./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a --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 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- 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-b5237d8 [2022-11-21 17:01:31,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:01:31,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:01:31,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:01:31,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:01:31,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:01:31,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:01:31,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:01:31,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:01:31,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:01:31,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:01:31,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:01:31,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:01:31,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:01:31,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:01:31,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:01:31,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:01:31,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:01:31,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:01:32,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:01:32,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:01:32,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:01:32,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:01:32,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:01:32,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:01:32,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:01:32,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:01:32,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:01:32,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:01:32,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:01:32,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:01:32,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:01:32,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:01:32,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:01:32,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:01:32,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:01:32,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:01:32,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:01:32,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:01:32,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:01:32,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:01:32,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-21 17:01:32,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:01:32,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:01:32,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:01:32,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:01:32,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:01:32,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:01:32,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:01:32,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:01:32,052 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:01:32,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:01:32,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:01:32,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:01:32,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:01:32,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:01:32,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:01:32,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:01:32,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:01:32,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:01:32,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:01:32,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:01:32,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:01:32,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:01:32,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:01:32,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:01:32,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:01:32,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:01:32,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:01:32,058 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:01:32,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:01:32,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:01:32,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2022-11-21 17:01:32,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:01:32,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:01:32,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:01:32,444 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:01:32,444 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:01:32,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-11-21 17:01:35,800 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:01:36,431 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:01:36,431 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-11-21 17:01:36,481 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/data/c8b9c3951/149873facdcb430682abfbc102185a76/FLAG5072bbbd6 [2022-11-21 17:01:36,498 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/data/c8b9c3951/149873facdcb430682abfbc102185a76 [2022-11-21 17:01:36,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:01:36,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:01:36,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:01:36,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:01:36,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:01:36,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:01:36" (1/1) ... [2022-11-21 17:01:36,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a46f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:36, skipping insertion in model container [2022-11-21 17:01:36,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:01:36" (1/1) ... [2022-11-21 17:01:36,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:01:36,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:01:37,324 WARN L1259 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-11-21 17:01:37,325 WARN L1259 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-11-21 17:01:37,740 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_7c72d03c-a94e-4415-8646-1bedcde4d252/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-11-21 17:01:38,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:01:38,987 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:01:39,254 WARN L1259 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-11-21 17:01:39,255 WARN L1259 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-11-21 17:01:39,295 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_7c72d03c-a94e-4415-8646-1bedcde4d252/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-11-21 17:01:39,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:01:39,741 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:01:39,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39 WrapperNode [2022-11-21 17:01:39,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:01:39,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:01:39,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:01:39,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:01:39,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:39,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:39,956 INFO L138 Inliner]: procedures = 202, calls = 1975, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2104 [2022-11-21 17:01:39,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:01:39,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:01:39,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:01:39,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:01:39,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:39,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:39,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:39,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:40,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:40,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:40,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:40,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:40,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:01:40,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:01:40,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:01:40,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:01:40,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (1/1) ... [2022-11-21 17:01:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:01:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:01:40,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:01:40,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:01:40,299 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-11-21 17:01:40,299 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-11-21 17:01:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-21 17:01:40,300 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-21 17:01:40,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-21 17:01:40,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-21 17:01:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-21 17:01:40,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-21 17:01:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-21 17:01:40,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-21 17:01:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-21 17:01:40,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-21 17:01:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-21 17:01:40,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-21 17:01:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 17:01:40,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 17:01:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2022-11-21 17:01:40,305 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2022-11-21 17:01:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-21 17:01:40,305 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-21 17:01:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:01:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 17:01:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-21 17:01:40,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-21 17:01:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-21 17:01:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-21 17:01:40,307 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2022-11-21 17:01:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2022-11-21 17:01:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:01:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 17:01:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-21 17:01:40,309 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-21 17:01:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-21 17:01:40,310 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-21 17:01:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-21 17:01:40,310 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-21 17:01:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-21 17:01:40,311 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-21 17:01:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-21 17:01:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-21 17:01:40,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-21 17:01:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2022-11-21 17:01:40,312 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2022-11-21 17:01:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2022-11-21 17:01:40,312 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2022-11-21 17:01:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-21 17:01:40,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-21 17:01:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-21 17:01:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2022-11-21 17:01:40,313 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2022-11-21 17:01:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2022-11-21 17:01:40,314 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2022-11-21 17:01:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:01:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-21 17:01:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-21 17:01:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2022-11-21 17:01:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2022-11-21 17:01:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-21 17:01:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-21 17:01:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-21 17:01:40,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-21 17:01:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-21 17:01:40,318 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-21 17:01:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:01:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2022-11-21 17:01:40,319 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2022-11-21 17:01:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:01:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-21 17:01:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-21 17:01:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:01:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2022-11-21 17:01:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2022-11-21 17:01:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 17:01:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2022-11-21 17:01:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2022-11-21 17:01:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2022-11-21 17:01:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2022-11-21 17:01:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-21 17:01:40,323 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-21 17:01:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:01:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:01:40,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:01:40,850 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:01:40,853 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:01:41,277 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-21 17:01:45,855 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:01:45,866 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:01:45,866 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 17:01:45,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:01:45 BoogieIcfgContainer [2022-11-21 17:01:45,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:01:45,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:01:45,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:01:45,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:01:45,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:01:36" (1/3) ... [2022-11-21 17:01:45,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c46b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:01:45, skipping insertion in model container [2022-11-21 17:01:45,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:01:39" (2/3) ... [2022-11-21 17:01:45,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c46b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:01:45, skipping insertion in model container [2022-11-21 17:01:45,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:01:45" (3/3) ... [2022-11-21 17:01:45,888 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-11-21 17:01:45,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:01:45,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:01:46,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:01:46,007 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;@6fc611e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:01:46,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 17:01:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 496 states, 367 states have (on average 1.3514986376021798) internal successors, (496), 376 states have internal predecessors, (496), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-21 17:01:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:01:46,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:01:46,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:01:46,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:01:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:01:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1727117326, now seen corresponding path program 1 times [2022-11-21 17:01:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:01:46,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284573908] [2022-11-21 17:01:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:46,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:01:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:46,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:01:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:01:46,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284573908] [2022-11-21 17:01:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284573908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:01:46,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:01:46,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:01:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693085625] [2022-11-21 17:01:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:01:46,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:01:46,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:01:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:01:46,922 INFO L87 Difference]: Start difference. First operand has 496 states, 367 states have (on average 1.3514986376021798) internal successors, (496), 376 states have internal predecessors, (496), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 17:01:51,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:01:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:01:51,684 INFO L93 Difference]: Finished difference Result 1071 states and 1526 transitions. [2022-11-21 17:01:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:01:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-21 17:01:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:01:51,709 INFO L225 Difference]: With dead ends: 1071 [2022-11-21 17:01:51,709 INFO L226 Difference]: Without dead ends: 557 [2022-11-21 17:01:51,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:01:51,731 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 216 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:01:51,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1080 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 750 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-21 17:01:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-21 17:01:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 506. [2022-11-21 17:01:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 379 states have (on average 1.3403693931398417) internal successors, (508), 383 states have internal predecessors, (508), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-21 17:01:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 693 transitions. [2022-11-21 17:01:51,841 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 693 transitions. Word has length 30 [2022-11-21 17:01:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:01:51,842 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 693 transitions. [2022-11-21 17:01:51,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 17:01:51,843 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 693 transitions. [2022-11-21 17:01:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-21 17:01:51,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:01:51,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:01:51,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:01:51,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:01:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:01:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash -786817672, now seen corresponding path program 1 times [2022-11-21 17:01:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:01:51,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129632426] [2022-11-21 17:01:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:51,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:01:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:52,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:01:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:01:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:01:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:52,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129632426] [2022-11-21 17:01:52,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129632426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:01:52,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:01:52,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:01:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619312223] [2022-11-21 17:01:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:01:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:01:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:01:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:01:52,287 INFO L87 Difference]: Start difference. First operand 506 states and 693 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:01:56,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:01:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:01:56,379 INFO L93 Difference]: Finished difference Result 1055 states and 1474 transitions. [2022-11-21 17:01:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:01:56,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-11-21 17:01:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:01:56,400 INFO L225 Difference]: With dead ends: 1055 [2022-11-21 17:01:56,401 INFO L226 Difference]: Without dead ends: 565 [2022-11-21 17:01:56,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:01:56,407 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 172 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:01:56,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1052 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-21 17:01:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-21 17:01:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 513. [2022-11-21 17:01:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 386 states have (on average 1.3419689119170986) internal successors, (518), 390 states have internal predecessors, (518), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-21 17:01:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 703 transitions. [2022-11-21 17:01:56,502 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 703 transitions. Word has length 49 [2022-11-21 17:01:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:01:56,504 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 703 transitions. [2022-11-21 17:01:56,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:01:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 703 transitions. [2022-11-21 17:01:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 17:01:56,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:01:56,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:01:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:01:56,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:01:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:01:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1139185204, now seen corresponding path program 1 times [2022-11-21 17:01:56,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:01:56,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680095062] [2022-11-21 17:01:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:56,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:01:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:56,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:01:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:01:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:01:56,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:56,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680095062] [2022-11-21 17:01:56,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680095062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:01:56,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:01:56,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:01:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561873981] [2022-11-21 17:01:56,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:01:56,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:01:56,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:01:56,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:01:56,908 INFO L87 Difference]: Start difference. First operand 513 states and 703 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:02:00,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:01,121 INFO L93 Difference]: Finished difference Result 1062 states and 1485 transitions. [2022-11-21 17:02:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:02:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-21 17:02:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:01,125 INFO L225 Difference]: With dead ends: 1062 [2022-11-21 17:02:01,126 INFO L226 Difference]: Without dead ends: 565 [2022-11-21 17:02:01,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:02:01,129 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 164 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 94 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:01,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1050 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 743 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-21 17:02:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-21 17:02:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 515. [2022-11-21 17:02:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 388 states have (on average 1.3402061855670102) internal successors, (520), 392 states have internal predecessors, (520), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-21 17:02:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 705 transitions. [2022-11-21 17:02:01,160 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 705 transitions. Word has length 55 [2022-11-21 17:02:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:01,161 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 705 transitions. [2022-11-21 17:02:01,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:02:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 705 transitions. [2022-11-21 17:02:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 17:02:01,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:01,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:02:01,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash -118116850, now seen corresponding path program 1 times [2022-11-21 17:02:01,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:01,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093305522] [2022-11-21 17:02:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:02:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:01,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:02:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 17:02:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:01,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093305522] [2022-11-21 17:02:01,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093305522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:02:01,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:02:01,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:02:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385508361] [2022-11-21 17:02:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:02:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:02:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:02:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:02:01,463 INFO L87 Difference]: Start difference. First operand 515 states and 705 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:02:05,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:06,176 INFO L93 Difference]: Finished difference Result 1107 states and 1553 transitions. [2022-11-21 17:02:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:02:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-21 17:02:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:06,183 INFO L225 Difference]: With dead ends: 1107 [2022-11-21 17:02:06,183 INFO L226 Difference]: Without dead ends: 608 [2022-11-21 17:02:06,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:02:06,187 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 221 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 97 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:06,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1048 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 747 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-21 17:02:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-21 17:02:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 556. [2022-11-21 17:02:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 427 states have (on average 1.3559718969555035) internal successors, (579), 431 states have internal predecessors, (579), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-21 17:02:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 768 transitions. [2022-11-21 17:02:06,234 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 768 transitions. Word has length 55 [2022-11-21 17:02:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:06,236 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 768 transitions. [2022-11-21 17:02:06,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:02:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 768 transitions. [2022-11-21 17:02:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 17:02:06,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:06,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:06,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:02:06,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash -954147216, now seen corresponding path program 1 times [2022-11-21 17:02:06,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:06,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291999252] [2022-11-21 17:02:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:02:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:02:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:02:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 17:02:06,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:06,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291999252] [2022-11-21 17:02:06,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291999252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:02:06,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:02:06,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:02:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470155229] [2022-11-21 17:02:06,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:02:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:02:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:02:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:02:06,822 INFO L87 Difference]: Start difference. First operand 556 states and 768 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 17:02:12,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:14,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:16,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:18,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:19,080 INFO L93 Difference]: Finished difference Result 1522 states and 2213 transitions. [2022-11-21 17:02:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:02:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-11-21 17:02:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:19,087 INFO L225 Difference]: With dead ends: 1522 [2022-11-21 17:02:19,087 INFO L226 Difference]: Without dead ends: 982 [2022-11-21 17:02:19,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:02:19,091 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 705 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 333 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:19,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 1250 Invalid, 1523 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [333 Valid, 1186 Invalid, 4 Unknown, 0 Unchecked, 12.0s Time] [2022-11-21 17:02:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-21 17:02:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 558. [2022-11-21 17:02:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 429 states have (on average 1.3543123543123543) internal successors, (581), 433 states have internal predecessors, (581), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-21 17:02:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 770 transitions. [2022-11-21 17:02:19,135 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 770 transitions. Word has length 78 [2022-11-21 17:02:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:19,136 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 770 transitions. [2022-11-21 17:02:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 17:02:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 770 transitions. [2022-11-21 17:02:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-21 17:02:19,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:19,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:02:19,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash -842085785, now seen corresponding path program 1 times [2022-11-21 17:02:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:19,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206561031] [2022-11-21 17:02:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:19,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:02:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:02:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 17:02:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-21 17:02:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:02:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:02:19,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:19,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206561031] [2022-11-21 17:02:19,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206561031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:02:19,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:02:19,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:02:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825178486] [2022-11-21 17:02:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:02:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:02:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:02:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:02:19,768 INFO L87 Difference]: Start difference. First operand 558 states and 770 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-21 17:02:26,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:28,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:29,632 INFO L93 Difference]: Finished difference Result 1451 states and 2038 transitions. [2022-11-21 17:02:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:02:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 82 [2022-11-21 17:02:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:29,639 INFO L225 Difference]: With dead ends: 1451 [2022-11-21 17:02:29,639 INFO L226 Difference]: Without dead ends: 909 [2022-11-21 17:02:29,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-21 17:02:29,643 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1399 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 580 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:29,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 1203 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 1416 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2022-11-21 17:02:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-21 17:02:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 695. [2022-11-21 17:02:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 529 states have (on average 1.3421550094517958) internal successors, (710), 534 states have internal predecessors, (710), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-11-21 17:02:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 945 transitions. [2022-11-21 17:02:29,702 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 945 transitions. Word has length 82 [2022-11-21 17:02:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:29,703 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 945 transitions. [2022-11-21 17:02:29,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-21 17:02:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 945 transitions. [2022-11-21 17:02:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-21 17:02:29,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:29,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:02:29,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash -62788405, now seen corresponding path program 1 times [2022-11-21 17:02:29,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615469112] [2022-11-21 17:02:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:30,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:02:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:30,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:02:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:30,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:02:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 17:02:30,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615469112] [2022-11-21 17:02:30,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615469112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:02:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579329529] [2022-11-21 17:02:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:30,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:30,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:02:30,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:02:30,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:02:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 17:02:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:02:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 17:02:31,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:02:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 17:02:31,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579329529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:02:31,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:02:31,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-21 17:02:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674962225] [2022-11-21 17:02:31,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:02:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:02:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:02:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:02:31,114 INFO L87 Difference]: Start difference. First operand 695 states and 945 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 17:02:41,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:43,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:45,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:47,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:48,494 INFO L93 Difference]: Finished difference Result 2643 states and 3902 transitions. [2022-11-21 17:02:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 17:02:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2022-11-21 17:02:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:48,507 INFO L225 Difference]: With dead ends: 2643 [2022-11-21 17:02:48,507 INFO L226 Difference]: Without dead ends: 1964 [2022-11-21 17:02:48,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:02:48,512 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 1686 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 549 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 3179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:48,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 2728 Invalid, 3179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [549 Valid, 2626 Invalid, 4 Unknown, 0 Unchecked, 17.0s Time] [2022-11-21 17:02:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-11-21 17:02:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 725. [2022-11-21 17:02:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 559 states have (on average 1.3452593917710196) internal successors, (752), 564 states have internal predecessors, (752), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-11-21 17:02:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 987 transitions. [2022-11-21 17:02:48,592 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 987 transitions. Word has length 83 [2022-11-21 17:02:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:48,592 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 987 transitions. [2022-11-21 17:02:48,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 17:02:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 987 transitions. [2022-11-21 17:02:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-21 17:02:48,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:48,596 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:48,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:02:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:48,812 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1289006181, now seen corresponding path program 1 times [2022-11-21 17:02:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:48,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281538730] [2022-11-21 17:02:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:48,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:49,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:02:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:02:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:49,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-21 17:02:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:50,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-21 17:02:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-21 17:02:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:02:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 17:02:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281538730] [2022-11-21 17:02:50,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281538730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:02:50,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138634067] [2022-11-21 17:02:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:50,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:02:50,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:02:50,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:02:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 3691 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:02:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:02:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:02:51,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:02:51,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138634067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:02:51,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:02:51,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-21 17:02:51,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405509248] [2022-11-21 17:02:51,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:02:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:02:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:02:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:02:51,220 INFO L87 Difference]: Start difference. First operand 725 states and 987 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 17:02:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:51,441 INFO L93 Difference]: Finished difference Result 1895 states and 2584 transitions. [2022-11-21 17:02:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:02:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2022-11-21 17:02:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:51,448 INFO L225 Difference]: With dead ends: 1895 [2022-11-21 17:02:51,448 INFO L226 Difference]: Without dead ends: 1186 [2022-11-21 17:02:51,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:02:51,451 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 501 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:51,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 4124 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:02:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-21 17:02:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 729. [2022-11-21 17:02:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 562 states have (on average 1.3434163701067616) internal successors, (755), 567 states have internal predecessors, (755), 118 states have call successors, (118), 48 states have call predecessors, (118), 48 states have return successors, (118), 118 states have call predecessors, (118), 117 states have call successors, (118) [2022-11-21 17:02:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 991 transitions. [2022-11-21 17:02:51,521 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 991 transitions. Word has length 97 [2022-11-21 17:02:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:51,521 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 991 transitions. [2022-11-21 17:02:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 17:02:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 991 transitions. [2022-11-21 17:02:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-21 17:02:51,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:51,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:51,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:02:51,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:51,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1349466064, now seen corresponding path program 2 times [2022-11-21 17:02:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141158047] [2022-11-21 17:02:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:52,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:02:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:52,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:02:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:52,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:02:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 17:02:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141158047] [2022-11-21 17:02:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141158047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:02:52,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:02:52,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:02:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400712605] [2022-11-21 17:02:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:02:52,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:02:52,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:52,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:02:52,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:02:52,393 INFO L87 Difference]: Start difference. First operand 729 states and 991 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 17:02:56,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:02:58,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:00,055 INFO L93 Difference]: Finished difference Result 946 states and 1333 transitions. [2022-11-21 17:03:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:03:00,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2022-11-21 17:03:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:00,063 INFO L225 Difference]: With dead ends: 946 [2022-11-21 17:03:00,063 INFO L226 Difference]: Without dead ends: 943 [2022-11-21 17:03:00,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-21 17:03:00,065 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1034 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 312 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:03:00,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 885 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 777 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-11-21 17:03:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-21 17:03:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 733. [2022-11-21 17:03:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 565 states have (on average 1.3415929203539823) internal successors, (758), 570 states have internal predecessors, (758), 118 states have call successors, (118), 49 states have call predecessors, (118), 49 states have return successors, (118), 118 states have call predecessors, (118), 117 states have call successors, (118) [2022-11-21 17:03:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 994 transitions. [2022-11-21 17:03:00,141 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 994 transitions. Word has length 98 [2022-11-21 17:03:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:00,141 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 994 transitions. [2022-11-21 17:03:00,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-21 17:03:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 994 transitions. [2022-11-21 17:03:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-21 17:03:00,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:00,145 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:00,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 17:03:00,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1046918848, now seen corresponding path program 1 times [2022-11-21 17:03:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:00,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766328458] [2022-11-21 17:03:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:00,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:03:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:03:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:03:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-21 17:03:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-21 17:03:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-21 17:03:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-21 17:03:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-21 17:03:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-21 17:03:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-21 17:03:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:01,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-21 17:03:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-21 17:03:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-21 17:03:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-21 17:03:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:01,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-21 17:03:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766328458] [2022-11-21 17:03:01,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766328458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:01,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:01,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 17:03:01,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361996726] [2022-11-21 17:03:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:01,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:03:01,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:03:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:03:01,055 INFO L87 Difference]: Start difference. First operand 733 states and 994 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-21 17:03:05,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:07,203 INFO L93 Difference]: Finished difference Result 1699 states and 2360 transitions. [2022-11-21 17:03:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:03:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 198 [2022-11-21 17:03:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:07,214 INFO L225 Difference]: With dead ends: 1699 [2022-11-21 17:03:07,214 INFO L226 Difference]: Without dead ends: 982 [2022-11-21 17:03:07,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:03:07,218 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1138 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 535 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:03:07,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 1118 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1460 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-21 17:03:07,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-21 17:03:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 734. [2022-11-21 17:03:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 566 states have (on average 1.3409893992932862) internal successors, (759), 571 states have internal predecessors, (759), 118 states have call successors, (118), 49 states have call predecessors, (118), 49 states have return successors, (118), 118 states have call predecessors, (118), 117 states have call successors, (118) [2022-11-21 17:03:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 995 transitions. [2022-11-21 17:03:07,287 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 995 transitions. Word has length 198 [2022-11-21 17:03:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:07,288 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 995 transitions. [2022-11-21 17:03:07,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-21 17:03:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 995 transitions. [2022-11-21 17:03:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-21 17:03:07,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:07,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:03:07,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:07,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2142624360, now seen corresponding path program 1 times [2022-11-21 17:03:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:07,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117568579] [2022-11-21 17:03:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:07,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:03:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:03:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:03:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-21 17:03:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-21 17:03:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-21 17:03:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-21 17:03:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-21 17:03:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-21 17:03:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-21 17:03:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-11-21 17:03:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-21 17:03:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-21 17:03:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 17:03:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-11-21 17:03:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-21 17:03:08,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:08,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117568579] [2022-11-21 17:03:08,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117568579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:03:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625572711] [2022-11-21 17:03:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:08,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:08,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:03:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 4810 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 17:03:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 17:03:10,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 17:03:10,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625572711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:03:10,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:03:10,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-21 17:03:10,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597936885] [2022-11-21 17:03:10,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:03:10,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:03:10,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:03:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:03:10,365 INFO L87 Difference]: Start difference. First operand 734 states and 995 transitions. Second operand has 18 states, 18 states have (on average 13.61111111111111) internal successors, (245), 14 states have internal predecessors, (245), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-21 17:03:22,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:24,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:29,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:31,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:33,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:35,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:37,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:39,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:03:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:43,200 INFO L93 Difference]: Finished difference Result 4768 states and 7180 transitions. [2022-11-21 17:03:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-21 17:03:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.61111111111111) internal successors, (245), 14 states have internal predecessors, (245), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 208 [2022-11-21 17:03:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:43,222 INFO L225 Difference]: With dead ends: 4768 [2022-11-21 17:03:43,223 INFO L226 Difference]: Without dead ends: 4050 [2022-11-21 17:03:43,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2022-11-21 17:03:43,228 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 7608 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 6443 mSolverCounterSat, 2927 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7979 SdHoareTripleChecker+Valid, 3678 SdHoareTripleChecker+Invalid, 9378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2927 IncrementalHoareTripleChecker+Valid, 6443 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:03:43,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7979 Valid, 3678 Invalid, 9378 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2927 Valid, 6443 Invalid, 8 Unknown, 0 Unchecked, 31.2s Time] [2022-11-21 17:03:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-11-21 17:03:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 801. [2022-11-21 17:03:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 632 states have (on average 1.3433544303797469) internal successors, (849), 637 states have internal predecessors, (849), 119 states have call successors, (119), 49 states have call predecessors, (119), 49 states have return successors, (119), 119 states have call predecessors, (119), 118 states have call successors, (119) [2022-11-21 17:03:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1087 transitions. [2022-11-21 17:03:43,387 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1087 transitions. Word has length 208 [2022-11-21 17:03:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:43,388 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1087 transitions. [2022-11-21 17:03:43,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.61111111111111) internal successors, (245), 14 states have internal predecessors, (245), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-21 17:03:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1087 transitions. [2022-11-21 17:03:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-21 17:03:43,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:43,394 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:43,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:03:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 17:03:43,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -342986480, now seen corresponding path program 2 times [2022-11-21 17:03:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:43,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261645678] [2022-11-21 17:03:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:43,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:03:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:03:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:03:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-21 17:03:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-21 17:03:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-21 17:03:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-21 17:03:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-21 17:03:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-21 17:03:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-11-21 17:03:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-21 17:03:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-11-21 17:03:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-21 17:03:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-11-21 17:03:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-11-21 17:03:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-11-21 17:03:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:45,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:03:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 17:03:46,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261645678] [2022-11-21 17:03:46,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261645678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:03:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079306967] [2022-11-21 17:03:46,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:03:46,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:46,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:46,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:03:47,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:03:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:03:47,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 5037 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 17:03:47,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-21 17:03:47,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 17:03:48,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079306967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:03:48,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:03:48,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 23 [2022-11-21 17:03:48,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127068709] [2022-11-21 17:03:48,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:03:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 17:03:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 17:03:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:03:48,356 INFO L87 Difference]: Start difference. First operand 801 states and 1087 transitions. Second operand has 23 states, 23 states have (on average 10.869565217391305) internal successors, (250), 19 states have internal predecessors, (250), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-21 17:04:03,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:04:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:10,158 INFO L93 Difference]: Finished difference Result 6737 states and 10219 transitions. [2022-11-21 17:04:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-21 17:04:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.869565217391305) internal successors, (250), 19 states have internal predecessors, (250), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 248 [2022-11-21 17:04:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:10,189 INFO L225 Difference]: With dead ends: 6737 [2022-11-21 17:04:10,189 INFO L226 Difference]: Without dead ends: 5952 [2022-11-21 17:04:10,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 554 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2442, Unknown=0, NotChecked=0, Total=3422 [2022-11-21 17:04:10,196 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 11896 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 7577 mSolverCounterSat, 4832 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12466 SdHoareTripleChecker+Valid, 4810 SdHoareTripleChecker+Invalid, 12410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4832 IncrementalHoareTripleChecker+Valid, 7577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:10,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12466 Valid, 4810 Invalid, 12410 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4832 Valid, 7577 Invalid, 1 Unknown, 0 Unchecked, 19.2s Time] [2022-11-21 17:04:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5952 states. [2022-11-21 17:04:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5952 to 861. [2022-11-21 17:04:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 692 states have (on average 1.3482658959537572) internal successors, (933), 697 states have internal predecessors, (933), 119 states have call successors, (119), 49 states have call predecessors, (119), 49 states have return successors, (119), 119 states have call predecessors, (119), 118 states have call successors, (119) [2022-11-21 17:04:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1171 transitions. [2022-11-21 17:04:10,524 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1171 transitions. Word has length 248 [2022-11-21 17:04:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:10,524 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1171 transitions. [2022-11-21 17:04:10,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.869565217391305) internal successors, (250), 19 states have internal predecessors, (250), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-21 17:04:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1171 transitions. [2022-11-21 17:04:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-21 17:04:10,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:10,532 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:10,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 17:04:10,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c72d03c-a94e-4415-8646-1bedcde4d252/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:10,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1796842416, now seen corresponding path program 3 times [2022-11-21 17:04:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:04:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463130242] [2022-11-21 17:04:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:04:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 17:04:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 17:04:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 17:04:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-21 17:04:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:04:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-11-21 17:04:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-21 17:04:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-21 17:04:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-11-21 17:04:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:04:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-21 17:04:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-11-21 17:04:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-11-21 17:04:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-11-21 17:04:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-11-21 17:04:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-11-21 17:04:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-11-21 17:04:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-11-21 17:04:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 17:04:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:04:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-11-21 17:04:13,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:04:13,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463130242] [2022-11-21 17:04:13,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463130242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:04:13,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:04:13,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 17:04:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881225049] [2022-11-21 17:04:13,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:04:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:04:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:04:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:04:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 17:04:13,592 INFO L87 Difference]: Start difference. First operand 861 states and 1171 transitions. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-21 17:04:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:14,530 INFO L93 Difference]: Finished difference Result 1437 states and 1995 transitions. [2022-11-21 17:04:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:04:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 278 [2022-11-21 17:04:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:14,538 INFO L225 Difference]: With dead ends: 1437 [2022-11-21 17:04:14,538 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 17:04:14,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:04:14,544 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 289 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:14,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 684 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 17:04:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 17:04:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 17:04:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:04:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 17:04:14,546 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 278 [2022-11-21 17:04:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:14,547 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 17:04:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-21 17:04:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 17:04:14,547 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 17:04:14,550 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 17:04:14,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 17:04:14,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-21 17:05:05,823 WARN L233 SmtUtils]: Spent 51.05s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-21 17:05:55,829 WARN L233 SmtUtils]: Spent 49.96s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-21 17:06:02,432 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 373 DAG size of output: 369 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-21 17:06:50,318 WARN L233 SmtUtils]: Spent 46.37s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-21 17:07:36,934 WARN L233 SmtUtils]: Spent 46.61s on a formula simplification. DAG size of input: 124 DAG size of output: 122 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)