./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --- 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-38b53e6 [2022-11-25 15:44:35,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:44:35,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:44:35,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:44:35,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:44:35,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:44:35,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:44:35,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:44:35,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:44:35,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:44:35,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:44:35,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:44:35,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:44:35,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:44:35,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:44:35,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:44:35,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:44:35,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:44:35,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:44:35,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:44:35,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:44:35,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:44:35,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:44:35,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:44:35,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:44:35,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:44:35,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:44:35,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:44:35,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:44:35,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:44:35,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:44:35,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:44:35,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:44:35,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:44:35,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:44:35,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:44:35,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:44:35,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:44:35,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:44:35,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:44:35,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:44:35,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:44:36,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:44:36,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:44:36,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:44:36,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:44:36,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:44:36,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:44:36,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:44:36,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:44:36,022 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:44:36,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:44:36,023 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:44:36,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:44:36,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:44:36,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:44:36,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:44:36,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:44:36,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:44:36,024 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:44:36,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:44:36,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:44:36,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:44:36,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:44:36,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:44:36,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:44:36,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:44:36,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:44:36,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:44:36,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:44:36,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:44:36,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:44:36,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:44:36,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:44:36,027 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:44:36,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:44:36,028 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 [2022-11-25 15:44:36,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:44:36,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:44:36,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:44:36,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:44:36,395 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:44:36,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/eca-rers2018/Problem13.c [2022-11-25 15:44:40,205 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:44:42,434 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:44:42,435 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/sv-benchmarks/c/eca-rers2018/Problem13.c [2022-11-25 15:44:42,664 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/data/71b33e726/5897f98c71d44685a4d822f122ff9d5c/FLAG1dcafd509 [2022-11-25 15:44:42,689 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/data/71b33e726/5897f98c71d44685a4d822f122ff9d5c [2022-11-25 15:44:42,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:44:42,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:44:42,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:44:42,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:44:42,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:44:42,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:44:42" (1/1) ... [2022-11-25 15:44:42,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52004bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:42, skipping insertion in model container [2022-11-25 15:44:42,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:44:42" (1/1) ... [2022-11-25 15:44:42,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:44:43,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:44:44,276 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_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2022-11-25 15:44:44,315 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_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2022-11-25 15:45:03,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:45:03,127 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:45:03,143 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_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2022-11-25 15:45:03,144 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_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2022-11-25 15:45:05,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:45:07,045 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:45:07,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07 WrapperNode [2022-11-25 15:45:07,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:45:07,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:45:07,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:45:07,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:45:07,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:07,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:09,517 INFO L138 Inliner]: procedures = 710, calls = 701, calls flagged for inlining = 597, calls inlined = 597, statements flattened = 108769 [2022-11-25 15:45:09,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:45:09,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:45:09,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:45:09,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:45:09,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:09,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:09,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:09,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:10,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:11,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:11,447 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:11,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:11,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:45:11,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:45:11,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:45:11,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:45:11,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (1/1) ... [2022-11-25 15:45:11,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:45:11,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:11,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:45:11,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fa0e1ff-539f-4f0f-8c8d-f1e47370dde6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:45:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:45:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:45:11,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:45:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-25 15:45:11,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-25 15:45:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-25 15:45:11,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-25 15:45:11,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:45:12,565 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:45:12,567 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:45:39,746 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:45:39,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:45:39,806 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 15:45:39,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:45:39 BoogieIcfgContainer [2022-11-25 15:45:39,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:45:39,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:45:39,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:45:39,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:45:39,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:44:42" (1/3) ... [2022-11-25 15:45:39,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc6cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:45:39, skipping insertion in model container [2022-11-25 15:45:39,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:45:07" (2/3) ... [2022-11-25 15:45:39,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc6cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:45:39, skipping insertion in model container [2022-11-25 15:45:39,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:45:39" (3/3) ... [2022-11-25 15:45:39,833 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13.c [2022-11-25 15:45:39,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:45:39,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 15:45:40,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:45:40,035 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;@4bd33bb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:45:40,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:45:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-25 15:45:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 15:45:40,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:40,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:40,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1914797321, now seen corresponding path program 1 times [2022-11-25 15:45:40,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:40,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169602694] [2022-11-25 15:45:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:40,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169602694] [2022-11-25 15:45:40,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169602694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:40,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:40,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:45:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968442008] [2022-11-25 15:45:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:45:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:41,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:45:41,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:45:41,065 INFO L87 Difference]: Start difference. First operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:57,326 INFO L93 Difference]: Finished difference Result 9556 states and 17573 transitions. [2022-11-25 15:45:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:45:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 15:45:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:57,389 INFO L225 Difference]: With dead ends: 9556 [2022-11-25 15:45:57,389 INFO L226 Difference]: Without dead ends: 6016 [2022-11-25 15:45:57,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:45:57,406 INFO L413 NwaCegarLoop]: 6282 mSDtfsCounter, 4900 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 7368 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4900 SdHoareTripleChecker+Valid, 9603 SdHoareTripleChecker+Invalid, 7981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 7368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:57,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4900 Valid, 9603 Invalid, 7981 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [613 Valid, 7368 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2022-11-25 15:45:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-11-25 15:45:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5245. [2022-11-25 15:45:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5143 states have (on average 1.7841726618705036) internal successors, (9176), 5242 states have internal predecessors, (9176), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 9276 transitions. [2022-11-25 15:45:57,711 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 9276 transitions. Word has length 13 [2022-11-25 15:45:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:57,712 INFO L495 AbstractCegarLoop]: Abstraction has 5245 states and 9276 transitions. [2022-11-25 15:45:57,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 9276 transitions. [2022-11-25 15:45:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 15:45:57,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:57,725 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] [2022-11-25 15:45:57,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:45:57,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash -873779178, now seen corresponding path program 1 times [2022-11-25 15:45:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:57,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470674194] [2022-11-25 15:45:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470674194] [2022-11-25 15:45:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470674194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:58,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:58,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:45:58,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823420629] [2022-11-25 15:45:58,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:58,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:45:58,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:45:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:45:58,186 INFO L87 Difference]: Start difference. First operand 5245 states and 9276 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:08,536 INFO L93 Difference]: Finished difference Result 11853 states and 20876 transitions. [2022-11-25 15:46:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:46:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-25 15:46:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:08,564 INFO L225 Difference]: With dead ends: 11853 [2022-11-25 15:46:08,564 INFO L226 Difference]: Without dead ends: 6610 [2022-11-25 15:46:08,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:46:08,572 INFO L413 NwaCegarLoop]: 6516 mSDtfsCounter, 1948 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 9812 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:08,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 9812 Invalid, 4757 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [255 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-25 15:46:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2022-11-25 15:46:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6115. [2022-11-25 15:46:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6115 states, 6013 states have (on average 1.7490437385664395) internal successors, (10517), 6112 states have internal predecessors, (10517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6115 states to 6115 states and 10617 transitions. [2022-11-25 15:46:08,755 INFO L78 Accepts]: Start accepts. Automaton has 6115 states and 10617 transitions. Word has length 22 [2022-11-25 15:46:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:08,760 INFO L495 AbstractCegarLoop]: Abstraction has 6115 states and 10617 transitions. [2022-11-25 15:46:08,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6115 states and 10617 transitions. [2022-11-25 15:46:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 15:46:08,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:08,764 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, 1, 1] [2022-11-25 15:46:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:46:08,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2028786272, now seen corresponding path program 1 times [2022-11-25 15:46:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758090654] [2022-11-25 15:46:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:08,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:08,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758090654] [2022-11-25 15:46:08,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758090654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:08,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:08,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:46:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123602545] [2022-11-25 15:46:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:46:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:46:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:08,955 INFO L87 Difference]: Start difference. First operand 6115 states and 10617 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:09,440 INFO L93 Difference]: Finished difference Result 17808 states and 30942 transitions. [2022-11-25 15:46:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:46:09,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 15:46:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:09,514 INFO L225 Difference]: With dead ends: 17808 [2022-11-25 15:46:09,514 INFO L226 Difference]: Without dead ends: 11695 [2022-11-25 15:46:09,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:09,529 INFO L413 NwaCegarLoop]: 6287 mSDtfsCounter, 6151 mSDsluCounter, 6031 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6151 SdHoareTripleChecker+Valid, 12318 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:09,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6151 Valid, 12318 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:46:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11695 states. [2022-11-25 15:46:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11695 to 11596. [2022-11-25 15:46:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11494 states have (on average 1.7502175047851052) internal successors, (20117), 11593 states have internal predecessors, (20117), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 20217 transitions. [2022-11-25 15:46:09,867 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 20217 transitions. Word has length 32 [2022-11-25 15:46:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:09,867 INFO L495 AbstractCegarLoop]: Abstraction has 11596 states and 20217 transitions. [2022-11-25 15:46:09,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 20217 transitions. [2022-11-25 15:46:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 15:46:09,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:09,870 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, 1, 1] [2022-11-25 15:46:09,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:46:09,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash 342220768, now seen corresponding path program 1 times [2022-11-25 15:46:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15524174] [2022-11-25 15:46:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:09,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:10,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15524174] [2022-11-25 15:46:10,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15524174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:10,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:10,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:46:10,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371331440] [2022-11-25 15:46:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:46:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:46:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:10,037 INFO L87 Difference]: Start difference. First operand 11596 states and 20217 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:11,355 INFO L93 Difference]: Finished difference Result 34103 states and 59476 transitions. [2022-11-25 15:46:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:46:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 15:46:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:11,420 INFO L225 Difference]: With dead ends: 34103 [2022-11-25 15:46:11,420 INFO L226 Difference]: Without dead ends: 22509 [2022-11-25 15:46:11,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:11,440 INFO L413 NwaCegarLoop]: 6759 mSDtfsCounter, 5698 mSDsluCounter, 5872 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5698 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:11,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5698 Valid, 12631 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 15:46:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2022-11-25 15:46:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 22396. [2022-11-25 15:46:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22396 states, 22294 states have (on average 1.7489459047277294) internal successors, (38991), 22393 states have internal predecessors, (38991), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22396 states to 22396 states and 39091 transitions. [2022-11-25 15:46:12,124 INFO L78 Accepts]: Start accepts. Automaton has 22396 states and 39091 transitions. Word has length 32 [2022-11-25 15:46:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:12,125 INFO L495 AbstractCegarLoop]: Abstraction has 22396 states and 39091 transitions. [2022-11-25 15:46:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 22396 states and 39091 transitions. [2022-11-25 15:46:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 15:46:12,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:12,129 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, 1, 1, 1] [2022-11-25 15:46:12,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:46:12,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:12,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2018208297, now seen corresponding path program 1 times [2022-11-25 15:46:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:12,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864621914] [2022-11-25 15:46:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:12,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864621914] [2022-11-25 15:46:12,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864621914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:12,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:12,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:46:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959573699] [2022-11-25 15:46:12,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:12,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:46:12,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:46:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:12,298 INFO L87 Difference]: Start difference. First operand 22396 states and 39091 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:12,777 INFO L93 Difference]: Finished difference Result 66961 states and 116860 transitions. [2022-11-25 15:46:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:46:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 15:46:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:12,918 INFO L225 Difference]: With dead ends: 66961 [2022-11-25 15:46:12,918 INFO L226 Difference]: Without dead ends: 44567 [2022-11-25 15:46:12,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:12,956 INFO L413 NwaCegarLoop]: 6276 mSDtfsCounter, 6144 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:12,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6144 Valid, 12488 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:46:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44567 states. [2022-11-25 15:46:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44567 to 44464. [2022-11-25 15:46:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44464 states, 44362 states have (on average 1.747937423921374) internal successors, (77542), 44461 states have internal predecessors, (77542), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44464 states to 44464 states and 77642 transitions. [2022-11-25 15:46:13,816 INFO L78 Accepts]: Start accepts. Automaton has 44464 states and 77642 transitions. Word has length 33 [2022-11-25 15:46:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:13,816 INFO L495 AbstractCegarLoop]: Abstraction has 44464 states and 77642 transitions. [2022-11-25 15:46:13,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 44464 states and 77642 transitions. [2022-11-25 15:46:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 15:46:13,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:13,823 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, 1, 1, 1, 1] [2022-11-25 15:46:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:46:13,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1860746363, now seen corresponding path program 1 times [2022-11-25 15:46:13,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:13,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309534268] [2022-11-25 15:46:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:13,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:14,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309534268] [2022-11-25 15:46:14,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309534268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:14,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:14,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:46:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687802534] [2022-11-25 15:46:14,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:14,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:46:14,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:46:14,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:14,016 INFO L87 Difference]: Start difference. First operand 44464 states and 77642 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:21,992 INFO L93 Difference]: Finished difference Result 117524 states and 207236 transitions. [2022-11-25 15:46:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:46:21,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-25 15:46:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:22,190 INFO L225 Difference]: With dead ends: 117524 [2022-11-25 15:46:22,190 INFO L226 Difference]: Without dead ends: 73062 [2022-11-25 15:46:22,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:22,257 INFO L413 NwaCegarLoop]: 7496 mSDtfsCounter, 4604 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 11841 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:22,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4604 Valid, 11841 Invalid, 2924 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2122 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-25 15:46:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73062 states. [2022-11-25 15:46:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73062 to 71260. [2022-11-25 15:46:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71260 states, 71158 states have (on average 1.7639337811630456) internal successors, (125518), 71257 states have internal predecessors, (125518), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71260 states to 71260 states and 125618 transitions. [2022-11-25 15:46:24,071 INFO L78 Accepts]: Start accepts. Automaton has 71260 states and 125618 transitions. Word has length 34 [2022-11-25 15:46:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:24,072 INFO L495 AbstractCegarLoop]: Abstraction has 71260 states and 125618 transitions. [2022-11-25 15:46:24,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71260 states and 125618 transitions. [2022-11-25 15:46:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 15:46:24,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:24,075 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, 1, 1, 1, 1, 1] [2022-11-25 15:46:24,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:46:24,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1849249746, now seen corresponding path program 1 times [2022-11-25 15:46:24,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:24,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546481841] [2022-11-25 15:46:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:24,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:24,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:24,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546481841] [2022-11-25 15:46:24,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546481841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:24,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:24,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:46:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405551648] [2022-11-25 15:46:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:46:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:46:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:24,324 INFO L87 Difference]: Start difference. First operand 71260 states and 125618 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:26,084 INFO L93 Difference]: Finished difference Result 211126 states and 372228 transitions. [2022-11-25 15:46:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:46:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-25 15:46:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:27,445 INFO L225 Difference]: With dead ends: 211126 [2022-11-25 15:46:27,459 INFO L226 Difference]: Without dead ends: 139868 [2022-11-25 15:46:27,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:27,522 INFO L413 NwaCegarLoop]: 6345 mSDtfsCounter, 6023 mSDsluCounter, 6083 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6023 SdHoareTripleChecker+Valid, 12428 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:27,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6023 Valid, 12428 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 15:46:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139868 states. [2022-11-25 15:46:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139868 to 139762. [2022-11-25 15:46:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139762 states, 139660 states have (on average 1.7631390519833883) internal successors, (246240), 139759 states have internal predecessors, (246240), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139762 states to 139762 states and 246340 transitions. [2022-11-25 15:46:30,989 INFO L78 Accepts]: Start accepts. Automaton has 139762 states and 246340 transitions. Word has length 35 [2022-11-25 15:46:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:30,989 INFO L495 AbstractCegarLoop]: Abstraction has 139762 states and 246340 transitions. [2022-11-25 15:46:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 139762 states and 246340 transitions. [2022-11-25 15:46:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 15:46:30,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:30,993 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, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:30,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:46:30,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash 900277528, now seen corresponding path program 1 times [2022-11-25 15:46:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863739930] [2022-11-25 15:46:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:30,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:31,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863739930] [2022-11-25 15:46:31,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863739930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:31,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:31,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:46:31,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77192831] [2022-11-25 15:46:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:31,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:46:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:46:31,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:46:31,326 INFO L87 Difference]: Start difference. First operand 139762 states and 246340 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:47,034 INFO L93 Difference]: Finished difference Result 320985 states and 565547 transitions. [2022-11-25 15:46:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:46:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-25 15:46:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:47,432 INFO L225 Difference]: With dead ends: 320985 [2022-11-25 15:46:47,433 INFO L226 Difference]: Without dead ends: 181225 [2022-11-25 15:46:47,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:46:47,902 INFO L413 NwaCegarLoop]: 7251 mSDtfsCounter, 4585 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 6645 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4585 SdHoareTripleChecker+Valid, 10914 SdHoareTripleChecker+Invalid, 7064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 6645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:47,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4585 Valid, 10914 Invalid, 7064 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [419 Valid, 6645 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-11-25 15:46:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181225 states. [2022-11-25 15:46:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181225 to 169162. [2022-11-25 15:46:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169162 states, 169060 states have (on average 1.747143026144564) internal successors, (295372), 169159 states have internal predecessors, (295372), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169162 states to 169162 states and 295472 transitions. [2022-11-25 15:46:51,551 INFO L78 Accepts]: Start accepts. Automaton has 169162 states and 295472 transitions. Word has length 36 [2022-11-25 15:46:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:51,567 INFO L495 AbstractCegarLoop]: Abstraction has 169162 states and 295472 transitions. [2022-11-25 15:46:51,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:46:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 169162 states and 295472 transitions. [2022-11-25 15:46:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 15:46:51,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:51,577 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:46:51,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash 965683763, now seen corresponding path program 1 times [2022-11-25 15:46:51,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:51,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557947011] [2022-11-25 15:46:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:51,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:46:51,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:51,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557947011] [2022-11-25 15:46:51,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557947011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:46:51,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:46:51,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:46:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58418344] [2022-11-25 15:46:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:46:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:46:51,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:46:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:46:51,868 INFO L87 Difference]: Start difference. First operand 169162 states and 295472 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:47:00,618 INFO L93 Difference]: Finished difference Result 400496 states and 702364 transitions. [2022-11-25 15:47:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:47:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 15:47:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:47:01,469 INFO L225 Difference]: With dead ends: 400496 [2022-11-25 15:47:01,469 INFO L226 Difference]: Without dead ends: 231336 [2022-11-25 15:47:01,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:47:01,580 INFO L413 NwaCegarLoop]: 9874 mSDtfsCounter, 4490 mSDsluCounter, 4418 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 14292 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:47:01,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4490 Valid, 14292 Invalid, 2751 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [894 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-25 15:47:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231336 states. [2022-11-25 15:47:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231336 to 222318. [2022-11-25 15:47:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222318 states, 222216 states have (on average 1.7468364114195198) internal successors, (388175), 222315 states have internal predecessors, (388175), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222318 states to 222318 states and 388275 transitions. [2022-11-25 15:47:06,043 INFO L78 Accepts]: Start accepts. Automaton has 222318 states and 388275 transitions. Word has length 37 [2022-11-25 15:47:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:47:06,044 INFO L495 AbstractCegarLoop]: Abstraction has 222318 states and 388275 transitions. [2022-11-25 15:47:06,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:47:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 222318 states and 388275 transitions. [2022-11-25 15:47:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 15:47:06,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:47:06,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:47:06,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:47:06,046 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:47:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:47:06,047 INFO L85 PathProgramCache]: Analyzing trace with hash -620431340, now seen corresponding path program 1 times [2022-11-25 15:47:06,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:47:06,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171692269] [2022-11-25 15:47:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:47:06,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:47:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:47:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:47:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:47:06,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171692269] [2022-11-25 15:47:06,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171692269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:47:06,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:47:06,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:47:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268408170] [2022-11-25 15:47:06,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:47:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:47:06,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:47:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:47:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:47:06,371 INFO L87 Difference]: Start difference. First operand 222318 states and 388275 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)