache]: Analyzing trace with hash 463322945, now seen corresponding path program 1 times [2022-11-03 02:15:26,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:26,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621734946] [2022-11-03 02:15:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:26,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:26,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:26,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:15:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:27,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:27,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:27,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:27,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621734946] [2022-11-03 02:15:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621734946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:27,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:27,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:27,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973888164] [2022-11-03 02:15:27,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:27,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:27,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:27,229 INFO L87 Difference]: Start difference. First operand 207 states and 305 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:27,280 INFO L93 Difference]: Finished difference Result 417 states and 613 transitions. [2022-11-03 02:15:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:27,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:27,281 INFO L225 Difference]: With dead ends: 417 [2022-11-03 02:15:27,282 INFO L226 Difference]: Without dead ends: 212 [2022-11-03 02:15:27,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:27,287 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 599 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:27,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 301 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-03 02:15:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2022-11-03 02:15:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4757281553398058) internal successors, (304), 206 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-11-03 02:15:27,314 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 19 [2022-11-03 02:15:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:27,314 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-11-03 02:15:27,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-11-03 02:15:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:27,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:27,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:27,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:27,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash 721488383, now seen corresponding path program 1 times [2022-11-03 02:15:27,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:27,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918208544] [2022-11-03 02:15:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:27,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:27,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:27,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:27,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:15:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:27,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:27,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918208544] [2022-11-03 02:15:27,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918208544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:27,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:27,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:27,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421504800] [2022-11-03 02:15:27,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:27,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:27,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:27,961 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:28,011 INFO L93 Difference]: Finished difference Result 419 states and 613 transitions. [2022-11-03 02:15:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:28,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:28,013 INFO L225 Difference]: With dead ends: 419 [2022-11-03 02:15:28,013 INFO L226 Difference]: Without dead ends: 214 [2022-11-03 02:15:28,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:28,015 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 595 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:28,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 302 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-03 02:15:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2022-11-03 02:15:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.470873786407767) internal successors, (303), 206 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 303 transitions. [2022-11-03 02:15:28,023 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 303 transitions. Word has length 19 [2022-11-03 02:15:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:28,024 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 303 transitions. [2022-11-03 02:15:28,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 303 transitions. [2022-11-03 02:15:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:28,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:28,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:28,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:28,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 328461373, now seen corresponding path program 1 times [2022-11-03 02:15:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041191720] [2022-11-03 02:15:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:28,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:28,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:15:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:28,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:28,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041191720] [2022-11-03 02:15:28,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041191720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:28,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:28,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055806103] [2022-11-03 02:15:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:28,629 INFO L87 Difference]: Start difference. First operand 207 states and 303 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:28,681 INFO L93 Difference]: Finished difference Result 421 states and 613 transitions. [2022-11-03 02:15:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:28,682 INFO L225 Difference]: With dead ends: 421 [2022-11-03 02:15:28,683 INFO L226 Difference]: Without dead ends: 216 [2022-11-03 02:15:28,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:28,684 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 591 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:28,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 303 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-03 02:15:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 207. [2022-11-03 02:15:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4660194174757282) internal successors, (302), 206 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 302 transitions. [2022-11-03 02:15:28,691 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 302 transitions. Word has length 19 [2022-11-03 02:15:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:28,691 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 302 transitions. [2022-11-03 02:15:28,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 302 transitions. [2022-11-03 02:15:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:28,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:28,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:28,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:28,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:28,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -480885253, now seen corresponding path program 1 times [2022-11-03 02:15:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:28,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377092962] [2022-11-03 02:15:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:28,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:28,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:28,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:28,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:15:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:29,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:29,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377092962] [2022-11-03 02:15:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377092962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:29,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237979136] [2022-11-03 02:15:29,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:29,297 INFO L87 Difference]: Start difference. First operand 207 states and 302 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:29,355 INFO L93 Difference]: Finished difference Result 423 states and 613 transitions. [2022-11-03 02:15:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:29,357 INFO L225 Difference]: With dead ends: 423 [2022-11-03 02:15:29,357 INFO L226 Difference]: Without dead ends: 218 [2022-11-03 02:15:29,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:29,358 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 587 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:29,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 304 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-03 02:15:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 207. [2022-11-03 02:15:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4611650485436893) internal successors, (301), 206 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 301 transitions. [2022-11-03 02:15:29,367 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 301 transitions. Word has length 19 [2022-11-03 02:15:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:29,367 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 301 transitions. [2022-11-03 02:15:29,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 301 transitions. [2022-11-03 02:15:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:29,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:29,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:29,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:29,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash -423626951, now seen corresponding path program 1 times [2022-11-03 02:15:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722987876] [2022-11-03 02:15:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:29,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:29,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:15:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:15:29,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:30,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:30,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:30,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722987876] [2022-11-03 02:15:30,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722987876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:30,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:15:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456225923] [2022-11-03 02:15:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:30,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:15:30,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:15:30,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:15:30,013 INFO L87 Difference]: Start difference. First operand 207 states and 301 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:30,082 INFO L93 Difference]: Finished difference Result 425 states and 613 transitions. [2022-11-03 02:15:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:15:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:30,084 INFO L225 Difference]: With dead ends: 425 [2022-11-03 02:15:30,084 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:15:30,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:15:30,086 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 583 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:30,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 305 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:15:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 207. [2022-11-03 02:15:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4563106796116505) internal successors, (300), 206 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 300 transitions. [2022-11-03 02:15:30,098 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 300 transitions. Word has length 19 [2022-11-03 02:15:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:30,099 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 300 transitions. [2022-11-03 02:15:30,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 300 transitions. [2022-11-03 02:15:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:15:30,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:30,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:30,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-03 02:15:30,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:30,316 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash -423567369, now seen corresponding path program 1 times [2022-11-03 02:15:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:30,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941518712] [2022-11-03 02:15:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:30,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:30,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:30,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:15:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:30,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:15:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:31,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:31,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:31,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941518712] [2022-11-03 02:15:31,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941518712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:31,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:31,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:15:31,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404921309] [2022-11-03 02:15:31,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:31,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:15:31,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:15:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:15:31,296 INFO L87 Difference]: Start difference. First operand 207 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:32,902 INFO L93 Difference]: Finished difference Result 427 states and 613 transitions. [2022-11-03 02:15:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:15:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:15:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:32,907 INFO L225 Difference]: With dead ends: 427 [2022-11-03 02:15:32,907 INFO L226 Difference]: Without dead ends: 425 [2022-11-03 02:15:32,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:15:32,908 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1425 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:32,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1425 Valid, 2069 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:15:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-03 02:15:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 223. [2022-11-03 02:15:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4234234234234233) internal successors, (316), 222 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 316 transitions. [2022-11-03 02:15:32,917 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 316 transitions. Word has length 19 [2022-11-03 02:15:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:32,918 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 316 transitions. [2022-11-03 02:15:32,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 316 transitions. [2022-11-03 02:15:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:32,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:32,924 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:32,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:33,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:33,137 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1804109241, now seen corresponding path program 1 times [2022-11-03 02:15:33,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:33,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595137515] [2022-11-03 02:15:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:33,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:33,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:33,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:15:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:15:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:34,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:34,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595137515] [2022-11-03 02:15:34,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595137515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:34,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:34,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:34,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637592587] [2022-11-03 02:15:34,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:34,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:34,354 INFO L87 Difference]: Start difference. First operand 223 states and 316 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:34,747 INFO L93 Difference]: Finished difference Result 838 states and 1209 transitions. [2022-11-03 02:15:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:34,750 INFO L225 Difference]: With dead ends: 838 [2022-11-03 02:15:34,750 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 02:15:34,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:15:34,751 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1172 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:34,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 1695 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-11-03 02:15:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 02:15:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 229. [2022-11-03 02:15:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.4210526315789473) internal successors, (324), 228 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 324 transitions. [2022-11-03 02:15:34,764 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 324 transitions. Word has length 222 [2022-11-03 02:15:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 324 transitions. [2022-11-03 02:15:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 324 transitions. [2022-11-03 02:15:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:34,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:34,769 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:34,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:34,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:34,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1520123703, now seen corresponding path program 1 times [2022-11-03 02:15:34,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:34,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500448983] [2022-11-03 02:15:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:34,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:34,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:34,978 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:34,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:15:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:15:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:36,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:36,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:36,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500448983] [2022-11-03 02:15:36,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500448983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:36,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:36,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574448155] [2022-11-03 02:15:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:36,088 INFO L87 Difference]: Start difference. First operand 229 states and 324 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:36,465 INFO L93 Difference]: Finished difference Result 838 states and 1208 transitions. [2022-11-03 02:15:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:36,468 INFO L225 Difference]: With dead ends: 838 [2022-11-03 02:15:36,468 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 02:15:36,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:15:36,469 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1165 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:36,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 1695 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-11-03 02:15:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 02:15:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 231. [2022-11-03 02:15:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.4173913043478261) internal successors, (326), 230 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 326 transitions. [2022-11-03 02:15:36,480 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 326 transitions. Word has length 222 [2022-11-03 02:15:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:36,481 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 326 transitions. [2022-11-03 02:15:36,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 326 transitions. [2022-11-03 02:15:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:36,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:36,485 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:36,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:36,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:36,700 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1050001355, now seen corresponding path program 1 times [2022-11-03 02:15:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:36,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431837037] [2022-11-03 02:15:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:36,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:36,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:36,704 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:36,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:15:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:37,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:37,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:37,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:37,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431837037] [2022-11-03 02:15:37,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431837037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:37,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:37,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006432133] [2022-11-03 02:15:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:37,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:37,797 INFO L87 Difference]: Start difference. First operand 231 states and 326 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:38,663 INFO L93 Difference]: Finished difference Result 851 states and 1225 transitions. [2022-11-03 02:15:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:38,667 INFO L225 Difference]: With dead ends: 851 [2022-11-03 02:15:38,667 INFO L226 Difference]: Without dead ends: 646 [2022-11-03 02:15:38,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:38,668 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 2017 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:38,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2017 Valid, 1184 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:15:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-11-03 02:15:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 235. [2022-11-03 02:15:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4145299145299146) internal successors, (331), 234 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 331 transitions. [2022-11-03 02:15:38,679 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 331 transitions. Word has length 222 [2022-11-03 02:15:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:38,681 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 331 transitions. [2022-11-03 02:15:38,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 331 transitions. [2022-11-03 02:15:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:38,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:38,684 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:38,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:38,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:38,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1231120563, now seen corresponding path program 1 times [2022-11-03 02:15:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:38,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862879955] [2022-11-03 02:15:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:38,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:15:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:39,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:39,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862879955] [2022-11-03 02:15:39,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862879955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:39,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:39,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002660905] [2022-11-03 02:15:39,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:39,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:39,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:39,901 INFO L87 Difference]: Start difference. First operand 235 states and 331 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:40,801 INFO L93 Difference]: Finished difference Result 857 states and 1231 transitions. [2022-11-03 02:15:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:40,804 INFO L225 Difference]: With dead ends: 857 [2022-11-03 02:15:40,804 INFO L226 Difference]: Without dead ends: 648 [2022-11-03 02:15:40,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:40,805 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 2009 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2009 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:40,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2009 Valid, 1197 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-11-03 02:15:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 237. [2022-11-03 02:15:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.4110169491525424) internal successors, (333), 236 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 333 transitions. [2022-11-03 02:15:40,815 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 333 transitions. Word has length 222 [2022-11-03 02:15:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:40,815 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 333 transitions. [2022-11-03 02:15:40,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 333 transitions. [2022-11-03 02:15:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:40,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:40,818 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:40,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:41,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:41,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash 983263055, now seen corresponding path program 1 times [2022-11-03 02:15:41,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003936126] [2022-11-03 02:15:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:41,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:41,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:41,045 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:41,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:15:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:42,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:42,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:42,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003936126] [2022-11-03 02:15:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003936126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:42,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:42,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097336358] [2022-11-03 02:15:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:42,043 INFO L87 Difference]: Start difference. First operand 237 states and 333 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:42,966 INFO L93 Difference]: Finished difference Result 861 states and 1234 transitions. [2022-11-03 02:15:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:42,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:42,969 INFO L225 Difference]: With dead ends: 861 [2022-11-03 02:15:42,969 INFO L226 Difference]: Without dead ends: 650 [2022-11-03 02:15:42,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:42,970 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 2001 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:42,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2001 Valid, 1203 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-03 02:15:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 239. [2022-11-03 02:15:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.4075630252100841) internal successors, (335), 238 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 335 transitions. [2022-11-03 02:15:42,981 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 335 transitions. Word has length 222 [2022-11-03 02:15:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:42,981 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 335 transitions. [2022-11-03 02:15:42,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 335 transitions. [2022-11-03 02:15:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:42,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:42,985 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:43,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:43,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:43,209 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:43,209 INFO L85 PathProgramCache]: Analyzing trace with hash -802140207, now seen corresponding path program 1 times [2022-11-03 02:15:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:43,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791477699] [2022-11-03 02:15:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:43,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:43,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:43,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:43,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:15:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:44,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:44,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:44,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791477699] [2022-11-03 02:15:44,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791477699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:44,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:44,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:44,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032588757] [2022-11-03 02:15:44,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:44,280 INFO L87 Difference]: Start difference. First operand 239 states and 335 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:45,210 INFO L93 Difference]: Finished difference Result 865 states and 1237 transitions. [2022-11-03 02:15:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:45,214 INFO L225 Difference]: With dead ends: 865 [2022-11-03 02:15:45,214 INFO L226 Difference]: Without dead ends: 652 [2022-11-03 02:15:45,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:45,216 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1993 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:45,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 1209 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-11-03 02:15:45,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 241. [2022-11-03 02:15:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4041666666666666) internal successors, (337), 240 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 337 transitions. [2022-11-03 02:15:45,227 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 337 transitions. Word has length 222 [2022-11-03 02:15:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:45,228 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 337 transitions. [2022-11-03 02:15:45,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 337 transitions. [2022-11-03 02:15:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:45,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:45,232 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:45,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:45,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:45,448 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -678858541, now seen corresponding path program 1 times [2022-11-03 02:15:45,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:45,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688768438] [2022-11-03 02:15:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:45,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:45,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:45,452 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:45,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:15:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:46,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:46,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:46,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688768438] [2022-11-03 02:15:46,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688768438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:46,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:46,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168459713] [2022-11-03 02:15:46,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:46,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:46,452 INFO L87 Difference]: Start difference. First operand 241 states and 337 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:47,327 INFO L93 Difference]: Finished difference Result 869 states and 1240 transitions. [2022-11-03 02:15:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:47,330 INFO L225 Difference]: With dead ends: 869 [2022-11-03 02:15:47,330 INFO L226 Difference]: Without dead ends: 654 [2022-11-03 02:15:47,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:47,331 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1985 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1985 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:47,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1985 Valid, 1215 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:15:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-03 02:15:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 243. [2022-11-03 02:15:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.4008264462809918) internal successors, (339), 242 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 339 transitions. [2022-11-03 02:15:47,342 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 339 transitions. Word has length 222 [2022-11-03 02:15:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:47,343 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 339 transitions. [2022-11-03 02:15:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 339 transitions. [2022-11-03 02:15:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:47,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:47,345 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:47,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:47,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 224062037, now seen corresponding path program 1 times [2022-11-03 02:15:47,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:47,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96445731] [2022-11-03 02:15:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:47,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:47,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:47,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:15:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:48,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:48,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:48,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96445731] [2022-11-03 02:15:48,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96445731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:48,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:48,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145088989] [2022-11-03 02:15:48,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:48,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:48,576 INFO L87 Difference]: Start difference. First operand 243 states and 339 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:49,462 INFO L93 Difference]: Finished difference Result 873 states and 1243 transitions. [2022-11-03 02:15:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:49,465 INFO L225 Difference]: With dead ends: 873 [2022-11-03 02:15:49,465 INFO L226 Difference]: Without dead ends: 656 [2022-11-03 02:15:49,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:49,467 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1977 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:49,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1977 Valid, 1221 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-11-03 02:15:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 245. [2022-11-03 02:15:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.3975409836065573) internal successors, (341), 244 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 341 transitions. [2022-11-03 02:15:49,477 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 341 transitions. Word has length 222 [2022-11-03 02:15:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:49,478 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 341 transitions. [2022-11-03 02:15:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 341 transitions. [2022-11-03 02:15:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:49,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:49,480 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:49,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:49,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:49,696 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:49,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash 216063063, now seen corresponding path program 1 times [2022-11-03 02:15:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:49,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97239267] [2022-11-03 02:15:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:49,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:49,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:49,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:15:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:50,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:50,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:50,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97239267] [2022-11-03 02:15:50,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97239267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:50,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:50,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143171468] [2022-11-03 02:15:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:50,738 INFO L87 Difference]: Start difference. First operand 245 states and 341 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:51,641 INFO L93 Difference]: Finished difference Result 879 states and 1249 transitions. [2022-11-03 02:15:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:51,645 INFO L225 Difference]: With dead ends: 879 [2022-11-03 02:15:51,645 INFO L226 Difference]: Without dead ends: 660 [2022-11-03 02:15:51,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:51,646 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1964 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:51,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 1235 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-03 02:15:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 249. [2022-11-03 02:15:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.3951612903225807) internal successors, (346), 248 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 346 transitions. [2022-11-03 02:15:51,656 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 346 transitions. Word has length 222 [2022-11-03 02:15:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:51,657 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 346 transitions. [2022-11-03 02:15:51,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 346 transitions. [2022-11-03 02:15:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:51,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:51,659 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:51,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:51,882 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1973690201, now seen corresponding path program 1 times [2022-11-03 02:15:51,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:51,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62001989] [2022-11-03 02:15:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:51,885 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:51,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:15:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:52,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:52,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:52,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62001989] [2022-11-03 02:15:52,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62001989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:52,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:52,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:52,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577862345] [2022-11-03 02:15:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:52,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:52,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:52,879 INFO L87 Difference]: Start difference. First operand 249 states and 346 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:53,802 INFO L93 Difference]: Finished difference Result 885 states and 1255 transitions. [2022-11-03 02:15:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:53,805 INFO L225 Difference]: With dead ends: 885 [2022-11-03 02:15:53,805 INFO L226 Difference]: Without dead ends: 662 [2022-11-03 02:15:53,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:53,806 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 1956 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1956 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:53,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1956 Valid, 1241 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-03 02:15:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 251. [2022-11-03 02:15:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.392) internal successors, (348), 250 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 348 transitions. [2022-11-03 02:15:53,817 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 348 transitions. Word has length 222 [2022-11-03 02:15:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:53,817 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 348 transitions. [2022-11-03 02:15:53,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 348 transitions. [2022-11-03 02:15:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:53,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:53,819 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:53,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:54,036 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1157642971, now seen corresponding path program 1 times [2022-11-03 02:15:54,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:54,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113269177] [2022-11-03 02:15:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:54,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:54,038 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:54,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:15:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:54,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:55,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:55,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113269177] [2022-11-03 02:15:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113269177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:55,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:55,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139655488] [2022-11-03 02:15:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:55,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:55,037 INFO L87 Difference]: Start difference. First operand 251 states and 348 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:55,894 INFO L93 Difference]: Finished difference Result 889 states and 1258 transitions. [2022-11-03 02:15:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:55,898 INFO L225 Difference]: With dead ends: 889 [2022-11-03 02:15:55,898 INFO L226 Difference]: Without dead ends: 664 [2022-11-03 02:15:55,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:55,899 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1948 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:55,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 1247 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:15:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-03 02:15:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 253. [2022-11-03 02:15:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.3888888888888888) internal successors, (350), 252 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 350 transitions. [2022-11-03 02:15:55,910 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 350 transitions. Word has length 222 [2022-11-03 02:15:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:55,910 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 350 transitions. [2022-11-03 02:15:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 350 transitions. [2022-11-03 02:15:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:55,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:55,912 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:55,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:56,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:56,136 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1538175267, now seen corresponding path program 1 times [2022-11-03 02:15:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:56,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808815887] [2022-11-03 02:15:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:56,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:56,139 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:56,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:15:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:57,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:57,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:57,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808815887] [2022-11-03 02:15:57,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808815887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:57,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:57,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:57,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739041565] [2022-11-03 02:15:57,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:57,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:57,164 INFO L87 Difference]: Start difference. First operand 253 states and 350 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:58,040 INFO L93 Difference]: Finished difference Result 893 states and 1261 transitions. [2022-11-03 02:15:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:15:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:15:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:58,042 INFO L225 Difference]: With dead ends: 893 [2022-11-03 02:15:58,043 INFO L226 Difference]: Without dead ends: 666 [2022-11-03 02:15:58,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:58,044 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1940 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:58,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 1253 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:15:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-03 02:15:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 255. [2022-11-03 02:15:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.3858267716535433) internal successors, (352), 254 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 352 transitions. [2022-11-03 02:15:58,055 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 352 transitions. Word has length 222 [2022-11-03 02:15:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:58,055 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 352 transitions. [2022-11-03 02:15:58,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 352 transitions. [2022-11-03 02:15:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:15:58,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:58,057 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:58,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:58,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:58,276 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1518634145, now seen corresponding path program 1 times [2022-11-03 02:15:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516612110] [2022-11-03 02:15:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:58,279 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:58,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:15:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:59,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:59,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:59,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:59,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516612110] [2022-11-03 02:15:59,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516612110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:59,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:59,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057014235] [2022-11-03 02:15:59,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:59,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:59,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:59,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:59,270 INFO L87 Difference]: Start difference. First operand 255 states and 352 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:00,091 INFO L93 Difference]: Finished difference Result 897 states and 1264 transitions. [2022-11-03 02:16:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:16:00,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:00,096 INFO L225 Difference]: With dead ends: 897 [2022-11-03 02:16:00,096 INFO L226 Difference]: Without dead ends: 668 [2022-11-03 02:16:00,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:16:00,097 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1932 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:00,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1932 Valid, 1259 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:16:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-11-03 02:16:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 257. [2022-11-03 02:16:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.3828125) internal successors, (354), 256 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 354 transitions. [2022-11-03 02:16:00,108 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 354 transitions. Word has length 222 [2022-11-03 02:16:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:00,108 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 354 transitions. [2022-11-03 02:16:00,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 354 transitions. [2022-11-03 02:16:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:00,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:00,110 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:00,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:00,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:00,324 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -991240095, now seen corresponding path program 1 times [2022-11-03 02:16:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:00,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206207112] [2022-11-03 02:16:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:00,327 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:00,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:16:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:01,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:01,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:01,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206207112] [2022-11-03 02:16:01,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206207112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:01,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:01,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:16:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268523778] [2022-11-03 02:16:01,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:01,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:16:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:16:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:16:01,253 INFO L87 Difference]: Start difference. First operand 257 states and 354 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:02,067 INFO L93 Difference]: Finished difference Result 901 states and 1267 transitions. [2022-11-03 02:16:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:16:02,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:02,069 INFO L225 Difference]: With dead ends: 901 [2022-11-03 02:16:02,069 INFO L226 Difference]: Without dead ends: 670 [2022-11-03 02:16:02,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:16:02,071 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1924 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:02,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 1265 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:16:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-11-03 02:16:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 259. [2022-11-03 02:16:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.37984496124031) internal successors, (356), 258 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 356 transitions. [2022-11-03 02:16:02,087 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 356 transitions. Word has length 222 [2022-11-03 02:16:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:02,087 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 356 transitions. [2022-11-03 02:16:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 356 transitions. [2022-11-03 02:16:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:02,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:02,089 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:02,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:02,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:02,311 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -342647325, now seen corresponding path program 1 times [2022-11-03 02:16:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:02,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538331286] [2022-11-03 02:16:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:02,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:02,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:02,314 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:02,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:16:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:03,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:03,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:03,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538331286] [2022-11-03 02:16:03,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538331286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:03,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:03,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905894816] [2022-11-03 02:16:03,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:03,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:03,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:03,279 INFO L87 Difference]: Start difference. First operand 259 states and 356 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:04,426 INFO L93 Difference]: Finished difference Result 919 states and 1289 transitions. [2022-11-03 02:16:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:04,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:04,428 INFO L225 Difference]: With dead ends: 919 [2022-11-03 02:16:04,429 INFO L226 Difference]: Without dead ends: 686 [2022-11-03 02:16:04,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:04,430 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 2204 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2204 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2204 Valid, 1735 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-03 02:16:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 263. [2022-11-03 02:16:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3778625954198473) internal successors, (361), 262 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 361 transitions. [2022-11-03 02:16:04,441 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 361 transitions. Word has length 222 [2022-11-03 02:16:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:04,441 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 361 transitions. [2022-11-03 02:16:04,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 361 transitions. [2022-11-03 02:16:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:04,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:04,443 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:04,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:04,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:04,660 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1750373275, now seen corresponding path program 1 times [2022-11-03 02:16:04,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:04,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133754296] [2022-11-03 02:16:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:04,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:04,662 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:04,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:16:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:05,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:05,688 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:05,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133754296] [2022-11-03 02:16:05,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133754296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:05,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:05,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584192439] [2022-11-03 02:16:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:05,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:05,691 INFO L87 Difference]: Start difference. First operand 263 states and 361 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:06,751 INFO L93 Difference]: Finished difference Result 929 states and 1300 transitions. [2022-11-03 02:16:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:06,755 INFO L225 Difference]: With dead ends: 929 [2022-11-03 02:16:06,755 INFO L226 Difference]: Without dead ends: 692 [2022-11-03 02:16:06,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:06,757 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 2199 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:06,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2199 Valid, 1742 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-11-03 02:16:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 265. [2022-11-03 02:16:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.375) internal successors, (363), 264 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 363 transitions. [2022-11-03 02:16:06,767 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 363 transitions. Word has length 222 [2022-11-03 02:16:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:06,768 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 363 transitions. [2022-11-03 02:16:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 363 transitions. [2022-11-03 02:16:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:06,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:06,770 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:06,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:06,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:06,991 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash 621343591, now seen corresponding path program 1 times [2022-11-03 02:16:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172035802] [2022-11-03 02:16:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:06,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:06,994 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:06,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:16:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:07,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:08,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:08,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172035802] [2022-11-03 02:16:08,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172035802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:08,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:08,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:08,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585183620] [2022-11-03 02:16:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:08,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:08,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:08,080 INFO L87 Difference]: Start difference. First operand 265 states and 363 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:09,152 INFO L93 Difference]: Finished difference Result 937 states and 1308 transitions. [2022-11-03 02:16:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:09,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:09,156 INFO L225 Difference]: With dead ends: 937 [2022-11-03 02:16:09,156 INFO L226 Difference]: Without dead ends: 698 [2022-11-03 02:16:09,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:09,157 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 2194 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:09,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2194 Valid, 1749 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-03 02:16:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 267. [2022-11-03 02:16:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.3721804511278195) internal successors, (365), 266 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 365 transitions. [2022-11-03 02:16:09,169 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 365 transitions. Word has length 222 [2022-11-03 02:16:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:09,169 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 365 transitions. [2022-11-03 02:16:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 365 transitions. [2022-11-03 02:16:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:09,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:09,171 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:09,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:09,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:09,396 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1119900393, now seen corresponding path program 1 times [2022-11-03 02:16:09,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:09,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214482591] [2022-11-03 02:16:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:09,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:09,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:09,398 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:09,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:16:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:10,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:10,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214482591] [2022-11-03 02:16:10,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214482591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:10,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:10,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522427713] [2022-11-03 02:16:10,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:10,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:10,484 INFO L87 Difference]: Start difference. First operand 267 states and 365 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:11,717 INFO L93 Difference]: Finished difference Result 945 states and 1316 transitions. [2022-11-03 02:16:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:11,720 INFO L225 Difference]: With dead ends: 945 [2022-11-03 02:16:11,720 INFO L226 Difference]: Without dead ends: 704 [2022-11-03 02:16:11,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:11,721 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 2189 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:11,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2189 Valid, 1756 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-03 02:16:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 269. [2022-11-03 02:16:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3694029850746268) internal successors, (367), 268 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 367 transitions. [2022-11-03 02:16:11,733 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 367 transitions. Word has length 222 [2022-11-03 02:16:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:11,733 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 367 transitions. [2022-11-03 02:16:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 367 transitions. [2022-11-03 02:16:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:11,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:11,736 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:11,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:11,953 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1771197717, now seen corresponding path program 1 times [2022-11-03 02:16:11,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852515924] [2022-11-03 02:16:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:11,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:11,957 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:11,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:16:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:13,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:13,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852515924] [2022-11-03 02:16:13,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852515924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:13,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:13,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475810720] [2022-11-03 02:16:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:13,006 INFO L87 Difference]: Start difference. First operand 269 states and 367 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:14,132 INFO L93 Difference]: Finished difference Result 953 states and 1324 transitions. [2022-11-03 02:16:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:14,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:14,134 INFO L225 Difference]: With dead ends: 953 [2022-11-03 02:16:14,134 INFO L226 Difference]: Without dead ends: 710 [2022-11-03 02:16:14,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:14,135 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 2184 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:14,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2184 Valid, 1763 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-03 02:16:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 271. [2022-11-03 02:16:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.3666666666666667) internal successors, (369), 270 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 369 transitions. [2022-11-03 02:16:14,148 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 369 transitions. Word has length 222 [2022-11-03 02:16:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:14,148 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 369 transitions. [2022-11-03 02:16:14,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 369 transitions. [2022-11-03 02:16:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:14,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:14,150 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:14,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 02:16:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:14,359 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1103815827, now seen corresponding path program 1 times [2022-11-03 02:16:14,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:14,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857126213] [2022-11-03 02:16:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:14,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:14,362 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:14,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:16:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:15,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:15,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857126213] [2022-11-03 02:16:15,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857126213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:15,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:15,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:15,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551660242] [2022-11-03 02:16:15,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:15,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:15,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:15,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:15,432 INFO L87 Difference]: Start difference. First operand 271 states and 369 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:16,532 INFO L93 Difference]: Finished difference Result 961 states and 1333 transitions. [2022-11-03 02:16:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:16,534 INFO L225 Difference]: With dead ends: 961 [2022-11-03 02:16:16,534 INFO L226 Difference]: Without dead ends: 716 [2022-11-03 02:16:16,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:16,535 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 2178 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:16,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 1771 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-11-03 02:16:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 273. [2022-11-03 02:16:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.3639705882352942) internal successors, (371), 272 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 371 transitions. [2022-11-03 02:16:16,546 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 371 transitions. Word has length 222 [2022-11-03 02:16:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:16,547 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 371 transitions. [2022-11-03 02:16:16,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 371 transitions. [2022-11-03 02:16:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:16,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:16,549 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:16,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:16:16,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:16,763 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash -758987665, now seen corresponding path program 1 times [2022-11-03 02:16:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719906200] [2022-11-03 02:16:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:16,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:16,766 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:16,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:16:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:17,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:17,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:17,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719906200] [2022-11-03 02:16:17,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719906200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:17,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:17,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433322869] [2022-11-03 02:16:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:17,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:17,781 INFO L87 Difference]: Start difference. First operand 273 states and 371 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:18,851 INFO L93 Difference]: Finished difference Result 969 states and 1341 transitions. [2022-11-03 02:16:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:18,855 INFO L225 Difference]: With dead ends: 969 [2022-11-03 02:16:18,855 INFO L226 Difference]: Without dead ends: 722 [2022-11-03 02:16:18,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:18,856 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 2173 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2173 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:18,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2173 Valid, 1778 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-03 02:16:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 275. [2022-11-03 02:16:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.3613138686131387) internal successors, (373), 274 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 373 transitions. [2022-11-03 02:16:18,867 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 373 transitions. Word has length 222 [2022-11-03 02:16:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:18,867 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 373 transitions. [2022-11-03 02:16:18,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 373 transitions. [2022-11-03 02:16:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:18,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:18,869 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:18,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:19,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:19,081 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1766508017, now seen corresponding path program 1 times [2022-11-03 02:16:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503082576] [2022-11-03 02:16:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:19,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:19,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:19,084 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:19,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:16:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:20,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:20,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503082576] [2022-11-03 02:16:20,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503082576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:20,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:20,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:20,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043631389] [2022-11-03 02:16:20,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:20,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:20,087 INFO L87 Difference]: Start difference. First operand 275 states and 373 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:21,163 INFO L93 Difference]: Finished difference Result 977 states and 1349 transitions. [2022-11-03 02:16:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:21,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:21,167 INFO L225 Difference]: With dead ends: 977 [2022-11-03 02:16:21,167 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 02:16:21,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:21,169 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 2168 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:21,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2168 Valid, 1785 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 02:16:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 277. [2022-11-03 02:16:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.358695652173913) internal successors, (375), 276 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 375 transitions. [2022-11-03 02:16:21,180 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 375 transitions. Word has length 222 [2022-11-03 02:16:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:21,180 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 375 transitions. [2022-11-03 02:16:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 375 transitions. [2022-11-03 02:16:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:21,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:21,182 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:21,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:16:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:21,395 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 361316339, now seen corresponding path program 1 times [2022-11-03 02:16:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293864368] [2022-11-03 02:16:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:21,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:21,398 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:21,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:16:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:22,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:22,419 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293864368] [2022-11-03 02:16:22,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293864368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:22,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:22,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:22,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267995383] [2022-11-03 02:16:22,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:22,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:22,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:22,422 INFO L87 Difference]: Start difference. First operand 277 states and 375 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:23,544 INFO L93 Difference]: Finished difference Result 991 states and 1365 transitions. [2022-11-03 02:16:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:23,547 INFO L225 Difference]: With dead ends: 991 [2022-11-03 02:16:23,547 INFO L226 Difference]: Without dead ends: 740 [2022-11-03 02:16:23,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:23,549 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 2162 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:23,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2162 Valid, 1801 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-03 02:16:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 281. [2022-11-03 02:16:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3571428571428572) internal successors, (380), 280 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 380 transitions. [2022-11-03 02:16:23,560 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 380 transitions. Word has length 222 [2022-11-03 02:16:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:23,560 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 380 transitions. [2022-11-03 02:16:23,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 380 transitions. [2022-11-03 02:16:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:23,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:23,562 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:23,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:23,778 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash 747178741, now seen corresponding path program 1 times [2022-11-03 02:16:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060697399] [2022-11-03 02:16:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:23,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:23,782 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:23,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:16:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:24,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:24,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060697399] [2022-11-03 02:16:24,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060697399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:24,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:24,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:16:24,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873103610] [2022-11-03 02:16:24,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:24,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:16:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:16:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:16:24,782 INFO L87 Difference]: Start difference. First operand 281 states and 380 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:25,658 INFO L93 Difference]: Finished difference Result 949 states and 1309 transitions. [2022-11-03 02:16:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:16:25,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:25,661 INFO L225 Difference]: With dead ends: 949 [2022-11-03 02:16:25,661 INFO L226 Difference]: Without dead ends: 694 [2022-11-03 02:16:25,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:16:25,663 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1834 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1834 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:25,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1834 Valid, 1341 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:16:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-03 02:16:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 283. [2022-11-03 02:16:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.3546099290780143) internal successors, (382), 282 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 382 transitions. [2022-11-03 02:16:25,673 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 382 transitions. Word has length 222 [2022-11-03 02:16:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:25,673 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 382 transitions. [2022-11-03 02:16:25,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 382 transitions. [2022-11-03 02:16:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:25,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:25,675 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:25,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:25,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:25,899 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1616662921, now seen corresponding path program 1 times [2022-11-03 02:16:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856132842] [2022-11-03 02:16:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:25,902 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:25,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:16:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:26,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:26,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:26,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:26,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856132842] [2022-11-03 02:16:26,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856132842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:26,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:26,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998525023] [2022-11-03 02:16:26,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:26,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:26,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:26,964 INFO L87 Difference]: Start difference. First operand 283 states and 382 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:28,044 INFO L93 Difference]: Finished difference Result 961 states and 1323 transitions. [2022-11-03 02:16:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:28,048 INFO L225 Difference]: With dead ends: 961 [2022-11-03 02:16:28,048 INFO L226 Difference]: Without dead ends: 704 [2022-11-03 02:16:28,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:28,049 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2105 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:28,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2105 Valid, 1802 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-03 02:16:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 285. [2022-11-03 02:16:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.352112676056338) internal successors, (384), 284 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 384 transitions. [2022-11-03 02:16:28,058 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 384 transitions. Word has length 222 [2022-11-03 02:16:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:28,058 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 384 transitions. [2022-11-03 02:16:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 384 transitions. [2022-11-03 02:16:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:28,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:28,060 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:28,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 02:16:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:28,260 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:28,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 280316537, now seen corresponding path program 1 times [2022-11-03 02:16:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130711250] [2022-11-03 02:16:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:28,263 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:28,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:16:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:29,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:29,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130711250] [2022-11-03 02:16:29,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130711250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:29,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:29,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513966647] [2022-11-03 02:16:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:29,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:29,276 INFO L87 Difference]: Start difference. First operand 285 states and 384 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:30,342 INFO L93 Difference]: Finished difference Result 969 states and 1331 transitions. [2022-11-03 02:16:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:30,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:30,344 INFO L225 Difference]: With dead ends: 969 [2022-11-03 02:16:30,344 INFO L226 Difference]: Without dead ends: 710 [2022-11-03 02:16:30,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:30,345 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 2100 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:30,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2100 Valid, 1809 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-03 02:16:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 287. [2022-11-03 02:16:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3496503496503496) internal successors, (386), 286 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 386 transitions. [2022-11-03 02:16:30,355 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 386 transitions. Word has length 222 [2022-11-03 02:16:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:30,356 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 386 transitions. [2022-11-03 02:16:30,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 386 transitions. [2022-11-03 02:16:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:30,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:30,358 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:30,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:16:30,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:30,581 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 706871035, now seen corresponding path program 1 times [2022-11-03 02:16:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:30,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748516373] [2022-11-03 02:16:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:30,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:30,584 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:30,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:16:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:31,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:31,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:31,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:31,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748516373] [2022-11-03 02:16:31,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748516373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:31,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:31,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369309660] [2022-11-03 02:16:31,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:31,610 INFO L87 Difference]: Start difference. First operand 287 states and 386 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:32,693 INFO L93 Difference]: Finished difference Result 977 states and 1339 transitions. [2022-11-03 02:16:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:32,696 INFO L225 Difference]: With dead ends: 977 [2022-11-03 02:16:32,696 INFO L226 Difference]: Without dead ends: 716 [2022-11-03 02:16:32,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:32,697 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 2095 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:32,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2095 Valid, 1816 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-11-03 02:16:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 289. [2022-11-03 02:16:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.3472222222222223) internal successors, (388), 288 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 388 transitions. [2022-11-03 02:16:32,708 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 388 transitions. Word has length 222 [2022-11-03 02:16:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:32,708 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 388 transitions. [2022-11-03 02:16:32,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 388 transitions. [2022-11-03 02:16:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:32,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:32,710 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:32,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:32,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:32,931 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 550890493, now seen corresponding path program 1 times [2022-11-03 02:16:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413380513] [2022-11-03 02:16:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:32,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:32,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:32,935 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:32,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:16:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:33,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:33,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:33,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:33,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413380513] [2022-11-03 02:16:33,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413380513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:33,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:33,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777945135] [2022-11-03 02:16:33,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:33,943 INFO L87 Difference]: Start difference. First operand 289 states and 388 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:35,042 INFO L93 Difference]: Finished difference Result 985 states and 1347 transitions. [2022-11-03 02:16:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:35,044 INFO L225 Difference]: With dead ends: 985 [2022-11-03 02:16:35,044 INFO L226 Difference]: Without dead ends: 722 [2022-11-03 02:16:35,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:35,045 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 2090 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 1823 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:35,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2090 Valid, 1823 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-03 02:16:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 291. [2022-11-03 02:16:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.3448275862068966) internal successors, (390), 290 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 390 transitions. [2022-11-03 02:16:35,055 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 390 transitions. Word has length 222 [2022-11-03 02:16:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:35,056 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 390 transitions. [2022-11-03 02:16:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 390 transitions. [2022-11-03 02:16:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:35,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:35,057 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:35,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 02:16:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:35,280 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1236979329, now seen corresponding path program 1 times [2022-11-03 02:16:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:35,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580203723] [2022-11-03 02:16:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:35,283 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:35,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:16:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:36,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:36,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580203723] [2022-11-03 02:16:36,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580203723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:36,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:36,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689361142] [2022-11-03 02:16:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:36,346 INFO L87 Difference]: Start difference. First operand 291 states and 390 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:37,464 INFO L93 Difference]: Finished difference Result 999 states and 1363 transitions. [2022-11-03 02:16:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:37,467 INFO L225 Difference]: With dead ends: 999 [2022-11-03 02:16:37,468 INFO L226 Difference]: Without dead ends: 734 [2022-11-03 02:16:37,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:37,468 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 2084 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:37,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2084 Valid, 1839 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-11-03 02:16:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 295. [2022-11-03 02:16:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.3435374149659864) internal successors, (395), 294 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 395 transitions. [2022-11-03 02:16:37,479 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 395 transitions. Word has length 222 [2022-11-03 02:16:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:37,479 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 395 transitions. [2022-11-03 02:16:37,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 395 transitions. [2022-11-03 02:16:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:37,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:37,482 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:37,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 02:16:37,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:37,695 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash 161974273, now seen corresponding path program 1 times [2022-11-03 02:16:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708108443] [2022-11-03 02:16:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:37,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:37,707 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:37,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:16:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:38,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:38,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:38,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708108443] [2022-11-03 02:16:38,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708108443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:38,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:38,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199038943] [2022-11-03 02:16:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:38,768 INFO L87 Difference]: Start difference. First operand 295 states and 395 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:39,876 INFO L93 Difference]: Finished difference Result 1009 states and 1375 transitions. [2022-11-03 02:16:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:39,879 INFO L225 Difference]: With dead ends: 1009 [2022-11-03 02:16:39,879 INFO L226 Difference]: Without dead ends: 740 [2022-11-03 02:16:39,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:39,881 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 2078 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:39,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2078 Valid, 1847 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-03 02:16:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 297. [2022-11-03 02:16:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.3412162162162162) internal successors, (397), 296 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 397 transitions. [2022-11-03 02:16:39,891 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 397 transitions. Word has length 222 [2022-11-03 02:16:39,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:39,891 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 397 transitions. [2022-11-03 02:16:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 397 transitions. [2022-11-03 02:16:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:39,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:39,893 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:39,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:40,116 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 525440771, now seen corresponding path program 1 times [2022-11-03 02:16:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:40,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743335914] [2022-11-03 02:16:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:40,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:40,119 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:40,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:16:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:40,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:41,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:41,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743335914] [2022-11-03 02:16:41,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743335914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:41,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:41,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:41,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276883657] [2022-11-03 02:16:41,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:41,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:41,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:41,165 INFO L87 Difference]: Start difference. First operand 297 states and 397 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:42,280 INFO L93 Difference]: Finished difference Result 1017 states and 1383 transitions. [2022-11-03 02:16:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:42,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:42,283 INFO L225 Difference]: With dead ends: 1017 [2022-11-03 02:16:42,283 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 02:16:42,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:42,284 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 2073 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:42,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 1854 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 02:16:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 299. [2022-11-03 02:16:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.3389261744966443) internal successors, (399), 298 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 399 transitions. [2022-11-03 02:16:42,292 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 399 transitions. Word has length 222 [2022-11-03 02:16:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:42,292 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 399 transitions. [2022-11-03 02:16:42,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 399 transitions. [2022-11-03 02:16:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:42,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:42,293 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:42,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 02:16:42,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:42,507 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash -19431803, now seen corresponding path program 1 times [2022-11-03 02:16:42,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622272765] [2022-11-03 02:16:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:42,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:42,510 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:42,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:16:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:43,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:43,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:43,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622272765] [2022-11-03 02:16:43,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622272765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:43,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:43,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:43,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973894655] [2022-11-03 02:16:43,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:43,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:43,602 INFO L87 Difference]: Start difference. First operand 299 states and 399 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:44,732 INFO L93 Difference]: Finished difference Result 1025 states and 1391 transitions. [2022-11-03 02:16:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:44,736 INFO L225 Difference]: With dead ends: 1025 [2022-11-03 02:16:44,736 INFO L226 Difference]: Without dead ends: 752 [2022-11-03 02:16:44,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:44,737 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 2068 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:44,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 1861 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-03 02:16:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 301. [2022-11-03 02:16:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.3366666666666667) internal successors, (401), 300 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 401 transitions. [2022-11-03 02:16:44,748 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 401 transitions. Word has length 222 [2022-11-03 02:16:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:44,748 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 401 transitions. [2022-11-03 02:16:44,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 401 transitions. [2022-11-03 02:16:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:44,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:44,750 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:44,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:16:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:44,964 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -967483769, now seen corresponding path program 1 times [2022-11-03 02:16:44,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:44,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552974402] [2022-11-03 02:16:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:44,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:44,967 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:44,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:16:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:46,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:46,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:46,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552974402] [2022-11-03 02:16:46,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552974402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:46,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:46,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888064421] [2022-11-03 02:16:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:46,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:46,029 INFO L87 Difference]: Start difference. First operand 301 states and 401 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:47,138 INFO L93 Difference]: Finished difference Result 1033 states and 1399 transitions. [2022-11-03 02:16:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:47,142 INFO L225 Difference]: With dead ends: 1033 [2022-11-03 02:16:47,142 INFO L226 Difference]: Without dead ends: 758 [2022-11-03 02:16:47,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:47,144 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 2063 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2063 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:47,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2063 Valid, 1868 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-11-03 02:16:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 303. [2022-11-03 02:16:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.3344370860927153) internal successors, (403), 302 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 403 transitions. [2022-11-03 02:16:47,155 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 403 transitions. Word has length 222 [2022-11-03 02:16:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:47,155 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 403 transitions. [2022-11-03 02:16:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 403 transitions. [2022-11-03 02:16:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:47,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:47,157 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:47,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:16:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:47,371 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1401989367, now seen corresponding path program 1 times [2022-11-03 02:16:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:47,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23051654] [2022-11-03 02:16:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:47,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:47,374 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:47,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:16:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:48,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:48,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23051654] [2022-11-03 02:16:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23051654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:48,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:48,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:48,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946095802] [2022-11-03 02:16:48,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:48,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:48,429 INFO L87 Difference]: Start difference. First operand 303 states and 403 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:49,538 INFO L93 Difference]: Finished difference Result 1041 states and 1407 transitions. [2022-11-03 02:16:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:49,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:49,541 INFO L225 Difference]: With dead ends: 1041 [2022-11-03 02:16:49,541 INFO L226 Difference]: Without dead ends: 764 [2022-11-03 02:16:49,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:49,543 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 2058 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:49,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2058 Valid, 1875 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-03 02:16:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 305. [2022-11-03 02:16:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.332236842105263) internal successors, (405), 304 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 405 transitions. [2022-11-03 02:16:49,553 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 405 transitions. Word has length 222 [2022-11-03 02:16:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:49,554 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 405 transitions. [2022-11-03 02:16:49,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 405 transitions. [2022-11-03 02:16:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:49,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:49,556 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:49,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:49,760 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2108585973, now seen corresponding path program 1 times [2022-11-03 02:16:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:49,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852956186] [2022-11-03 02:16:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:49,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:49,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:49,763 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:49,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:16:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:50,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:50,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852956186] [2022-11-03 02:16:50,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852956186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:50,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:50,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:16:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340052921] [2022-11-03 02:16:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:16:50,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:16:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:16:50,848 INFO L87 Difference]: Start difference. First operand 305 states and 405 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:51,750 INFO L93 Difference]: Finished difference Result 997 states and 1348 transitions. [2022-11-03 02:16:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:16:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:51,753 INFO L225 Difference]: With dead ends: 997 [2022-11-03 02:16:51,753 INFO L226 Difference]: Without dead ends: 718 [2022-11-03 02:16:51,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:16:51,754 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1741 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:51,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 1415 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:16:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-11-03 02:16:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 307. [2022-11-03 02:16:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.3300653594771241) internal successors, (407), 306 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 407 transitions. [2022-11-03 02:16:51,765 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 407 transitions. Word has length 222 [2022-11-03 02:16:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:51,766 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 407 transitions. [2022-11-03 02:16:51,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 407 transitions. [2022-11-03 02:16:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:51,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:51,767 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:51,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:51,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:51,991 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1246752371, now seen corresponding path program 1 times [2022-11-03 02:16:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:51,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156682521] [2022-11-03 02:16:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:51,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:51,993 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:16:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:53,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:53,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:53,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156682521] [2022-11-03 02:16:53,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156682521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:53,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:53,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857636546] [2022-11-03 02:16:53,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:53,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:53,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:53,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:53,039 INFO L87 Difference]: Start difference. First operand 307 states and 407 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:54,146 INFO L93 Difference]: Finished difference Result 1009 states and 1362 transitions. [2022-11-03 02:16:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:54,149 INFO L225 Difference]: With dead ends: 1009 [2022-11-03 02:16:54,149 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 02:16:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:54,150 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 2001 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:54,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2001 Valid, 1876 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 02:16:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 309. [2022-11-03 02:16:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.327922077922078) internal successors, (409), 308 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 409 transitions. [2022-11-03 02:16:54,162 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 409 transitions. Word has length 222 [2022-11-03 02:16:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:54,162 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 409 transitions. [2022-11-03 02:16:54,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 409 transitions. [2022-11-03 02:16:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:54,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:54,164 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:54,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:54,384 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash -758705265, now seen corresponding path program 1 times [2022-11-03 02:16:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:54,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364293438] [2022-11-03 02:16:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:54,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:54,386 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:54,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:16:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:55,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:55,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:55,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364293438] [2022-11-03 02:16:55,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364293438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:55,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:55,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040199575] [2022-11-03 02:16:55,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:55,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:55,548 INFO L87 Difference]: Start difference. First operand 309 states and 409 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:56,708 INFO L93 Difference]: Finished difference Result 1023 states and 1378 transitions. [2022-11-03 02:16:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:56,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:56,710 INFO L225 Difference]: With dead ends: 1023 [2022-11-03 02:16:56,710 INFO L226 Difference]: Without dead ends: 740 [2022-11-03 02:16:56,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:56,711 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1995 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1995 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:56,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1995 Valid, 1892 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-03 02:16:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 313. [2022-11-03 02:16:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.3269230769230769) internal successors, (414), 312 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 414 transitions. [2022-11-03 02:16:56,721 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 414 transitions. Word has length 222 [2022-11-03 02:16:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:56,721 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 414 transitions. [2022-11-03 02:16:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 414 transitions. [2022-11-03 02:16:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:56,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:56,723 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:56,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:56,928 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1814259345, now seen corresponding path program 1 times [2022-11-03 02:16:56,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:56,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884988732] [2022-11-03 02:16:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:56,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:56,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:56,931 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:56,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:16:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:16:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:58,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:58,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:58,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884988732] [2022-11-03 02:16:58,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884988732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:58,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:58,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:58,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546592168] [2022-11-03 02:16:58,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:58,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:58,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:58,091 INFO L87 Difference]: Start difference. First operand 313 states and 414 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:59,206 INFO L93 Difference]: Finished difference Result 1033 states and 1389 transitions. [2022-11-03 02:16:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:16:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:59,207 INFO L225 Difference]: With dead ends: 1033 [2022-11-03 02:16:59,207 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 02:16:59,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:59,208 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1990 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:59,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1990 Valid, 1899 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 02:16:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 315. [2022-11-03 02:16:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.3248407643312101) internal successors, (416), 314 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2022-11-03 02:16:59,217 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 416 transitions. Word has length 222 [2022-11-03 02:16:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:59,218 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-11-03 02:16:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 416 transitions. [2022-11-03 02:16:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:16:59,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:59,220 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:59,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:59,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:59,426 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:59,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:59,427 INFO L85 PathProgramCache]: Analyzing trace with hash -551775725, now seen corresponding path program 1 times [2022-11-03 02:16:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:59,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881233610] [2022-11-03 02:16:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:59,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:59,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:59,430 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:59,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:17:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:00,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:00,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:00,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:00,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:00,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881233610] [2022-11-03 02:17:00,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881233610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:00,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:00,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896536871] [2022-11-03 02:17:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:00,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:00,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:00,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:00,525 INFO L87 Difference]: Start difference. First operand 315 states and 416 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:01,645 INFO L93 Difference]: Finished difference Result 1041 states and 1397 transitions. [2022-11-03 02:17:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:01,647 INFO L225 Difference]: With dead ends: 1041 [2022-11-03 02:17:01,647 INFO L226 Difference]: Without dead ends: 752 [2022-11-03 02:17:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:01,648 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1985 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1985 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:01,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1985 Valid, 1906 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-03 02:17:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 317. [2022-11-03 02:17:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 316 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 418 transitions. [2022-11-03 02:17:01,658 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 418 transitions. Word has length 222 [2022-11-03 02:17:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:01,659 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 418 transitions. [2022-11-03 02:17:01,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 418 transitions. [2022-11-03 02:17:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:01,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:01,661 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:01,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:01,867 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1175369237, now seen corresponding path program 1 times [2022-11-03 02:17:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643138266] [2022-11-03 02:17:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:01,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:01,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:01,870 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:01,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:17:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:02,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:02,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643138266] [2022-11-03 02:17:02,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643138266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:02,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:02,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:02,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843824725] [2022-11-03 02:17:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:02,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:02,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:02,979 INFO L87 Difference]: Start difference. First operand 317 states and 418 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:04,104 INFO L93 Difference]: Finished difference Result 1049 states and 1405 transitions. [2022-11-03 02:17:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:04,105 INFO L225 Difference]: With dead ends: 1049 [2022-11-03 02:17:04,106 INFO L226 Difference]: Without dead ends: 758 [2022-11-03 02:17:04,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:04,107 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1980 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:04,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1980 Valid, 1913 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-11-03 02:17:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 319. [2022-11-03 02:17:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.320754716981132) internal successors, (420), 318 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 420 transitions. [2022-11-03 02:17:04,118 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 420 transitions. Word has length 222 [2022-11-03 02:17:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:04,119 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 420 transitions. [2022-11-03 02:17:04,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 420 transitions. [2022-11-03 02:17:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:04,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:04,120 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:04,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:04,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:04,343 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash -471993705, now seen corresponding path program 1 times [2022-11-03 02:17:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:04,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800513898] [2022-11-03 02:17:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:04,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:04,346 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:04,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:17:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:05,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:05,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:05,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:05,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:05,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800513898] [2022-11-03 02:17:05,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800513898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:05,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:05,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467450258] [2022-11-03 02:17:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:05,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:05,497 INFO L87 Difference]: Start difference. First operand 319 states and 420 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:06,635 INFO L93 Difference]: Finished difference Result 1057 states and 1414 transitions. [2022-11-03 02:17:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:06,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:06,641 INFO L225 Difference]: With dead ends: 1057 [2022-11-03 02:17:06,641 INFO L226 Difference]: Without dead ends: 764 [2022-11-03 02:17:06,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:06,642 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 1974 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:06,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1974 Valid, 1921 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-03 02:17:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 321. [2022-11-03 02:17:06,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.31875) internal successors, (422), 320 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 422 transitions. [2022-11-03 02:17:06,652 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 422 transitions. Word has length 222 [2022-11-03 02:17:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:06,652 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 422 transitions. [2022-11-03 02:17:06,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 422 transitions. [2022-11-03 02:17:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:06,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:06,654 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:06,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:06,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:06,876 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1510578279, now seen corresponding path program 1 times [2022-11-03 02:17:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:06,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544073597] [2022-11-03 02:17:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:06,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:06,880 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:06,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:17:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:07,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:08,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:08,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:08,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544073597] [2022-11-03 02:17:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544073597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:08,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:08,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:08,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604398378] [2022-11-03 02:17:08,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:08,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:08,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:08,018 INFO L87 Difference]: Start difference. First operand 321 states and 422 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:09,191 INFO L93 Difference]: Finished difference Result 1065 states and 1422 transitions. [2022-11-03 02:17:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:09,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:09,193 INFO L225 Difference]: With dead ends: 1065 [2022-11-03 02:17:09,193 INFO L226 Difference]: Without dead ends: 770 [2022-11-03 02:17:09,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:09,194 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1969 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1969 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:09,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1969 Valid, 1928 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-11-03 02:17:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 323. [2022-11-03 02:17:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.3167701863354038) internal successors, (424), 322 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 424 transitions. [2022-11-03 02:17:09,203 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 424 transitions. Word has length 222 [2022-11-03 02:17:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:09,204 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 424 transitions. [2022-11-03 02:17:09,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 424 transitions. [2022-11-03 02:17:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:09,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:09,205 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:09,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:09,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:09,420 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 642528539, now seen corresponding path program 1 times [2022-11-03 02:17:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:09,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146288686] [2022-11-03 02:17:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:09,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:09,422 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:09,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:17:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:10,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:10,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:10,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146288686] [2022-11-03 02:17:10,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146288686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:10,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:10,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142344811] [2022-11-03 02:17:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:10,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:10,558 INFO L87 Difference]: Start difference. First operand 323 states and 424 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:11,722 INFO L93 Difference]: Finished difference Result 1079 states and 1438 transitions. [2022-11-03 02:17:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:11,723 INFO L225 Difference]: With dead ends: 1079 [2022-11-03 02:17:11,724 INFO L226 Difference]: Without dead ends: 782 [2022-11-03 02:17:11,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:11,724 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1963 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:11,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1963 Valid, 1944 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-11-03 02:17:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 327. [2022-11-03 02:17:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.3159509202453987) internal successors, (429), 326 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 429 transitions. [2022-11-03 02:17:11,736 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 429 transitions. Word has length 222 [2022-11-03 02:17:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:11,736 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 429 transitions. [2022-11-03 02:17:11,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 429 transitions. [2022-11-03 02:17:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:11,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:11,738 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:11,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:17:11,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:11,951 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1390865507, now seen corresponding path program 1 times [2022-11-03 02:17:11,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:11,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720503068] [2022-11-03 02:17:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:11,954 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:11,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:17:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:12,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:13,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:13,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:13,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720503068] [2022-11-03 02:17:13,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720503068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:13,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:13,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:13,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347511819] [2022-11-03 02:17:13,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:13,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:13,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:13,086 INFO L87 Difference]: Start difference. First operand 327 states and 429 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:14,253 INFO L93 Difference]: Finished difference Result 1089 states and 1449 transitions. [2022-11-03 02:17:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:14,255 INFO L225 Difference]: With dead ends: 1089 [2022-11-03 02:17:14,255 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:17:14,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:14,256 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1958 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:14,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1958 Valid, 1951 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:17:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 329. [2022-11-03 02:17:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.3140243902439024) internal successors, (431), 328 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 431 transitions. [2022-11-03 02:17:14,264 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 431 transitions. Word has length 222 [2022-11-03 02:17:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:14,265 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 431 transitions. [2022-11-03 02:17:14,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 431 transitions. [2022-11-03 02:17:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:14,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:14,266 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:14,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 02:17:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:14,466 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1596959391, now seen corresponding path program 1 times [2022-11-03 02:17:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:14,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249456862] [2022-11-03 02:17:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:14,469 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:14,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:17:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:15,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:15,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249456862] [2022-11-03 02:17:15,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249456862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:15,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:15,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:17:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694907925] [2022-11-03 02:17:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:17:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:17:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:17:15,595 INFO L87 Difference]: Start difference. First operand 329 states and 431 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:16,568 INFO L93 Difference]: Finished difference Result 1045 states and 1390 transitions. [2022-11-03 02:17:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:17:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:16,570 INFO L225 Difference]: With dead ends: 1045 [2022-11-03 02:17:16,570 INFO L226 Difference]: Without dead ends: 742 [2022-11-03 02:17:16,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:17:16,571 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1651 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:16,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1491 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:17:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-11-03 02:17:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 331. [2022-11-03 02:17:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.312121212121212) internal successors, (433), 330 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 433 transitions. [2022-11-03 02:17:16,578 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 433 transitions. Word has length 222 [2022-11-03 02:17:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:16,578 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 433 transitions. [2022-11-03 02:17:16,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 433 transitions. [2022-11-03 02:17:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:16,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:16,579 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:16,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:16,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:16,783 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1666967007, now seen corresponding path program 1 times [2022-11-03 02:17:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:16,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025511916] [2022-11-03 02:17:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:16,786 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:16,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:17:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:17,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:17,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:17,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:17,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025511916] [2022-11-03 02:17:17,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025511916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:17,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:17,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:17,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63357659] [2022-11-03 02:17:17,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:17,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:17,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:17,991 INFO L87 Difference]: Start difference. First operand 331 states and 433 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:19,161 INFO L93 Difference]: Finished difference Result 1057 states and 1404 transitions. [2022-11-03 02:17:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:19,163 INFO L225 Difference]: With dead ends: 1057 [2022-11-03 02:17:19,163 INFO L226 Difference]: Without dead ends: 752 [2022-11-03 02:17:19,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:19,164 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1901 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:19,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 1952 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-03 02:17:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 333. [2022-11-03 02:17:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.3102409638554218) internal successors, (435), 332 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 435 transitions. [2022-11-03 02:17:19,173 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 435 transitions. Word has length 222 [2022-11-03 02:17:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:19,173 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 435 transitions. [2022-11-03 02:17:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 435 transitions. [2022-11-03 02:17:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:19,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:19,175 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:19,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:19,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:19,381 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash -65895901, now seen corresponding path program 1 times [2022-11-03 02:17:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:19,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14428313] [2022-11-03 02:17:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:19,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:19,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:19,384 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:19,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:17:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:20,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:20,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:20,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14428313] [2022-11-03 02:17:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14428313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:20,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:20,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114196183] [2022-11-03 02:17:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:20,521 INFO L87 Difference]: Start difference. First operand 333 states and 435 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:21,699 INFO L93 Difference]: Finished difference Result 1065 states and 1412 transitions. [2022-11-03 02:17:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:21,701 INFO L225 Difference]: With dead ends: 1065 [2022-11-03 02:17:21,701 INFO L226 Difference]: Without dead ends: 758 [2022-11-03 02:17:21,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:21,702 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1896 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:21,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 1959 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-11-03 02:17:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 335. [2022-11-03 02:17:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.3083832335329342) internal successors, (437), 334 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 437 transitions. [2022-11-03 02:17:21,714 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 437 transitions. Word has length 222 [2022-11-03 02:17:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:21,715 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 437 transitions. [2022-11-03 02:17:21,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 437 transitions. [2022-11-03 02:17:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:21,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:21,716 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:21,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 02:17:21,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:21,940 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1285489317, now seen corresponding path program 1 times [2022-11-03 02:17:21,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:21,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145641437] [2022-11-03 02:17:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:21,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:21,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:21,944 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:21,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:17:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:23,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:23,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:23,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145641437] [2022-11-03 02:17:23,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145641437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:23,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:23,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667284852] [2022-11-03 02:17:23,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:23,317 INFO L87 Difference]: Start difference. First operand 335 states and 437 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:24,502 INFO L93 Difference]: Finished difference Result 1073 states and 1420 transitions. [2022-11-03 02:17:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:24,504 INFO L225 Difference]: With dead ends: 1073 [2022-11-03 02:17:24,504 INFO L226 Difference]: Without dead ends: 764 [2022-11-03 02:17:24,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:24,505 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1891 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:24,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1891 Valid, 1966 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-03 02:17:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 337. [2022-11-03 02:17:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.306547619047619) internal successors, (439), 336 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 439 transitions. [2022-11-03 02:17:24,513 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 439 transitions. Word has length 222 [2022-11-03 02:17:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:24,513 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 439 transitions. [2022-11-03 02:17:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 439 transitions. [2022-11-03 02:17:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:24,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:24,515 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:24,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 02:17:24,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:24,715 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 401980327, now seen corresponding path program 1 times [2022-11-03 02:17:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:24,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721932172] [2022-11-03 02:17:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:24,718 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:24,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:17:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:25,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:25,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721932172] [2022-11-03 02:17:25,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721932172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:25,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:25,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727397396] [2022-11-03 02:17:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:25,912 INFO L87 Difference]: Start difference. First operand 337 states and 439 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:27,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:27,112 INFO L93 Difference]: Finished difference Result 1081 states and 1428 transitions. [2022-11-03 02:17:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:27,114 INFO L225 Difference]: With dead ends: 1081 [2022-11-03 02:17:27,114 INFO L226 Difference]: Without dead ends: 770 [2022-11-03 02:17:27,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:27,115 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1886 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:27,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1886 Valid, 1973 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-11-03 02:17:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 339. [2022-11-03 02:17:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.3047337278106508) internal successors, (441), 338 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 441 transitions. [2022-11-03 02:17:27,124 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 441 transitions. Word has length 222 [2022-11-03 02:17:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:27,124 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 441 transitions. [2022-11-03 02:17:27,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 441 transitions. [2022-11-03 02:17:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:27,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:27,126 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:27,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 02:17:27,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:27,327 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1538601687, now seen corresponding path program 1 times [2022-11-03 02:17:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:27,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782342099] [2022-11-03 02:17:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:27,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:27,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:27,334 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:27,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:17:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:28,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:28,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:28,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782342099] [2022-11-03 02:17:28,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782342099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:28,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:28,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:28,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110612377] [2022-11-03 02:17:28,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:28,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:28,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:28,496 INFO L87 Difference]: Start difference. First operand 339 states and 441 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:29,717 INFO L93 Difference]: Finished difference Result 1089 states and 1436 transitions. [2022-11-03 02:17:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:29,719 INFO L225 Difference]: With dead ends: 1089 [2022-11-03 02:17:29,719 INFO L226 Difference]: Without dead ends: 776 [2022-11-03 02:17:29,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:29,719 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1881 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:29,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1881 Valid, 1980 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-03 02:17:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 341. [2022-11-03 02:17:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.3029411764705883) internal successors, (443), 340 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 443 transitions. [2022-11-03 02:17:29,728 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 443 transitions. Word has length 222 [2022-11-03 02:17:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:29,728 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 443 transitions. [2022-11-03 02:17:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 443 transitions. [2022-11-03 02:17:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:29,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:29,730 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:29,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:29,930 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1985632043, now seen corresponding path program 1 times [2022-11-03 02:17:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767329361] [2022-11-03 02:17:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:29,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:29,933 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:17:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:30,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:31,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:31,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:31,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767329361] [2022-11-03 02:17:31,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767329361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:31,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:31,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8791072] [2022-11-03 02:17:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:31,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:31,132 INFO L87 Difference]: Start difference. First operand 341 states and 443 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:32,348 INFO L93 Difference]: Finished difference Result 1103 states and 1453 transitions. [2022-11-03 02:17:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:32,350 INFO L225 Difference]: With dead ends: 1103 [2022-11-03 02:17:32,350 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:17:32,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:32,351 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 1874 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:32,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 1997 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:17:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 345. [2022-11-03 02:17:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.302325581395349) internal successors, (448), 344 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 448 transitions. [2022-11-03 02:17:32,362 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 448 transitions. Word has length 222 [2022-11-03 02:17:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:32,362 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 448 transitions. [2022-11-03 02:17:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 448 transitions. [2022-11-03 02:17:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:32,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:32,363 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:32,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:32,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:32,564 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash -432852435, now seen corresponding path program 1 times [2022-11-03 02:17:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:32,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231505619] [2022-11-03 02:17:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:32,568 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:32,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:17:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:33,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:33,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231505619] [2022-11-03 02:17:33,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231505619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:33,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:33,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301186382] [2022-11-03 02:17:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:33,734 INFO L87 Difference]: Start difference. First operand 345 states and 448 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:34,960 INFO L93 Difference]: Finished difference Result 1113 states and 1464 transitions. [2022-11-03 02:17:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:34,962 INFO L225 Difference]: With dead ends: 1113 [2022-11-03 02:17:34,962 INFO L226 Difference]: Without dead ends: 794 [2022-11-03 02:17:34,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:34,963 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1869 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1869 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:34,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1869 Valid, 2004 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-03 02:17:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 347. [2022-11-03 02:17:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.300578034682081) internal successors, (450), 346 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 450 transitions. [2022-11-03 02:17:34,978 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 450 transitions. Word has length 222 [2022-11-03 02:17:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:34,978 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 450 transitions. [2022-11-03 02:17:34,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 450 transitions. [2022-11-03 02:17:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:34,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:34,980 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:35,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:35,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:35,180 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:35,181 INFO L85 PathProgramCache]: Analyzing trace with hash 892003759, now seen corresponding path program 1 times [2022-11-03 02:17:35,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:35,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117227635] [2022-11-03 02:17:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:35,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:35,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:35,184 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:35,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:17:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:36,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:36,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117227635] [2022-11-03 02:17:36,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117227635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:36,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:36,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:36,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642357595] [2022-11-03 02:17:36,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:36,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:36,600 INFO L87 Difference]: Start difference. First operand 347 states and 450 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:37,796 INFO L93 Difference]: Finished difference Result 1121 states and 1472 transitions. [2022-11-03 02:17:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:37,798 INFO L225 Difference]: With dead ends: 1121 [2022-11-03 02:17:37,798 INFO L226 Difference]: Without dead ends: 800 [2022-11-03 02:17:37,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:37,798 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1864 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1864 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:37,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1864 Valid, 2011 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-03 02:17:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 349. [2022-11-03 02:17:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.2988505747126438) internal successors, (452), 348 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 452 transitions. [2022-11-03 02:17:37,805 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 452 transitions. Word has length 222 [2022-11-03 02:17:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:37,809 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 452 transitions. [2022-11-03 02:17:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 452 transitions. [2022-11-03 02:17:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:37,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:37,811 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:37,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 02:17:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:38,015 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash -165834319, now seen corresponding path program 1 times [2022-11-03 02:17:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462286920] [2022-11-03 02:17:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:38,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:38,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:38,018 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:38,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:17:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:38,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:38,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:39,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:39,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462286920] [2022-11-03 02:17:39,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462286920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:39,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:39,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286414407] [2022-11-03 02:17:39,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:39,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:39,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:39,185 INFO L87 Difference]: Start difference. First operand 349 states and 452 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:40,373 INFO L93 Difference]: Finished difference Result 1129 states and 1480 transitions. [2022-11-03 02:17:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:40,375 INFO L225 Difference]: With dead ends: 1129 [2022-11-03 02:17:40,375 INFO L226 Difference]: Without dead ends: 806 [2022-11-03 02:17:40,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:40,376 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1859 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:40,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1859 Valid, 2018 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-03 02:17:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 351. [2022-11-03 02:17:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.2971428571428572) internal successors, (454), 350 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 454 transitions. [2022-11-03 02:17:40,386 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 454 transitions. Word has length 222 [2022-11-03 02:17:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:40,386 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 454 transitions. [2022-11-03 02:17:40,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 454 transitions. [2022-11-03 02:17:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:40,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:40,388 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:40,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:17:40,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:40,588 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash 74405427, now seen corresponding path program 1 times [2022-11-03 02:17:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:40,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286484550] [2022-11-03 02:17:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:40,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:40,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:40,591 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:40,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:17:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:41,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:41,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286484550] [2022-11-03 02:17:41,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286484550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:41,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:41,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:41,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141792448] [2022-11-03 02:17:41,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:41,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:41,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:41,763 INFO L87 Difference]: Start difference. First operand 351 states and 454 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:42,965 INFO L93 Difference]: Finished difference Result 1137 states and 1488 transitions. [2022-11-03 02:17:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:42,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:42,967 INFO L225 Difference]: With dead ends: 1137 [2022-11-03 02:17:42,967 INFO L226 Difference]: Without dead ends: 812 [2022-11-03 02:17:42,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:42,968 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1854 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1854 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:42,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1854 Valid, 2025 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-03 02:17:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 353. [2022-11-03 02:17:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.2954545454545454) internal successors, (456), 352 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 456 transitions. [2022-11-03 02:17:42,978 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 456 transitions. Word has length 222 [2022-11-03 02:17:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:42,978 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 456 transitions. [2022-11-03 02:17:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 456 transitions. [2022-11-03 02:17:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:42,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:42,980 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:42,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:43,184 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 101471029, now seen corresponding path program 1 times [2022-11-03 02:17:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847790119] [2022-11-03 02:17:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:43,186 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 02:17:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:43,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:44,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:44,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:44,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847790119] [2022-11-03 02:17:44,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847790119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:44,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:44,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:17:44,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538129356] [2022-11-03 02:17:44,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:44,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:17:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:17:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:17:44,382 INFO L87 Difference]: Start difference. First operand 353 states and 456 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:45,447 INFO L93 Difference]: Finished difference Result 1093 states and 1429 transitions. [2022-11-03 02:17:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:17:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:45,449 INFO L225 Difference]: With dead ends: 1093 [2022-11-03 02:17:45,449 INFO L226 Difference]: Without dead ends: 766 [2022-11-03 02:17:45,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:17:45,450 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1558 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:45,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1558 Valid, 1565 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:17:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-03 02:17:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 355. [2022-11-03 02:17:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.2937853107344632) internal successors, (458), 354 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 458 transitions. [2022-11-03 02:17:45,462 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 458 transitions. Word has length 222 [2022-11-03 02:17:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:45,462 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 458 transitions. [2022-11-03 02:17:45,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 458 transitions. [2022-11-03 02:17:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:45,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:45,464 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:45,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 02:17:45,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:45,664 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1835575479, now seen corresponding path program 1 times [2022-11-03 02:17:45,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:45,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226348423] [2022-11-03 02:17:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:45,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:45,667 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:45,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:17:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:46,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:46,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226348423] [2022-11-03 02:17:46,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226348423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:46,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:46,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:46,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754300688] [2022-11-03 02:17:46,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:46,937 INFO L87 Difference]: Start difference. First operand 355 states and 458 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:48,230 INFO L93 Difference]: Finished difference Result 1111 states and 1451 transitions. [2022-11-03 02:17:48,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:48,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:48,232 INFO L225 Difference]: With dead ends: 1111 [2022-11-03 02:17:48,233 INFO L226 Difference]: Without dead ends: 782 [2022-11-03 02:17:48,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:48,234 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1796 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:48,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1796 Valid, 2035 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-11-03 02:17:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 359. [2022-11-03 02:17:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.2932960893854748) internal successors, (463), 358 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 463 transitions. [2022-11-03 02:17:48,246 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 463 transitions. Word has length 222 [2022-11-03 02:17:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:48,247 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 463 transitions. [2022-11-03 02:17:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 463 transitions. [2022-11-03 02:17:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:48,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:48,248 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:48,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:48,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:48,473 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash 868224825, now seen corresponding path program 1 times [2022-11-03 02:17:48,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:48,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425472046] [2022-11-03 02:17:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:48,475 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:17:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:49,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:49,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425472046] [2022-11-03 02:17:49,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425472046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:49,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:49,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132795611] [2022-11-03 02:17:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:49,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:49,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:49,731 INFO L87 Difference]: Start difference. First operand 359 states and 463 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:50,988 INFO L93 Difference]: Finished difference Result 1121 states and 1462 transitions. [2022-11-03 02:17:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:50,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:50,990 INFO L225 Difference]: With dead ends: 1121 [2022-11-03 02:17:50,991 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:17:50,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:50,992 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 1791 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1791 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:50,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1791 Valid, 2042 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:17:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 361. [2022-11-03 02:17:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.2916666666666667) internal successors, (465), 360 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2022-11-03 02:17:51,005 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 222 [2022-11-03 02:17:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:51,005 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2022-11-03 02:17:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2022-11-03 02:17:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:51,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:51,007 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:51,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 02:17:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:51,221 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 375598651, now seen corresponding path program 1 times [2022-11-03 02:17:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:51,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556331726] [2022-11-03 02:17:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:51,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:51,225 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:51,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:17:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:52,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:52,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:52,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:52,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556331726] [2022-11-03 02:17:52,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556331726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:52,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:52,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625817241] [2022-11-03 02:17:52,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:52,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:52,538 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:53,800 INFO L93 Difference]: Finished difference Result 1129 states and 1470 transitions. [2022-11-03 02:17:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:53,802 INFO L225 Difference]: With dead ends: 1129 [2022-11-03 02:17:53,802 INFO L226 Difference]: Without dead ends: 794 [2022-11-03 02:17:53,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:53,803 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 1786 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:53,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1786 Valid, 2049 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-03 02:17:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 363. [2022-11-03 02:17:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.2900552486187846) internal successors, (467), 362 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 467 transitions. [2022-11-03 02:17:53,813 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 467 transitions. Word has length 222 [2022-11-03 02:17:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:53,813 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 467 transitions. [2022-11-03 02:17:53,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 467 transitions. [2022-11-03 02:17:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:53,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:53,815 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:53,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:54,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:54,015 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash -840555075, now seen corresponding path program 1 times [2022-11-03 02:17:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:54,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530716023] [2022-11-03 02:17:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:54,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:54,018 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:54,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:17:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:54,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:55,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:55,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:55,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530716023] [2022-11-03 02:17:55,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530716023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:55,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:55,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:55,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761008702] [2022-11-03 02:17:55,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:55,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:55,256 INFO L87 Difference]: Start difference. First operand 363 states and 467 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:56,512 INFO L93 Difference]: Finished difference Result 1137 states and 1478 transitions. [2022-11-03 02:17:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:56,514 INFO L225 Difference]: With dead ends: 1137 [2022-11-03 02:17:56,514 INFO L226 Difference]: Without dead ends: 800 [2022-11-03 02:17:56,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:56,515 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 1781 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 2056 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:56,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1781 Valid, 2056 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-03 02:17:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 365. [2022-11-03 02:17:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.2884615384615385) internal successors, (469), 364 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 469 transitions. [2022-11-03 02:17:56,522 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 469 transitions. Word has length 222 [2022-11-03 02:17:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:56,523 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 469 transitions. [2022-11-03 02:17:56,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 469 transitions. [2022-11-03 02:17:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:56,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:56,525 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:56,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 02:17:56,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:56,731 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1768232383, now seen corresponding path program 1 times [2022-11-03 02:17:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:56,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113057948] [2022-11-03 02:17:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:56,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:56,735 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:56,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:17:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:57,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:17:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:58,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:58,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:58,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113057948] [2022-11-03 02:17:58,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113057948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:58,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:58,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240359269] [2022-11-03 02:17:58,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:58,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:58,013 INFO L87 Difference]: Start difference. First operand 365 states and 469 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:59,294 INFO L93 Difference]: Finished difference Result 1145 states and 1486 transitions. [2022-11-03 02:17:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:17:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:59,297 INFO L225 Difference]: With dead ends: 1145 [2022-11-03 02:17:59,297 INFO L226 Difference]: Without dead ends: 806 [2022-11-03 02:17:59,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:59,298 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1776 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:59,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1776 Valid, 2063 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:17:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-03 02:17:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 367. [2022-11-03 02:17:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.2868852459016393) internal successors, (471), 366 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 471 transitions. [2022-11-03 02:17:59,317 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 471 transitions. Word has length 222 [2022-11-03 02:17:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:59,318 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 471 transitions. [2022-11-03 02:17:59,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 471 transitions. [2022-11-03 02:17:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:17:59,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:59,319 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:59,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 02:17:59,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:59,535 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1350835777, now seen corresponding path program 1 times [2022-11-03 02:17:59,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:59,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673294367] [2022-11-03 02:17:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:59,538 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:59,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:18:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:00,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:18:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:00,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:00,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:00,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673294367] [2022-11-03 02:18:00,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673294367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:00,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:00,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:18:00,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445609117] [2022-11-03 02:18:00,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:00,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:18:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:18:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:00,809 INFO L87 Difference]: Start difference. First operand 367 states and 471 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:02,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:02,128 INFO L93 Difference]: Finished difference Result 1153 states and 1495 transitions. [2022-11-03 02:18:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:18:02,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:02,132 INFO L225 Difference]: With dead ends: 1153 [2022-11-03 02:18:02,132 INFO L226 Difference]: Without dead ends: 812 [2022-11-03 02:18:02,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:18:02,133 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 1770 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:02,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1770 Valid, 2071 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:18:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-03 02:18:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 369. [2022-11-03 02:18:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.2853260869565217) internal successors, (473), 368 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 473 transitions. [2022-11-03 02:18:02,146 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 473 transitions. Word has length 222 [2022-11-03 02:18:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 473 transitions. [2022-11-03 02:18:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 473 transitions. [2022-11-03 02:18:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:02,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:02,148 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:02,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:02,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:02,367 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash -982556861, now seen corresponding path program 1 times [2022-11-03 02:18:02,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:02,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860930740] [2022-11-03 02:18:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:02,369 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:02,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:18:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:18:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:03,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:03,621 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860930740] [2022-11-03 02:18:03,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860930740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:03,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:03,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:18:03,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900684385] [2022-11-03 02:18:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:03,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:18:03,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:18:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:03,622 INFO L87 Difference]: Start difference. First operand 369 states and 473 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:04,906 INFO L93 Difference]: Finished difference Result 1161 states and 1503 transitions. [2022-11-03 02:18:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:18:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:04,908 INFO L225 Difference]: With dead ends: 1161 [2022-11-03 02:18:04,908 INFO L226 Difference]: Without dead ends: 818 [2022-11-03 02:18:04,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:18:04,908 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 1765 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:04,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 2078 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:18:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-11-03 02:18:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 371. [2022-11-03 02:18:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.2837837837837838) internal successors, (475), 370 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 475 transitions. [2022-11-03 02:18:04,916 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 475 transitions. Word has length 222 [2022-11-03 02:18:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:04,916 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 475 transitions. [2022-11-03 02:18:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 475 transitions. [2022-11-03 02:18:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:04,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:04,917 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:04,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:05,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:05,118 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -421857083, now seen corresponding path program 1 times [2022-11-03 02:18:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121968736] [2022-11-03 02:18:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:05,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:05,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:05,121 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:05,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:18:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:18:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:06,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:06,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:06,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121968736] [2022-11-03 02:18:06,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121968736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:06,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:06,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:18:06,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579656405] [2022-11-03 02:18:06,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:06,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:18:06,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:18:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:06,385 INFO L87 Difference]: Start difference. First operand 371 states and 475 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:07,672 INFO L93 Difference]: Finished difference Result 1169 states and 1511 transitions. [2022-11-03 02:18:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:18:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:07,674 INFO L225 Difference]: With dead ends: 1169 [2022-11-03 02:18:07,675 INFO L226 Difference]: Without dead ends: 824 [2022-11-03 02:18:07,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:18:07,677 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 1760 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:07,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1760 Valid, 2085 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:18:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-03 02:18:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 373. [2022-11-03 02:18:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.282258064516129) internal successors, (477), 372 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 477 transitions. [2022-11-03 02:18:07,706 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 477 transitions. Word has length 222 [2022-11-03 02:18:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:07,706 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 477 transitions. [2022-11-03 02:18:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 477 transitions. [2022-11-03 02:18:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:07,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:07,708 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:07,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 02:18:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:07,924 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 839060167, now seen corresponding path program 1 times [2022-11-03 02:18:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282466252] [2022-11-03 02:18:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:07,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:07,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:07,927 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:07,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 02:18:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:18:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:09,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:09,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282466252] [2022-11-03 02:18:09,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282466252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:09,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:09,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:18:09,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012015973] [2022-11-03 02:18:09,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:09,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:18:09,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:18:09,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:09,181 INFO L87 Difference]: Start difference. First operand 373 states and 477 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:10,465 INFO L93 Difference]: Finished difference Result 1183 states and 1527 transitions. [2022-11-03 02:18:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:18:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:10,467 INFO L225 Difference]: With dead ends: 1183 [2022-11-03 02:18:10,467 INFO L226 Difference]: Without dead ends: 836 [2022-11-03 02:18:10,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:18:10,468 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1754 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:10,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 2101 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:18:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-03 02:18:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 377. [2022-11-03 02:18:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.2819148936170213) internal successors, (482), 376 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 482 transitions. [2022-11-03 02:18:10,480 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 482 transitions. Word has length 222 [2022-11-03 02:18:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:10,481 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 482 transitions. [2022-11-03 02:18:10,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 482 transitions. [2022-11-03 02:18:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:10,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:10,482 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:10,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 02:18:10,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:10,683 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:10,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1282960841, now seen corresponding path program 1 times [2022-11-03 02:18:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:10,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333652268] [2022-11-03 02:18:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:10,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:10,685 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:10,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 02:18:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:18:11,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:11,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:11,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333652268] [2022-11-03 02:18:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333652268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:11,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:11,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640511114] [2022-11-03 02:18:11,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:11,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:11,896 INFO L87 Difference]: Start difference. First operand 377 states and 482 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:12,887 INFO L93 Difference]: Finished difference Result 2316 states and 2982 transitions. [2022-11-03 02:18:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:18:12,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:12,890 INFO L225 Difference]: With dead ends: 2316 [2022-11-03 02:18:12,890 INFO L226 Difference]: Without dead ends: 1965 [2022-11-03 02:18:12,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:18:12,891 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 2767 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:12,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2767 Valid, 1652 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:18:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-03 02:18:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 675. [2022-11-03 02:18:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.2833827893175074) internal successors, (865), 674 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 865 transitions. [2022-11-03 02:18:12,909 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 865 transitions. Word has length 222 [2022-11-03 02:18:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:12,910 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 865 transitions. [2022-11-03 02:18:12,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 865 transitions. [2022-11-03 02:18:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:12,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:12,912 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:12,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:13,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:13,132 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1267442123, now seen corresponding path program 1 times [2022-11-03 02:18:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:13,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886467694] [2022-11-03 02:18:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:13,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:13,136 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:13,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:18:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:18:13,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:14,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:14,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886467694] [2022-11-03 02:18:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886467694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:14,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:14,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:14,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828087407] [2022-11-03 02:18:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:14,767 INFO L87 Difference]: Start difference. First operand 675 states and 865 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:15,411 INFO L93 Difference]: Finished difference Result 3061 states and 3907 transitions. [2022-11-03 02:18:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:15,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:15,415 INFO L225 Difference]: With dead ends: 3061 [2022-11-03 02:18:15,416 INFO L226 Difference]: Without dead ends: 2412 [2022-11-03 02:18:15,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:15,417 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1005 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:15,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 1458 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-11-03 02:18:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1123. [2022-11-03 02:18:15,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.2557932263814617) internal successors, (1409), 1122 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1409 transitions. [2022-11-03 02:18:15,440 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1409 transitions. Word has length 222 [2022-11-03 02:18:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:15,440 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1409 transitions. [2022-11-03 02:18:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1409 transitions. [2022-11-03 02:18:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:15,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:15,442 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:15,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:15,655 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash 914353741, now seen corresponding path program 1 times [2022-11-03 02:18:15,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:15,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57431090] [2022-11-03 02:18:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:15,658 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:15,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:18:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:16,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:16,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:17,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:17,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:17,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57431090] [2022-11-03 02:18:17,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57431090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:17,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:17,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:17,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256920990] [2022-11-03 02:18:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:17,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:17,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:17,029 INFO L87 Difference]: Start difference. First operand 1123 states and 1409 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:17,911 INFO L93 Difference]: Finished difference Result 3061 states and 3906 transitions. [2022-11-03 02:18:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:17,913 INFO L225 Difference]: With dead ends: 3061 [2022-11-03 02:18:17,913 INFO L226 Difference]: Without dead ends: 2412 [2022-11-03 02:18:17,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:17,914 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 997 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:17,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 1298 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:18:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-11-03 02:18:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1125. [2022-11-03 02:18:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 1.2553380782918149) internal successors, (1411), 1124 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1411 transitions. [2022-11-03 02:18:17,931 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1411 transitions. Word has length 222 [2022-11-03 02:18:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:17,931 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1411 transitions. [2022-11-03 02:18:17,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1411 transitions. [2022-11-03 02:18:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:17,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:17,933 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:17,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 02:18:18,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:18,133 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1807840079, now seen corresponding path program 1 times [2022-11-03 02:18:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:18,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900810667] [2022-11-03 02:18:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:18,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:18,136 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:18,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 02:18:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:18:18,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:19,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:19,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900810667] [2022-11-03 02:18:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900810667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:19,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:19,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:19,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897298057] [2022-11-03 02:18:19,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:19,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:19,464 INFO L87 Difference]: Start difference. First operand 1125 states and 1411 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:20,094 INFO L93 Difference]: Finished difference Result 3074 states and 3924 transitions. [2022-11-03 02:18:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:20,096 INFO L225 Difference]: With dead ends: 3074 [2022-11-03 02:18:20,096 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 02:18:20,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:20,097 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 998 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:20,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 1451 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 02:18:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1131. [2022-11-03 02:18:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.2557522123893805) internal successors, (1419), 1130 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1419 transitions. [2022-11-03 02:18:20,116 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1419 transitions. Word has length 222 [2022-11-03 02:18:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:20,116 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1419 transitions. [2022-11-03 02:18:20,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1419 transitions. [2022-11-03 02:18:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:20,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:20,118 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:20,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:20,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:20,319 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash -37527087, now seen corresponding path program 1 times [2022-11-03 02:18:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367081070] [2022-11-03 02:18:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:20,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:20,322 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:20,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:18:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:18:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:21,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:21,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367081070] [2022-11-03 02:18:21,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367081070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:21,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:21,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953775719] [2022-11-03 02:18:21,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:21,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:21,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:21,605 INFO L87 Difference]: Start difference. First operand 1131 states and 1419 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:22,231 INFO L93 Difference]: Finished difference Result 3074 states and 3923 transitions. [2022-11-03 02:18:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:22,234 INFO L225 Difference]: With dead ends: 3074 [2022-11-03 02:18:22,234 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 02:18:22,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:22,235 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 991 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:22,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1450 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 02:18:22,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1133. [2022-11-03 02:18:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 1.2553003533568905) internal successors, (1421), 1132 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1421 transitions. [2022-11-03 02:18:22,248 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1421 transitions. Word has length 222 [2022-11-03 02:18:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:22,248 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1421 transitions. [2022-11-03 02:18:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1421 transitions. [2022-11-03 02:18:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:22,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:22,250 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:22,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:18:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:22,455 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 622004435, now seen corresponding path program 1 times [2022-11-03 02:18:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:22,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059957755] [2022-11-03 02:18:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:22,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:22,458 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:22,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 02:18:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:18:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:23,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:23,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:23,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059957755] [2022-11-03 02:18:23,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059957755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:23,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:23,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142001633] [2022-11-03 02:18:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:23,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:23,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:23,766 INFO L87 Difference]: Start difference. First operand 1133 states and 1421 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:24,386 INFO L93 Difference]: Finished difference Result 3074 states and 3922 transitions. [2022-11-03 02:18:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:24,388 INFO L225 Difference]: With dead ends: 3074 [2022-11-03 02:18:24,388 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 02:18:24,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:24,389 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 984 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1443 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:24,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1443 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 02:18:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1135. [2022-11-03 02:18:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.2548500881834215) internal successors, (1423), 1134 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1423 transitions. [2022-11-03 02:18:24,406 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1423 transitions. Word has length 222 [2022-11-03 02:18:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:24,406 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1423 transitions. [2022-11-03 02:18:24,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1423 transitions. [2022-11-03 02:18:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:24,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:24,407 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:24,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 02:18:24,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:24,608 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -222001067, now seen corresponding path program 1 times [2022-11-03 02:18:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:24,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957755889] [2022-11-03 02:18:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:24,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:24,610 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:24,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:18:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:18:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:25,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957755889] [2022-11-03 02:18:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957755889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:25,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:25,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120351065] [2022-11-03 02:18:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:25,898 INFO L87 Difference]: Start difference. First operand 1135 states and 1423 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:26,561 INFO L93 Difference]: Finished difference Result 3074 states and 3921 transitions. [2022-11-03 02:18:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:26,563 INFO L225 Difference]: With dead ends: 3074 [2022-11-03 02:18:26,563 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 02:18:26,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:26,564 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 977 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:26,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 1439 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 02:18:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1137. [2022-11-03 02:18:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.2544014084507042) internal successors, (1425), 1136 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1425 transitions. [2022-11-03 02:18:26,578 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1425 transitions. Word has length 222 [2022-11-03 02:18:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:26,578 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1425 transitions. [2022-11-03 02:18:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1425 transitions. [2022-11-03 02:18:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:26,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:26,580 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:26,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 02:18:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:26,787 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash -294387625, now seen corresponding path program 1 times [2022-11-03 02:18:26,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:26,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23972956] [2022-11-03 02:18:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:26,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:26,790 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:26,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 02:18:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:18:27,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:28,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:28,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23972956] [2022-11-03 02:18:28,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23972956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:28,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:28,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954687293] [2022-11-03 02:18:28,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:28,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:28,127 INFO L87 Difference]: Start difference. First operand 1137 states and 1425 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:28,744 INFO L93 Difference]: Finished difference Result 3074 states and 3920 transitions. [2022-11-03 02:18:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:28,747 INFO L225 Difference]: With dead ends: 3074 [2022-11-03 02:18:28,747 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 02:18:28,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:28,748 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 970 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:28,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1438 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 02:18:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1139. [2022-11-03 02:18:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.2539543057996485) internal successors, (1427), 1138 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1427 transitions. [2022-11-03 02:18:28,768 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1427 transitions. Word has length 222 [2022-11-03 02:18:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:28,769 INFO L495 AbstractCegarLoop]: Abstraction has 1139 states and 1427 transitions. [2022-11-03 02:18:28,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1427 transitions. [2022-11-03 02:18:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:28,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:28,771 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:28,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 02:18:28,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:28,984 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:28,984 INFO L85 PathProgramCache]: Analyzing trace with hash 407212249, now seen corresponding path program 1 times [2022-11-03 02:18:28,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:28,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857521939] [2022-11-03 02:18:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:28,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:28,988 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:29,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 02:18:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:18:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:30,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:30,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:30,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857521939] [2022-11-03 02:18:30,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857521939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:30,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:30,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:30,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373278052] [2022-11-03 02:18:30,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:30,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:30,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:30,268 INFO L87 Difference]: Start difference. First operand 1139 states and 1427 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:30,894 INFO L93 Difference]: Finished difference Result 3074 states and 3919 transitions. [2022-11-03 02:18:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:30,896 INFO L225 Difference]: With dead ends: 3074 [2022-11-03 02:18:30,896 INFO L226 Difference]: Without dead ends: 2425 [2022-11-03 02:18:30,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:30,897 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 963 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:30,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 1437 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-11-03 02:18:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1141. [2022-11-03 02:18:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 1.2535087719298246) internal successors, (1429), 1140 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1429 transitions. [2022-11-03 02:18:30,910 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1429 transitions. Word has length 222 [2022-11-03 02:18:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:30,910 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1429 transitions. [2022-11-03 02:18:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1429 transitions. [2022-11-03 02:18:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:30,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:30,911 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:30,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 02:18:31,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:31,115 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1793415643, now seen corresponding path program 1 times [2022-11-03 02:18:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831747294] [2022-11-03 02:18:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:31,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:31,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:31,118 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:31,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 02:18:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:31,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:18:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:34,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:34,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:34,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831747294] [2022-11-03 02:18:34,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831747294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:34,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:34,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:34,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745068114] [2022-11-03 02:18:34,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:34,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:34,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:34,205 INFO L87 Difference]: Start difference. First operand 1141 states and 1429 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:35,568 INFO L93 Difference]: Finished difference Result 3120 states and 3976 transitions. [2022-11-03 02:18:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:18:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:35,571 INFO L225 Difference]: With dead ends: 3120 [2022-11-03 02:18:35,571 INFO L226 Difference]: Without dead ends: 2471 [2022-11-03 02:18:35,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:18:35,577 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1132 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:35,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 2255 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:18:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-11-03 02:18:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1167. [2022-11-03 02:18:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 1.2504288164665522) internal successors, (1458), 1166 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1458 transitions. [2022-11-03 02:18:35,613 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1458 transitions. Word has length 222 [2022-11-03 02:18:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:35,614 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1458 transitions. [2022-11-03 02:18:35,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1458 transitions. [2022-11-03 02:18:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:35,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:35,616 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:35,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:35,829 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -578323619, now seen corresponding path program 1 times [2022-11-03 02:18:35,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:35,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278297398] [2022-11-03 02:18:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:35,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:35,832 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:35,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:18:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:36,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:18:36,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:45,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:45,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278297398] [2022-11-03 02:18:45,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278297398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:45,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:45,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:45,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62287499] [2022-11-03 02:18:45,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:45,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:45,527 INFO L87 Difference]: Start difference. First operand 1167 states and 1458 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:47,255 INFO L93 Difference]: Finished difference Result 3162 states and 4036 transitions. [2022-11-03 02:18:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:18:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:47,258 INFO L225 Difference]: With dead ends: 3162 [2022-11-03 02:18:47,258 INFO L226 Difference]: Without dead ends: 2513 [2022-11-03 02:18:47,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:18:47,259 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1270 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:47,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 1815 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:18:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2022-11-03 02:18:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1195. [2022-11-03 02:18:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.254606365159129) internal successors, (1498), 1194 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1498 transitions. [2022-11-03 02:18:47,281 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1498 transitions. Word has length 222 [2022-11-03 02:18:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:47,282 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 1498 transitions. [2022-11-03 02:18:47,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1498 transitions. [2022-11-03 02:18:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:47,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:47,283 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:47,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 02:18:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:47,483 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash -437775009, now seen corresponding path program 1 times [2022-11-03 02:18:47,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250243564] [2022-11-03 02:18:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:47,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:47,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:47,486 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:47,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 02:18:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:18:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:49,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:49,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:49,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250243564] [2022-11-03 02:18:49,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250243564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:49,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:49,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:49,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195258050] [2022-11-03 02:18:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:49,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:49,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:49,607 INFO L87 Difference]: Start difference. First operand 1195 states and 1498 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:50,884 INFO L93 Difference]: Finished difference Result 3194 states and 4080 transitions. [2022-11-03 02:18:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:18:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:18:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:50,886 INFO L225 Difference]: With dead ends: 3194 [2022-11-03 02:18:50,886 INFO L226 Difference]: Without dead ends: 2517 [2022-11-03 02:18:50,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:18:50,887 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 1261 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:50,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 1821 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:18:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2022-11-03 02:18:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1199. [2022-11-03 02:18:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 1.2545909849749584) internal successors, (1503), 1198 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1503 transitions. [2022-11-03 02:18:50,906 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1503 transitions. Word has length 222 [2022-11-03 02:18:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:50,907 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1503 transitions. [2022-11-03 02:18:50,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1503 transitions. [2022-11-03 02:18:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:18:50,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:50,908 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:50,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-03 02:18:51,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:51,129 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash -15073183, now seen corresponding path program 1 times [2022-11-03 02:18:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:51,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022045803] [2022-11-03 02:18:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:51,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:51,132 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:51,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 02:18:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 153 conjunts are in the unsatisfiable core [2022-11-03 02:18:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:02,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:23,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022045803] [2022-11-03 02:21:23,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022045803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1115898772] [2022-11-03 02:21:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:23,186 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:23,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:23,187 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:23,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 02:21:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 153 conjunts are in the unsatisfiable core [2022-11-03 02:21:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:33,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1115898772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:39,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620134941] [2022-11-03 02:21:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:39,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:39,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:39,282 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:39,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-03 02:21:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 156 conjunts are in the unsatisfiable core [2022-11-03 02:21:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:49,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620134941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:59,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:59,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43, 44, 44] total 86 [2022-11-03 02:21:59,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043265323] [2022-11-03 02:21:59,492 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:59,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-03 02:21:59,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-03 02:21:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=7029, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:21:59,495 INFO L87 Difference]: Start difference. First operand 1199 states and 1503 transitions. Second operand has 86 states, 86 states have (on average 5.186046511627907) internal successors, (446), 86 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:07,889 INFO L93 Difference]: Finished difference Result 13317 states and 18500 transitions. [2022-11-03 02:25:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-11-03 02:25:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 5.186046511627907) internal successors, (446), 86 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:25:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:07,906 INFO L225 Difference]: With dead ends: 13317 [2022-11-03 02:25:07,906 INFO L226 Difference]: Without dead ends: 13315 [2022-11-03 02:25:07,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1559 GetRequests, 1269 SyntacticMatches, 2 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22619 ImplicationChecksByTransitivity, 265.8s TimeCoverageRelationStatistics Valid=11199, Invalid=72611, Unknown=0, NotChecked=0, Total=83810 [2022-11-03 02:25:07,917 INFO L413 NwaCegarLoop]: 3191 mSDtfsCounter, 17382 mSDsluCounter, 164627 mSDsCounter, 0 mSdLazyCounter, 28113 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17382 SdHoareTripleChecker+Valid, 167818 SdHoareTripleChecker+Invalid, 63912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.7s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 28113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35461 IncrementalHoareTripleChecker+Unchecked, 61.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:07,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17382 Valid, 167818 Invalid, 63912 Unknown, 0 Unchecked, 0.7s Time], IncrementalHoareTripleChecker [338 Valid, 28113 Invalid, 0 Unknown, 35461 Unchecked, 61.2s Time] [2022-11-03 02:25:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13315 states. [2022-11-03 02:25:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13315 to 2403. [2022-11-03 02:25:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2402 states have (on average 1.2568692756036637) internal successors, (3019), 2402 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3019 transitions. [2022-11-03 02:25:08,070 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3019 transitions. Word has length 222 [2022-11-03 02:25:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:08,070 INFO L495 AbstractCegarLoop]: Abstraction has 2403 states and 3019 transitions. [2022-11-03 02:25:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 5.186046511627907) internal successors, (446), 86 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3019 transitions. [2022-11-03 02:25:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:25:08,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:08,073 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:08,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-11-03 02:25:08,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 02:25:08,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-11-03 02:25:08,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:08,688 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -235170467, now seen corresponding path program 1 times [2022-11-03 02:25:08,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:25:08,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538942890] [2022-11-03 02:25:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:08,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:25:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:25:08,691 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:25:08,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 02:25:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:25:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:13,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:13,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:25:13,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538942890] [2022-11-03 02:25:13,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538942890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:13,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:13,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:25:13,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100201628] [2022-11-03 02:25:13,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:13,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:25:13,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:25:13,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:25:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:25:13,090 INFO L87 Difference]: Start difference. First operand 2403 states and 3019 transitions. Second operand has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:14,078 INFO L93 Difference]: Finished difference Result 5179 states and 6620 transitions. [2022-11-03 02:25:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:25:14,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:25:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:14,088 INFO L225 Difference]: With dead ends: 5179 [2022-11-03 02:25:14,088 INFO L226 Difference]: Without dead ends: 3772 [2022-11-03 02:25:14,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:25:14,090 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 412 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 498 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:14,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 3397 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 498 Unchecked, 0.8s Time] [2022-11-03 02:25:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2022-11-03 02:25:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2411. [2022-11-03 02:25:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 1.2576763485477178) internal successors, (3031), 2410 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3031 transitions. [2022-11-03 02:25:14,162 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3031 transitions. Word has length 222 [2022-11-03 02:25:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:14,162 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3031 transitions. [2022-11-03 02:25:14,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.75) internal successors, (222), 8 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3031 transitions. [2022-11-03 02:25:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:25:14,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:14,165 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:14,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:14,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:25:14,379 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash 187531359, now seen corresponding path program 1 times [2022-11-03 02:25:14,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:25:14,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980756910] [2022-11-03 02:25:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:25:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:25:14,382 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:25:14,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 02:25:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:25:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:15,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:25:15,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:25:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980756910] [2022-11-03 02:25:15,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980756910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:15,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:15,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:25:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581801269] [2022-11-03 02:25:15,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:15,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:25:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:25:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:25:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:25:15,202 INFO L87 Difference]: Start difference. First operand 2411 states and 3031 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:15,382 INFO L93 Difference]: Finished difference Result 6460 states and 8254 transitions. [2022-11-03 02:25:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:25:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-11-03 02:25:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:15,388 INFO L225 Difference]: With dead ends: 6460 [2022-11-03 02:25:15,388 INFO L226 Difference]: Without dead ends: 5053 [2022-11-03 02:25:15,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:25:15,391 INFO L413 NwaCegarLoop]: 1164 mSDtfsCounter, 861 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 2817 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:15,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 2817 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2022-11-03 02:25:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 2423. [2022-11-03 02:25:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 1.2572254335260116) internal successors, (3045), 2422 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3045 transitions. [2022-11-03 02:25:15,442 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3045 transitions. Word has length 222 [2022-11-03 02:25:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:15,442 INFO L495 AbstractCegarLoop]: Abstraction has 2423 states and 3045 transitions. [2022-11-03 02:25:15,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3045 transitions. [2022-11-03 02:25:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 02:25:15,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:15,444 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:15,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:15,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:25:15,644 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1501412383, now seen corresponding path program 1 times [2022-11-03 02:25:15,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:25:15,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320257110] [2022-11-03 02:25:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:25:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:25:15,647 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:25:15,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:25:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-03 02:25:16,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:31,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:45,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:27:45,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320257110] [2022-11-03 02:27:45,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320257110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:45,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972466882] [2022-11-03 02:27:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:45,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:27:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:27:45,411 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:27:45,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 02:27:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-03 02:27:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:58,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972466882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055719712] [2022-11-03 02:28:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:03,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:03,928 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:03,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b03e877d-e2ac-4b5c-9491-1556410076a5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 02:28:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 158 conjunts are in the unsatisfiable core [2022-11-03 02:28:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:26,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055719712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:26,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:28:26,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43, 44, 44] total 86 [2022-11-03 02:28:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426076867] [2022-11-03 02:28:26,563 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-03 02:28:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-03 02:28:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=6979, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:28:26,566 INFO L87 Difference]: Start difference. First operand 2423 states and 3045 transitions. Second operand has 86 states, 86 states have (on average 5.186046511627907) internal successors, (446), 86 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)