./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9dc175bed280c85fbc7018a36f57353cd7d8c459346c67f95db055f6ec935a28 --- 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-2329fc7 [2022-12-13 13:05:37,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:05:37,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:05:37,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:05:37,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:05:37,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:05:37,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:05:37,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:05:37,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:05:37,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:05:37,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:05:37,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:05:37,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:05:37,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:05:37,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:05:37,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:05:37,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:05:37,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:05:37,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:05:37,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:05:37,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:05:37,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:05:37,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:05:37,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:05:37,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:05:37,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:05:37,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:05:37,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:05:37,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:05:37,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:05:37,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:05:37,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:05:37,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:05:37,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:05:37,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:05:37,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:05:37,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:05:37,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:05:37,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:05:37,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:05:37,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:05:37,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:05:37,987 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:05:37,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:05:37,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:05:37,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:05:37,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:05:37,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:05:37,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:05:37,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:05:37,990 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:05:37,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:05:37,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:05:37,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:05:37,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:05:37,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:05:37,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:05:37,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:05:37,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:05:37,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:05:37,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:05:37,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:05:37,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:05:37,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:05:37,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:05:37,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:05:37,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:05:37,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:05:37,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:05:37,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:05:37,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:05:37,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:05:37,994 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:05:37,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:05:37,994 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:05:37,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:05:37,994 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:05:37,994 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dc175bed280c85fbc7018a36f57353cd7d8c459346c67f95db055f6ec935a28 [2022-12-13 13:05:38,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:05:38,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:05:38,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:05:38,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:05:38,185 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:05:38,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2022-12-13 13:05:40,773 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:05:40,898 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:05:40,898 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2022-12-13 13:05:40,902 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/data/f0e6f04b8/6144498b07e046ee8de8cd5d1da4ca4c/FLAGaf85877cb [2022-12-13 13:05:40,913 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/data/f0e6f04b8/6144498b07e046ee8de8cd5d1da4ca4c [2022-12-13 13:05:40,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:05:40,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:05:40,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:05:40,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:05:40,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:05:40,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:05:40" (1/1) ... [2022-12-13 13:05:40,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52097947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:40, skipping insertion in model container [2022-12-13 13:05:40,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:05:40" (1/1) ... [2022-12-13 13:05:40,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:05:40,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:05:41,036 WARN L237 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_34a59d52-b6f0-4269-a580-aa4591d5f3a4/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c[454,467] [2022-12-13 13:05:41,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:05:41,047 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:05:41,056 WARN L237 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_34a59d52-b6f0-4269-a580-aa4591d5f3a4/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c[454,467] [2022-12-13 13:05:41,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:05:41,067 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:05:41,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41 WrapperNode [2022-12-13 13:05:41,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:05:41,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:05:41,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:05:41,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:05:41,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,089 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-12-13 13:05:41,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:05:41,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:05:41,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:05:41,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:05:41,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,100 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:05:41,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:05:41,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:05:41,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:05:41,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (1/1) ... [2022-12-13 13:05:41,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:05:41,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:41,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:05:41,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:05:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:05:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:05:41,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:05:41,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:05:41,157 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-12-13 13:05:41,157 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-12-13 13:05:41,206 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:05:41,208 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:05:41,277 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:05:41,283 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:05:41,283 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 13:05:41,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:05:41 BoogieIcfgContainer [2022-12-13 13:05:41,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:05:41,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:05:41,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:05:41,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:05:41,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:05:40" (1/3) ... [2022-12-13 13:05:41,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a2b224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:05:41, skipping insertion in model container [2022-12-13 13:05:41,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:41" (2/3) ... [2022-12-13 13:05:41,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a2b224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:05:41, skipping insertion in model container [2022-12-13 13:05:41,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:05:41" (3/3) ... [2022-12-13 13:05:41,295 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2022-12-13 13:05:41,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:05:41,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:05:41,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:05:41,370 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=PETRI_NET, 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;@68a27ff1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:05:41,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:05:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 13:05:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 13:05:41,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:41,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:41,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-12-13 13:05:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956727582] [2022-12-13 13:05:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:41,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:41,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:41,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956727582] [2022-12-13 13:05:41,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956727582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:05:41,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:05:41,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:05:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734932163] [2022-12-13 13:05:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:05:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:05:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:05:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:05:41,602 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:05:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:05:41,637 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-12-13 13:05:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:05:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-12-13 13:05:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:05:41,645 INFO L225 Difference]: With dead ends: 28 [2022-12-13 13:05:41,646 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 13:05:41,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:05:41,650 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:05:41,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:05:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 13:05:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 13:05:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:05:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-13 13:05:41,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-12-13 13:05:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:05:41,681 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-13 13:05:41,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:05:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-13 13:05:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 13:05:41,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:41,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:05:41,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-12-13 13:05:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111430466] [2022-12-13 13:05:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:41,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:41,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:05:41,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111430466] [2022-12-13 13:05:41,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111430466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481893692] [2022-12-13 13:05:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:41,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:41,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:41,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:41,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:05:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:05:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:05:41,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:05:42,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481893692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:42,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:42,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-12-13 13:05:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177506048] [2022-12-13 13:05:42,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:42,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:05:42,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:05:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:05:42,129 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 13:05:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:05:42,174 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-13 13:05:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:05:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-12-13 13:05:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:05:42,175 INFO L225 Difference]: With dead ends: 22 [2022-12-13 13:05:42,176 INFO L226 Difference]: Without dead ends: 18 [2022-12-13 13:05:42,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:05:42,178 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:05:42,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:05:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-13 13:05:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-13 13:05:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:05:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-13 13:05:42,184 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-12-13 13:05:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:05:42,184 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-13 13:05:42,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 13:05:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-13 13:05:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:05:42,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:42,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:42,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:05:42,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:42,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:42,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-12-13 13:05:42,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:42,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948922621] [2022-12-13 13:05:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:42,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:42,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:05:42,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:42,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948922621] [2022-12-13 13:05:42,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948922621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:42,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912899619] [2022-12-13 13:05:42,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:05:42,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:42,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:42,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:42,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:05:42,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:05:42,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:42,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:05:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 13:05:42,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:42,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912899619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:42,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:42,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2022-12-13 13:05:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737163264] [2022-12-13 13:05:42,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:05:42,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:05:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:05:42,844 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 13:05:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:05:42,887 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-12-13 13:05:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:05:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-12-13 13:05:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:05:42,889 INFO L225 Difference]: With dead ends: 25 [2022-12-13 13:05:42,889 INFO L226 Difference]: Without dead ends: 21 [2022-12-13 13:05:42,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:05:42,890 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:05:42,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:05:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-13 13:05:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-13 13:05:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:05:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-12-13 13:05:42,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-12-13 13:05:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:05:42,896 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-12-13 13:05:42,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 13:05:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-12-13 13:05:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 13:05:42,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:42,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:42,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:05:43,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:43,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:43,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-12-13 13:05:43,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:43,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105146706] [2022-12-13 13:05:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:43,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:43,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:05:43,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105146706] [2022-12-13 13:05:43,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105146706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175535404] [2022-12-13 13:05:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:05:43,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:43,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:43,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:05:43,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 13:05:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 13:05:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:05:43,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:05:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175535404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:43,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-12-13 13:05:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283011748] [2022-12-13 13:05:43,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:43,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 13:05:43,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 13:05:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-12-13 13:05:43,816 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-13 13:05:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:05:43,985 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-12-13 13:05:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:05:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28 [2022-12-13 13:05:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:05:43,986 INFO L225 Difference]: With dead ends: 39 [2022-12-13 13:05:43,986 INFO L226 Difference]: Without dead ends: 33 [2022-12-13 13:05:43,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 13:05:43,988 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:05:43,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 69 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:05:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-13 13:05:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-13 13:05:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:05:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-12-13 13:05:43,994 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-12-13 13:05:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:05:43,995 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-12-13 13:05:43,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-13 13:05:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-12-13 13:05:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 13:05:43,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:43,996 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:44,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:05:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:44,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2022-12-13 13:05:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:44,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894082841] [2022-12-13 13:05:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-13 13:05:44,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894082841] [2022-12-13 13:05:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894082841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:44,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626989199] [2022-12-13 13:05:44,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:05:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:44,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:44,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:05:44,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:05:44,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:44,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:05:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 13:05:44,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 13:05:46,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626989199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:46,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:46,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2022-12-13 13:05:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240699517] [2022-12-13 13:05:46,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:46,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 13:05:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 13:05:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-12-13 13:05:46,267 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-13 13:05:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:05:46,347 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-12-13 13:05:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:05:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-12-13 13:05:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:05:46,349 INFO L225 Difference]: With dead ends: 40 [2022-12-13 13:05:46,349 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 13:05:46,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2022-12-13 13:05:46,350 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:05:46,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 91 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:05:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 13:05:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-13 13:05:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 13:05:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-13 13:05:46,357 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-12-13 13:05:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:05:46,357 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-13 13:05:46,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-13 13:05:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-13 13:05:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 13:05:46,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:46,359 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:46,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:05:46,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:46,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2022-12-13 13:05:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:46,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556869293] [2022-12-13 13:05:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:46,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:47,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 13:05:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-13 13:05:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556869293] [2022-12-13 13:05:47,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556869293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573152812] [2022-12-13 13:05:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:05:47,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:47,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:47,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:05:47,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-12-13 13:05:47,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:47,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 13:05:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 13:05:47,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 13:05:48,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573152812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:48,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:48,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 21] total 37 [2022-12-13 13:05:48,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885518872] [2022-12-13 13:05:48,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 13:05:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 13:05:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 13:05:48,905 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 37 states, 36 states have (on average 1.5) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2022-12-13 13:05:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:05:49,194 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-12-13 13:05:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 13:05:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 58 [2022-12-13 13:05:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:05:49,195 INFO L225 Difference]: With dead ends: 48 [2022-12-13 13:05:49,195 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 13:05:49,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 94 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 13:05:49,197 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:05:49,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:05:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 13:05:49,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-13 13:05:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-13 13:05:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-12-13 13:05:49,200 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 58 [2022-12-13 13:05:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:05:49,201 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-12-13 13:05:49,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 19 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2022-12-13 13:05:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-12-13 13:05:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 13:05:49,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:05:49,201 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:49,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:05:49,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:49,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:05:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 6 times [2022-12-13 13:05:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:49,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984709626] [2022-12-13 13:05:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:49,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:05:49,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:05:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:05:49,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:05:49,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:05:49,440 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 13:05:49,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:05:49,444 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1] [2022-12-13 13:05:49,447 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 13:05:49,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 01:05:49 BoogieIcfgContainer [2022-12-13 13:05:49,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 13:05:49,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 13:05:49,465 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 13:05:49,465 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 13:05:49,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:05:41" (3/4) ... [2022-12-13 13:05:49,467 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 13:05:49,493 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 13:05:49,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 13:05:49,494 INFO L158 Benchmark]: Toolchain (without parser) took 8578.19ms. Allocated memory was 138.4MB in the beginning and 172.0MB in the end (delta: 33.6MB). Free memory was 98.4MB in the beginning and 70.9MB in the end (delta: 27.5MB). Peak memory consumption was 62.5MB. Max. memory is 16.1GB. [2022-12-13 13:05:49,494 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 138.4MB. Free memory was 80.9MB in the beginning and 80.7MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:05:49,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 150.77ms. Allocated memory is still 138.4MB. Free memory was 98.4MB in the beginning and 88.9MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:05:49,494 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.67ms. Allocated memory is still 138.4MB. Free memory was 88.5MB in the beginning and 87.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:05:49,495 INFO L158 Benchmark]: Boogie Preprocessor took 11.89ms. Allocated memory is still 138.4MB. Free memory was 87.3MB in the beginning and 86.4MB in the end (delta: 942.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:05:49,495 INFO L158 Benchmark]: RCFGBuilder took 183.03ms. Allocated memory is still 138.4MB. Free memory was 86.4MB in the beginning and 77.4MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 13:05:49,495 INFO L158 Benchmark]: TraceAbstraction took 8176.80ms. Allocated memory was 138.4MB in the beginning and 172.0MB in the end (delta: 33.6MB). Free memory was 76.8MB in the beginning and 73.0MB in the end (delta: 3.8MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2022-12-13 13:05:49,496 INFO L158 Benchmark]: Witness Printer took 28.47ms. Allocated memory is still 172.0MB. Free memory was 73.0MB in the beginning and 70.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 13:05:49,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 138.4MB. Free memory was 80.9MB in the beginning and 80.7MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 150.77ms. Allocated memory is still 138.4MB. Free memory was 98.4MB in the beginning and 88.9MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.67ms. Allocated memory is still 138.4MB. Free memory was 88.5MB in the beginning and 87.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.89ms. Allocated memory is still 138.4MB. Free memory was 87.3MB in the beginning and 86.4MB in the end (delta: 942.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 183.03ms. Allocated memory is still 138.4MB. Free memory was 86.4MB in the beginning and 77.4MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8176.80ms. Allocated memory was 138.4MB in the beginning and 172.0MB in the end (delta: 33.6MB). Free memory was 76.8MB in the beginning and 73.0MB in the end (delta: 3.8MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. * Witness Printer took 28.47ms. Allocated memory is still 172.0MB. Free memory was 73.0MB in the beginning and 70.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 10; VAL [input=10] [L13] CALL, EXPR id(input) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=10, input=10] [L13] int result = id(input); [L14] COND TRUE result == 10 VAL [input=10, result=10] [L15] reach_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 7, TraceHistogramMax: 11, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 150 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 106 mSDsluCounter, 391 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 330 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 374 IncrementalHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 61 mSDtfsCounter, 374 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 491 GetRequests, 307 SyntacticMatches, 28 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=6, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 432 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 1309 SizeOfPredicates, 13 NumberOfNonLiveVariables, 474 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 528/1206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 13:05:49,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a59d52-b6f0-4269-a580-aa4591d5f3a4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE