./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL --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 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:09:35,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:09:35,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:09:35,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:09:35,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:09:35,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:09:35,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:09:36,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:09:36,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:09:36,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:09:36,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:09:36,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:09:36,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:09:36,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:09:36,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:09:36,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:09:36,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:09:36,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:09:36,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:09:36,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:09:36,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:09:36,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:09:36,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:09:36,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:09:36,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:09:36,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:09:36,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:09:36,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:09:36,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:09:36,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:09:36,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:09:36,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:09:36,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:09:36,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:09:36,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:09:36,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:09:36,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:09:36,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:09:36,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:09:36,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:09:36,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:09:36,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:09:36,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:09:36,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:09:36,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:09:36,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:09:36,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:09:36,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:09:36,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:09:36,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:09:36,089 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:09:36,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:09:36,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:09:36,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:09:36,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:09:36,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:09:36,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:09:36,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:09:36,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:09:36,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:09:36,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:09:36,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:09:36,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:09:36,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:09:36,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:09:36,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:09:36,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:09:36,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:09:36,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:09:36,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:09:36,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:09:36,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:09:36,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:09:36,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:09:36,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:09:36,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:09:36,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 [2021-11-19 04:09:36,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:09:36,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:09:36,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:09:36,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:09:36,435 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:09:36,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2021-11-19 04:09:36,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/data/0e46dfb26/c37d1612135c4b4c9448daa47c87970a/FLAGa69eaddda [2021-11-19 04:09:36,996 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:09:36,996 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2021-11-19 04:09:37,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/data/0e46dfb26/c37d1612135c4b4c9448daa47c87970a/FLAGa69eaddda [2021-11-19 04:09:37,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/data/0e46dfb26/c37d1612135c4b4c9448daa47c87970a [2021-11-19 04:09:37,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:09:37,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:09:37,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:09:37,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:09:37,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:09:37,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe263b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37, skipping insertion in model container [2021-11-19 04:09:37,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:09:37,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:09:37,636 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c[646,659] [2021-11-19 04:09:37,750 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:09:37,759 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:09:37,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c[646,659] [2021-11-19 04:09:37,834 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:09:37,856 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:09:37,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37 WrapperNode [2021-11-19 04:09:37,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:09:37,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:09:37,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:09:37,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:09:37,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,962 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 856 [2021-11-19 04:09:37,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:09:37,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:09:37,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:09:37,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:09:37,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:38,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:38,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:38,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:38,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:09:38,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:09:38,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:09:38,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:09:38,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:09:38,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:38,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:09:38,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:09:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:09:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:09:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-19 04:09:38,126 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-19 04:09:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:09:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:09:38,221 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:09:38,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:09:39,154 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:09:39,174 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:09:39,174 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-19 04:09:39,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:39 BoogieIcfgContainer [2021-11-19 04:09:39,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:09:39,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:09:39,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:09:39,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:09:39,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:09:37" (1/3) ... [2021-11-19 04:09:39,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4204acc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:39, skipping insertion in model container [2021-11-19 04:09:39,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37" (2/3) ... [2021-11-19 04:09:39,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4204acc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:39, skipping insertion in model container [2021-11-19 04:09:39,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:39" (3/3) ... [2021-11-19 04:09:39,193 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.3.cil.c [2021-11-19 04:09:39,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:09:39,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:09:39,279 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:09:39,289 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:09:39,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:09:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 275 states, 267 states have (on average 1.853932584269663) internal successors, (495), 273 states have internal predecessors, (495), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:09:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:09:39,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:39,346 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:09:39,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 193087219, now seen corresponding path program 1 times [2021-11-19 04:09:39,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:39,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97813006] [2021-11-19 04:09:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:39,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:39,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:39,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97813006] [2021-11-19 04:09:39,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97813006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:39,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:39,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131878816] [2021-11-19 04:09:39,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:39,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:39,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:39,683 INFO L87 Difference]: Start difference. First operand has 275 states, 267 states have (on average 1.853932584269663) internal successors, (495), 273 states have internal predecessors, (495), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-19 04:09:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:40,111 INFO L93 Difference]: Finished difference Result 724 states and 1329 transitions. [2021-11-19 04:09:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:40,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 29 [2021-11-19 04:09:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:40,139 INFO L225 Difference]: With dead ends: 724 [2021-11-19 04:09:40,139 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 04:09:40,147 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:40,152 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 263 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:40,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 781 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:09:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 04:09:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2021-11-19 04:09:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 427 states have (on average 1.5971896955503513) internal successors, (682), 431 states have internal predecessors, (682), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 687 transitions. [2021-11-19 04:09:40,266 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 687 transitions. Word has length 29 [2021-11-19 04:09:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:40,271 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 687 transitions. [2021-11-19 04:09:40,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-11-19 04:09:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 687 transitions. [2021-11-19 04:09:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:09:40,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:40,280 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:09:40,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:09:40,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2107562570, now seen corresponding path program 1 times [2021-11-19 04:09:40,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:40,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868076880] [2021-11-19 04:09:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:40,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:40,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:40,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868076880] [2021-11-19 04:09:40,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868076880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:40,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:40,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:40,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615662041] [2021-11-19 04:09:40,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:40,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:40,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:40,349 INFO L87 Difference]: Start difference. First operand 433 states and 687 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-19 04:09:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:40,499 INFO L93 Difference]: Finished difference Result 1137 states and 1829 transitions. [2021-11-19 04:09:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2021-11-19 04:09:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:40,504 INFO L225 Difference]: With dead ends: 1137 [2021-11-19 04:09:40,505 INFO L226 Difference]: Without dead ends: 718 [2021-11-19 04:09:40,511 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:40,513 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 326 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:40,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1024 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:09:40,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-11-19 04:09:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 705. [2021-11-19 04:09:40,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 699 states have (on average 1.6309012875536482) internal successors, (1140), 703 states have internal predecessors, (1140), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1145 transitions. [2021-11-19 04:09:40,589 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1145 transitions. Word has length 39 [2021-11-19 04:09:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:40,591 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1145 transitions. [2021-11-19 04:09:40,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-19 04:09:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1145 transitions. [2021-11-19 04:09:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:09:40,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:40,597 INFO L514 BasicCegarLoop]: 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] [2021-11-19 04:09:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:09:40,598 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash 639754325, now seen corresponding path program 1 times [2021-11-19 04:09:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:40,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804511943] [2021-11-19 04:09:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:40,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:40,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:40,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804511943] [2021-11-19 04:09:40,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804511943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:40,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:40,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:40,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899026737] [2021-11-19 04:09:40,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:40,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:40,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:40,708 INFO L87 Difference]: Start difference. First operand 705 states and 1145 transitions. Second operand has 3 states, 3 states have (on average 13.0) 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) [2021-11-19 04:09:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:40,772 INFO L93 Difference]: Finished difference Result 1777 states and 2884 transitions. [2021-11-19 04:09:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) 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) Word has length 40 [2021-11-19 04:09:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:40,790 INFO L225 Difference]: With dead ends: 1777 [2021-11-19 04:09:40,790 INFO L226 Difference]: Without dead ends: 1097 [2021-11-19 04:09:40,792 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:40,801 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 353 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:40,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 813 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-11-19 04:09:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1086. [2021-11-19 04:09:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1080 states have (on average 1.6203703703703705) internal successors, (1750), 1084 states have internal predecessors, (1750), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1755 transitions. [2021-11-19 04:09:40,853 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1755 transitions. Word has length 40 [2021-11-19 04:09:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1755 transitions. [2021-11-19 04:09:40,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) 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) [2021-11-19 04:09:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1755 transitions. [2021-11-19 04:09:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:09:40,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:40,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:40,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:09:40,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2131746944, now seen corresponding path program 1 times [2021-11-19 04:09:40,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:40,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570559846] [2021-11-19 04:09:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:40,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:40,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:40,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570559846] [2021-11-19 04:09:40,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570559846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:40,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:40,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:09:40,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620400359] [2021-11-19 04:09:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:40,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:09:40,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:09:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:09:40,930 INFO L87 Difference]: Start difference. First operand 1086 states and 1755 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-19 04:09:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:41,340 INFO L93 Difference]: Finished difference Result 2994 states and 4815 transitions. [2021-11-19 04:09:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:09:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 48 [2021-11-19 04:09:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:41,358 INFO L225 Difference]: With dead ends: 2994 [2021-11-19 04:09:41,359 INFO L226 Difference]: Without dead ends: 1933 [2021-11-19 04:09:41,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:09:41,367 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 584 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:41,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1566 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:09:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-11-19 04:09:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1700. [2021-11-19 04:09:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1694 states have (on average 1.5950413223140496) internal successors, (2702), 1698 states have internal predecessors, (2702), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2707 transitions. [2021-11-19 04:09:41,453 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2707 transitions. Word has length 48 [2021-11-19 04:09:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:41,454 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 2707 transitions. [2021-11-19 04:09:41,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-19 04:09:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2707 transitions. [2021-11-19 04:09:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:09:41,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:41,458 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:41,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:09:41,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1086799200, now seen corresponding path program 1 times [2021-11-19 04:09:41,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:41,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438155123] [2021-11-19 04:09:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:41,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:41,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:41,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438155123] [2021-11-19 04:09:41,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438155123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:41,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:41,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:09:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594721292] [2021-11-19 04:09:41,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:41,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:09:41,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:09:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:09:41,575 INFO L87 Difference]: Start difference. First operand 1700 states and 2707 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-19 04:09:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:42,059 INFO L93 Difference]: Finished difference Result 5049 states and 7944 transitions. [2021-11-19 04:09:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:09:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 53 [2021-11-19 04:09:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:42,082 INFO L225 Difference]: With dead ends: 5049 [2021-11-19 04:09:42,082 INFO L226 Difference]: Without dead ends: 3368 [2021-11-19 04:09:42,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:09:42,086 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 742 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:42,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1056 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:09:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-11-19 04:09:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2994. [2021-11-19 04:09:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2988 states have (on average 1.5686077643908969) internal successors, (4687), 2992 states have internal predecessors, (4687), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4692 transitions. [2021-11-19 04:09:42,260 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4692 transitions. Word has length 53 [2021-11-19 04:09:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:42,265 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 4692 transitions. [2021-11-19 04:09:42,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-11-19 04:09:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4692 transitions. [2021-11-19 04:09:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:09:42,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:42,268 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:42,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:09:42,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1057984937, now seen corresponding path program 1 times [2021-11-19 04:09:42,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:42,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379543961] [2021-11-19 04:09:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:42,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:42,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:42,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379543961] [2021-11-19 04:09:42,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379543961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:42,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:42,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:42,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114279676] [2021-11-19 04:09:42,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:42,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:42,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:42,375 INFO L87 Difference]: Start difference. First operand 2994 states and 4692 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-19 04:09:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:42,565 INFO L93 Difference]: Finished difference Result 7033 states and 10981 transitions. [2021-11-19 04:09:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 53 [2021-11-19 04:09:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:42,590 INFO L225 Difference]: With dead ends: 7033 [2021-11-19 04:09:42,590 INFO L226 Difference]: Without dead ends: 4062 [2021-11-19 04:09:42,597 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:42,598 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 368 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:42,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 712 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2021-11-19 04:09:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 3878. [2021-11-19 04:09:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3872 states have (on average 1.5488119834710743) internal successors, (5997), 3876 states have internal predecessors, (5997), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 6002 transitions. [2021-11-19 04:09:42,826 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 6002 transitions. Word has length 53 [2021-11-19 04:09:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:42,827 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 6002 transitions. [2021-11-19 04:09:42,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-19 04:09:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 6002 transitions. [2021-11-19 04:09:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 04:09:42,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:42,830 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:42,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:09:42,831 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -225924857, now seen corresponding path program 1 times [2021-11-19 04:09:42,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:42,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487784308] [2021-11-19 04:09:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:42,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:42,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:42,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487784308] [2021-11-19 04:09:42,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487784308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:42,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:42,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:42,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768426846] [2021-11-19 04:09:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:42,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:42,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:42,896 INFO L87 Difference]: Start difference. First operand 3878 states and 6002 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-19 04:09:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:43,322 INFO L93 Difference]: Finished difference Result 9322 states and 14548 transitions. [2021-11-19 04:09:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 60 [2021-11-19 04:09:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:43,354 INFO L225 Difference]: With dead ends: 9322 [2021-11-19 04:09:43,354 INFO L226 Difference]: Without dead ends: 5467 [2021-11-19 04:09:43,361 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:43,362 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 250 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:43,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 881 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:09:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-11-19 04:09:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 4698. [2021-11-19 04:09:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4692 states have (on average 1.4919011082693947) internal successors, (7000), 4696 states have internal predecessors, (7000), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 7005 transitions. [2021-11-19 04:09:43,634 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 7005 transitions. Word has length 60 [2021-11-19 04:09:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:43,634 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 7005 transitions. [2021-11-19 04:09:43,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-19 04:09:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 7005 transitions. [2021-11-19 04:09:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:09:43,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:43,638 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:43,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:09:43,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash -188990245, now seen corresponding path program 1 times [2021-11-19 04:09:43,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:43,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784494423] [2021-11-19 04:09:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:43,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:43,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:43,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784494423] [2021-11-19 04:09:43,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784494423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:43,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:43,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:43,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667799459] [2021-11-19 04:09:43,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:43,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:43,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:43,719 INFO L87 Difference]: Start difference. First operand 4698 states and 7005 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2021-11-19 04:09:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:43,970 INFO L93 Difference]: Finished difference Result 9239 states and 13787 transitions. [2021-11-19 04:09:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:43,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 62 [2021-11-19 04:09:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:43,998 INFO L225 Difference]: With dead ends: 9239 [2021-11-19 04:09:43,999 INFO L226 Difference]: Without dead ends: 4564 [2021-11-19 04:09:44,007 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:44,008 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 345 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:44,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 443 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-11-19 04:09:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 4564. [2021-11-19 04:09:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4558 states have (on average 1.4697235629662133) internal successors, (6699), 4562 states have internal predecessors, (6699), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 6704 transitions. [2021-11-19 04:09:44,254 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 6704 transitions. Word has length 62 [2021-11-19 04:09:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:44,255 INFO L470 AbstractCegarLoop]: Abstraction has 4564 states and 6704 transitions. [2021-11-19 04:09:44,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2021-11-19 04:09:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 6704 transitions. [2021-11-19 04:09:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:09:44,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:44,259 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:44,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:09:44,260 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1119920945, now seen corresponding path program 1 times [2021-11-19 04:09:44,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:44,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568042977] [2021-11-19 04:09:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:44,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:44,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:44,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568042977] [2021-11-19 04:09:44,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568042977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:44,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:44,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:44,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017947623] [2021-11-19 04:09:44,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:44,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:44,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:44,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:44,307 INFO L87 Difference]: Start difference. First operand 4564 states and 6704 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-19 04:09:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:44,571 INFO L93 Difference]: Finished difference Result 9772 states and 14526 transitions. [2021-11-19 04:09:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 63 [2021-11-19 04:09:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:44,612 INFO L225 Difference]: With dead ends: 9772 [2021-11-19 04:09:44,612 INFO L226 Difference]: Without dead ends: 5231 [2021-11-19 04:09:44,619 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:44,621 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 309 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:44,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1002 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2021-11-19 04:09:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 3514. [2021-11-19 04:09:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3508 states have (on average 1.4871721778791334) internal successors, (5217), 3512 states have internal predecessors, (5217), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5222 transitions. [2021-11-19 04:09:44,850 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5222 transitions. Word has length 63 [2021-11-19 04:09:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:44,850 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 5222 transitions. [2021-11-19 04:09:44,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-19 04:09:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5222 transitions. [2021-11-19 04:09:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:09:44,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:44,852 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:44,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:09:44,852 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1680343550, now seen corresponding path program 1 times [2021-11-19 04:09:44,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:44,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014598781] [2021-11-19 04:09:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:44,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:44,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:44,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014598781] [2021-11-19 04:09:44,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014598781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:44,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:44,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:09:44,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394539376] [2021-11-19 04:09:44,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:44,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:09:44,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:09:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:44,924 INFO L87 Difference]: Start difference. First operand 3514 states and 5222 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2021-11-19 04:09:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:46,128 INFO L93 Difference]: Finished difference Result 16672 states and 24585 transitions. [2021-11-19 04:09:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:09:46,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 65 [2021-11-19 04:09:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:46,206 INFO L225 Difference]: With dead ends: 16672 [2021-11-19 04:09:46,206 INFO L226 Difference]: Without dead ends: 13383 [2021-11-19 04:09:46,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:09:46,214 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 2113 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:46,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 4025 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:09:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13383 states. [2021-11-19 04:09:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13383 to 4384. [2021-11-19 04:09:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4378 states have (on average 1.479899497487437) internal successors, (6479), 4382 states have internal predecessors, (6479), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 6484 transitions. [2021-11-19 04:09:46,561 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 6484 transitions. Word has length 65 [2021-11-19 04:09:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:46,562 INFO L470 AbstractCegarLoop]: Abstraction has 4384 states and 6484 transitions. [2021-11-19 04:09:46,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2021-11-19 04:09:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 6484 transitions. [2021-11-19 04:09:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-19 04:09:46,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:46,565 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:46,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:09:46,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash -807318558, now seen corresponding path program 1 times [2021-11-19 04:09:46,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:46,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027051233] [2021-11-19 04:09:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:46,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:46,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:46,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027051233] [2021-11-19 04:09:46,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027051233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:46,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:46,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:09:46,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290053398] [2021-11-19 04:09:46,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:46,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:09:46,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:09:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:09:46,646 INFO L87 Difference]: Start difference. First operand 4384 states and 6484 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2021-11-19 04:09:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:48,599 INFO L93 Difference]: Finished difference Result 30283 states and 44507 transitions. [2021-11-19 04:09:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:09:48,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 66 [2021-11-19 04:09:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:48,672 INFO L225 Difference]: With dead ends: 30283 [2021-11-19 04:09:48,673 INFO L226 Difference]: Without dead ends: 26124 [2021-11-19 04:09:48,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:09:48,686 INFO L933 BasicCegarLoop]: 1877 mSDtfsCounter, 3813 mSDsluCounter, 6758 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 8635 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:48,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3813 Valid, 8635 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:09:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26124 states. [2021-11-19 04:09:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26124 to 4694. [2021-11-19 04:09:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4688 states have (on average 1.4699232081911262) internal successors, (6891), 4692 states have internal predecessors, (6891), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 6896 transitions. [2021-11-19 04:09:49,257 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 6896 transitions. Word has length 66 [2021-11-19 04:09:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:49,258 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 6896 transitions. [2021-11-19 04:09:49,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2021-11-19 04:09:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 6896 transitions. [2021-11-19 04:09:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 04:09:49,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:49,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:49,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:09:49,264 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash 365229683, now seen corresponding path program 1 times [2021-11-19 04:09:49,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:49,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572026546] [2021-11-19 04:09:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:49,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:49,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:49,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572026546] [2021-11-19 04:09:49,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572026546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:49,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:49,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:49,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160199066] [2021-11-19 04:09:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:49,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:49,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:49,305 INFO L87 Difference]: Start difference. First operand 4694 states and 6896 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-11-19 04:09:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:49,689 INFO L93 Difference]: Finished difference Result 9887 states and 14496 transitions. [2021-11-19 04:09:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:49,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 79 [2021-11-19 04:09:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:49,702 INFO L225 Difference]: With dead ends: 9887 [2021-11-19 04:09:49,702 INFO L226 Difference]: Without dead ends: 5214 [2021-11-19 04:09:49,709 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:49,710 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 135 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:49,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 818 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:09:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-11-19 04:09:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5140. [2021-11-19 04:09:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 5134 states have (on average 1.4649396182313985) internal successors, (7521), 5138 states have internal predecessors, (7521), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7526 transitions. [2021-11-19 04:09:50,098 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7526 transitions. Word has length 79 [2021-11-19 04:09:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:50,098 INFO L470 AbstractCegarLoop]: Abstraction has 5140 states and 7526 transitions. [2021-11-19 04:09:50,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-11-19 04:09:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7526 transitions. [2021-11-19 04:09:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 04:09:50,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:50,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:50,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:09:50,103 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:50,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1737999967, now seen corresponding path program 1 times [2021-11-19 04:09:50,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:50,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306027747] [2021-11-19 04:09:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:50,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:50,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:50,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306027747] [2021-11-19 04:09:50,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306027747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:50,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:50,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:09:50,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295762555] [2021-11-19 04:09:50,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:50,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:09:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:09:50,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:09:50,139 INFO L87 Difference]: Start difference. First operand 5140 states and 7526 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 04:09:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:50,837 INFO L93 Difference]: Finished difference Result 13742 states and 19960 transitions. [2021-11-19 04:09:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:09:50,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 91 [2021-11-19 04:09:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:50,862 INFO L225 Difference]: With dead ends: 13742 [2021-11-19 04:09:50,863 INFO L226 Difference]: Without dead ends: 8501 [2021-11-19 04:09:50,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:09:50,874 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 650 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:50,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 1264 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:09:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-11-19 04:09:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 7603. [2021-11-19 04:09:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7603 states, 7597 states have (on average 1.4359615637751744) internal successors, (10909), 7601 states have internal predecessors, (10909), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7603 states to 7603 states and 10914 transitions. [2021-11-19 04:09:51,405 INFO L78 Accepts]: Start accepts. Automaton has 7603 states and 10914 transitions. Word has length 91 [2021-11-19 04:09:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:51,406 INFO L470 AbstractCegarLoop]: Abstraction has 7603 states and 10914 transitions. [2021-11-19 04:09:51,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-19 04:09:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7603 states and 10914 transitions. [2021-11-19 04:09:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 04:09:51,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:51,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:51,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:09:51,410 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1393219568, now seen corresponding path program 1 times [2021-11-19 04:09:51,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:51,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824200227] [2021-11-19 04:09:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:51,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:51,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:51,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824200227] [2021-11-19 04:09:51,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824200227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:51,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:51,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:09:51,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857399192] [2021-11-19 04:09:51,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:51,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:51,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:51,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:51,447 INFO L87 Difference]: Start difference. First operand 7603 states and 10914 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2021-11-19 04:09:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:51,671 INFO L93 Difference]: Finished difference Result 10973 states and 15786 transitions. [2021-11-19 04:09:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:51,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 99 [2021-11-19 04:09:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:51,680 INFO L225 Difference]: With dead ends: 10973 [2021-11-19 04:09:51,681 INFO L226 Difference]: Without dead ends: 3373 [2021-11-19 04:09:51,692 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:09:51,693 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 339 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:51,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 521 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-11-19 04:09:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3320. [2021-11-19 04:09:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3314 states have (on average 1.347616173808087) internal successors, (4466), 3318 states have internal predecessors, (4466), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4471 transitions. [2021-11-19 04:09:51,965 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4471 transitions. Word has length 99 [2021-11-19 04:09:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 4471 transitions. [2021-11-19 04:09:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2021-11-19 04:09:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4471 transitions. [2021-11-19 04:09:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:09:51,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:51,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:09:51,968 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 759271656, now seen corresponding path program 1 times [2021-11-19 04:09:51,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:51,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220602092] [2021-11-19 04:09:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:51,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:52,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:52,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220602092] [2021-11-19 04:09:52,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220602092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:52,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:52,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:09:52,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941323693] [2021-11-19 04:09:52,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:52,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:09:52,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:09:52,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:09:52,022 INFO L87 Difference]: Start difference. First operand 3320 states and 4471 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-11-19 04:09:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:52,655 INFO L93 Difference]: Finished difference Result 12700 states and 17100 transitions. [2021-11-19 04:09:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:09:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 101 [2021-11-19 04:09:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:52,675 INFO L225 Difference]: With dead ends: 12700 [2021-11-19 04:09:52,675 INFO L226 Difference]: Without dead ends: 9557 [2021-11-19 04:09:52,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:09:52,684 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 1536 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 3386 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:52,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 3386 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:09:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2021-11-19 04:09:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 3322. [2021-11-19 04:09:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3316 states have (on average 1.3455971049457178) internal successors, (4462), 3320 states have internal predecessors, (4462), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4467 transitions. [2021-11-19 04:09:53,052 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4467 transitions. Word has length 101 [2021-11-19 04:09:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:53,053 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 4467 transitions. [2021-11-19 04:09:53,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-11-19 04:09:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4467 transitions. [2021-11-19 04:09:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 04:09:53,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:53,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:53,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:09:53,056 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1438592349, now seen corresponding path program 1 times [2021-11-19 04:09:53,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:53,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960698184] [2021-11-19 04:09:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:53,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:53,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960698184] [2021-11-19 04:09:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960698184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:09:53,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121383398] [2021-11-19 04:09:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:53,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:53,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:09:53,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:09:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:09:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:53,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:09:53,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121383398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:53,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:09:53,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-19 04:09:53,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426411236] [2021-11-19 04:09:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:53,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:53,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:53,564 INFO L87 Difference]: Start difference. First operand 3322 states and 4467 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-11-19 04:09:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:53,826 INFO L93 Difference]: Finished difference Result 3961 states and 5320 transitions. [2021-11-19 04:09:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:53,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 103 [2021-11-19 04:09:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:53,835 INFO L225 Difference]: With dead ends: 3961 [2021-11-19 04:09:53,835 INFO L226 Difference]: Without dead ends: 3957 [2021-11-19 04:09:53,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:53,838 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 233 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:53,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 803 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-11-19 04:09:54,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3907. [2021-11-19 04:09:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3901 states have (on average 1.3424762881312484) internal successors, (5237), 3905 states have internal predecessors, (5237), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 5242 transitions. [2021-11-19 04:09:54,168 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 5242 transitions. Word has length 103 [2021-11-19 04:09:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:54,169 INFO L470 AbstractCegarLoop]: Abstraction has 3907 states and 5242 transitions. [2021-11-19 04:09:54,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-11-19 04:09:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 5242 transitions. [2021-11-19 04:09:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 04:09:54,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:54,174 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:54,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:54,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:09:54,390 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash 778344586, now seen corresponding path program 1 times [2021-11-19 04:09:54,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:54,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129332848] [2021-11-19 04:09:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:54,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:54,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:54,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129332848] [2021-11-19 04:09:54,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129332848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:09:54,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878586818] [2021-11-19 04:09:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:54,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:54,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:09:54,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:09:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:09:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:54,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:09:54,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878586818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:54,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:09:54,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-19 04:09:54,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207580327] [2021-11-19 04:09:54,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:54,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:54,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:54,967 INFO L87 Difference]: Start difference. First operand 3907 states and 5242 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-19 04:09:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:55,274 INFO L93 Difference]: Finished difference Result 6958 states and 9384 transitions. [2021-11-19 04:09:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 158 [2021-11-19 04:09:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:55,278 INFO L225 Difference]: With dead ends: 6958 [2021-11-19 04:09:55,279 INFO L226 Difference]: Without dead ends: 3056 [2021-11-19 04:09:55,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:55,286 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 264 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:55,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 422 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-11-19 04:09:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2834. [2021-11-19 04:09:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.322135785007072) internal successors, (3739), 2832 states have internal predecessors, (3739), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3744 transitions. [2021-11-19 04:09:55,545 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3744 transitions. Word has length 158 [2021-11-19 04:09:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:55,546 INFO L470 AbstractCegarLoop]: Abstraction has 2834 states and 3744 transitions. [2021-11-19 04:09:55,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-11-19 04:09:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3744 transitions. [2021-11-19 04:09:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 04:09:55,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:55,549 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:55,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:55,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:09:55,766 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1723152090, now seen corresponding path program 1 times [2021-11-19 04:09:55,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:55,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523994598] [2021-11-19 04:09:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:55,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:55,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:55,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523994598] [2021-11-19 04:09:55,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523994598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:09:55,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111357855] [2021-11-19 04:09:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:55,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:55,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:55,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:09:55,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:09:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:55,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:09:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:09:56,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:09:56,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111357855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:56,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:09:56,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-19 04:09:56,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73181852] [2021-11-19 04:09:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:56,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:56,224 INFO L87 Difference]: Start difference. First operand 2834 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-11-19 04:09:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:56,476 INFO L93 Difference]: Finished difference Result 5496 states and 7301 transitions. [2021-11-19 04:09:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 161 [2021-11-19 04:09:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:56,480 INFO L225 Difference]: With dead ends: 5496 [2021-11-19 04:09:56,481 INFO L226 Difference]: Without dead ends: 2834 [2021-11-19 04:09:56,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:56,485 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 274 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:56,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 394 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:09:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-11-19 04:09:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2834. [2021-11-19 04:09:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.2881895332390383) internal successors, (3643), 2832 states have internal predecessors, (3643), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3648 transitions. [2021-11-19 04:09:56,708 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3648 transitions. Word has length 161 [2021-11-19 04:09:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:56,709 INFO L470 AbstractCegarLoop]: Abstraction has 2834 states and 3648 transitions. [2021-11-19 04:09:56,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-11-19 04:09:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3648 transitions. [2021-11-19 04:09:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 04:09:56,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:56,712 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:56,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:56,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:09:56,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash 901617889, now seen corresponding path program 1 times [2021-11-19 04:09:56,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:56,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044657685] [2021-11-19 04:09:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:56,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:56,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:56,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044657685] [2021-11-19 04:09:56,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044657685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:09:56,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039080002] [2021-11-19 04:09:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:56,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:56,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:09:57,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:09:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:09:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:09:57,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:09:57,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039080002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:57,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:09:57,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-19 04:09:57,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091187244] [2021-11-19 04:09:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:57,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:57,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:57,395 INFO L87 Difference]: Start difference. First operand 2834 states and 3648 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-11-19 04:09:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:57,883 INFO L93 Difference]: Finished difference Result 6407 states and 8410 transitions. [2021-11-19 04:09:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 162 [2021-11-19 04:09:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:57,889 INFO L225 Difference]: With dead ends: 6407 [2021-11-19 04:09:57,889 INFO L226 Difference]: Without dead ends: 3745 [2021-11-19 04:09:57,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:57,894 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 205 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:57,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 664 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:09:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-19 04:09:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3657. [2021-11-19 04:09:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3651 states have (on average 1.256368118323747) internal successors, (4587), 3655 states have internal predecessors, (4587), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:09:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 4592 transitions. [2021-11-19 04:09:58,155 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 4592 transitions. Word has length 162 [2021-11-19 04:09:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 3657 states and 4592 transitions. [2021-11-19 04:09:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-11-19 04:09:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 4592 transitions. [2021-11-19 04:09:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 04:09:58,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:58,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:58,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:58,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:58,382 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:09:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash -89319700, now seen corresponding path program 1 times [2021-11-19 04:09:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:09:58,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819693948] [2021-11-19 04:09:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:58,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:09:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:58,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:09:58,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819693948] [2021-11-19 04:09:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819693948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:09:58,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295569909] [2021-11-19 04:09:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:58,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:09:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:58,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:09:58,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:09:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:58,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:09:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:59,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:09:59,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295569909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:09:59,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:09:59,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-11-19 04:09:59,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325796155] [2021-11-19 04:09:59,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:09:59,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:09:59,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:09:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:09:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:09:59,641 INFO L87 Difference]: Start difference. First operand 3657 states and 4592 transitions. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2021-11-19 04:10:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:01,545 INFO L93 Difference]: Finished difference Result 18372 states and 23167 transitions. [2021-11-19 04:10:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:10:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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 164 [2021-11-19 04:10:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:01,563 INFO L225 Difference]: With dead ends: 18372 [2021-11-19 04:10:01,563 INFO L226 Difference]: Without dead ends: 14887 [2021-11-19 04:10:01,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 337 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:10:01,571 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 4105 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4105 SdHoareTripleChecker+Valid, 5617 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:01,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4105 Valid, 5617 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:10:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14887 states. [2021-11-19 04:10:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14887 to 5182. [2021-11-19 04:10:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5176 states have (on average 1.2612055641421946) internal successors, (6528), 5180 states have internal predecessors, (6528), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 6533 transitions. [2021-11-19 04:10:01,956 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 6533 transitions. Word has length 164 [2021-11-19 04:10:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:01,956 INFO L470 AbstractCegarLoop]: Abstraction has 5182 states and 6533 transitions. [2021-11-19 04:10:01,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 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) [2021-11-19 04:10:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 6533 transitions. [2021-11-19 04:10:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-19 04:10:01,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:01,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:02,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:10:02,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:02,178 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1160504422, now seen corresponding path program 1 times [2021-11-19 04:10:02,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:02,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305143868] [2021-11-19 04:10:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:02,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:10:02,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:02,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305143868] [2021-11-19 04:10:02,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305143868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:02,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683118432] [2021-11-19 04:10:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:02,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:02,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:02,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:10:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:10:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:10:03,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:10:04,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683118432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:10:04,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:10:04,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-11-19 04:10:04,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595328116] [2021-11-19 04:10:04,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:10:04,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:10:04,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:10:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:10:04,656 INFO L87 Difference]: Start difference. First operand 5182 states and 6533 transitions. Second operand has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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) [2021-11-19 04:10:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:06,986 INFO L93 Difference]: Finished difference Result 23920 states and 30076 transitions. [2021-11-19 04:10:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 04:10:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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 264 [2021-11-19 04:10:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:07,013 INFO L225 Difference]: With dead ends: 23920 [2021-11-19 04:10:07,014 INFO L226 Difference]: Without dead ends: 18910 [2021-11-19 04:10:07,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 541 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:10:07,022 INFO L933 BasicCegarLoop]: 1466 mSDtfsCounter, 5735 mSDsluCounter, 10170 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5735 SdHoareTripleChecker+Valid, 11636 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:07,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5735 Valid, 11636 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:10:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18910 states. [2021-11-19 04:10:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18910 to 6581. [2021-11-19 04:10:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6575 states have (on average 1.2622053231939163) internal successors, (8299), 6579 states have internal predecessors, (8299), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 8304 transitions. [2021-11-19 04:10:07,616 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 8304 transitions. Word has length 264 [2021-11-19 04:10:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:07,617 INFO L470 AbstractCegarLoop]: Abstraction has 6581 states and 8304 transitions. [2021-11-19 04:10:07,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 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) [2021-11-19 04:10:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 8304 transitions. [2021-11-19 04:10:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-19 04:10:07,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:07,622 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:07,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:10:07,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:07,837 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1649884656, now seen corresponding path program 1 times [2021-11-19 04:10:07,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:07,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307240811] [2021-11-19 04:10:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:07,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 268 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:10:07,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:07,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307240811] [2021-11-19 04:10:07,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307240811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:07,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970497271] [2021-11-19 04:10:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:07,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:07,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:08,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:10:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:08,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:10:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:10:08,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:10:08,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970497271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:10:08,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:10:08,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 11 [2021-11-19 04:10:08,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865655236] [2021-11-19 04:10:08,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:10:08,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:10:08,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:10:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:10:08,878 INFO L87 Difference]: Start difference. First operand 6581 states and 8304 transitions. Second operand has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 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) [2021-11-19 04:10:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:09,852 INFO L93 Difference]: Finished difference Result 14921 states and 18796 transitions. [2021-11-19 04:10:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:10:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 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 365 [2021-11-19 04:10:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:09,861 INFO L225 Difference]: With dead ends: 14921 [2021-11-19 04:10:09,861 INFO L226 Difference]: Without dead ends: 8509 [2021-11-19 04:10:09,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:10:09,867 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 2073 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 4071 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:09,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 4071 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:10:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8509 states. [2021-11-19 04:10:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8509 to 6450. [2021-11-19 04:10:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6444 states have (on average 1.260552451893234) internal successors, (8123), 6448 states have internal predecessors, (8123), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 8128 transitions. [2021-11-19 04:10:10,362 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 8128 transitions. Word has length 365 [2021-11-19 04:10:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:10,362 INFO L470 AbstractCegarLoop]: Abstraction has 6450 states and 8128 transitions. [2021-11-19 04:10:10,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 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) [2021-11-19 04:10:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 8128 transitions. [2021-11-19 04:10:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-19 04:10:10,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:10,366 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:10,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-19 04:10:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 04:10:10,566 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 212538691, now seen corresponding path program 1 times [2021-11-19 04:10:10,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:10,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106049783] [2021-11-19 04:10:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:10,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-19 04:10:10,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:10,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106049783] [2021-11-19 04:10:10,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106049783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:10:10,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:10:10,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:10:10,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827373344] [2021-11-19 04:10:10,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:10:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:10:10,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:10:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:10:10,644 INFO L87 Difference]: Start difference. First operand 6450 states and 8128 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-11-19 04:10:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:10,880 INFO L93 Difference]: Finished difference Result 7707 states and 9551 transitions. [2021-11-19 04:10:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:10:10,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 366 [2021-11-19 04:10:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:10,882 INFO L225 Difference]: With dead ends: 7707 [2021-11-19 04:10:10,883 INFO L226 Difference]: Without dead ends: 1310 [2021-11-19 04:10:10,886 INFO L932 BasicCegarLoop]: 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 [2021-11-19 04:10:10,887 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 134 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:10,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 396 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:10:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-11-19 04:10:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1307. [2021-11-19 04:10:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1303 states have (on average 1.091327705295472) internal successors, (1422), 1305 states have internal predecessors, (1422), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1425 transitions. [2021-11-19 04:10:10,994 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1425 transitions. Word has length 366 [2021-11-19 04:10:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:10,995 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 1425 transitions. [2021-11-19 04:10:10,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-11-19 04:10:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1425 transitions. [2021-11-19 04:10:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-11-19 04:10:10,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:10,998 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:10,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:10:10,998 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1278053055, now seen corresponding path program 1 times [2021-11-19 04:10:10,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:10,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835266269] [2021-11-19 04:10:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:10,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-19 04:10:11,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:11,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835266269] [2021-11-19 04:10:11,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835266269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:10:11,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:10:11,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:10:11,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642882036] [2021-11-19 04:10:11,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:10:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:10:11,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:11,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:10:11,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:10:11,100 INFO L87 Difference]: Start difference. First operand 1307 states and 1425 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2021-11-19 04:10:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:11,443 INFO L93 Difference]: Finished difference Result 2682 states and 2939 transitions. [2021-11-19 04:10:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:10:11,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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 367 [2021-11-19 04:10:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:11,474 INFO L225 Difference]: With dead ends: 2682 [2021-11-19 04:10:11,474 INFO L226 Difference]: Without dead ends: 2177 [2021-11-19 04:10:11,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:10:11,477 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 906 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:11,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 2474 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:10:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-11-19 04:10:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1303. [2021-11-19 04:10:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1299 states have (on average 1.0869899923017705) internal successors, (1412), 1301 states have internal predecessors, (1412), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1415 transitions. [2021-11-19 04:10:11,605 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1415 transitions. Word has length 367 [2021-11-19 04:10:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:11,606 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1415 transitions. [2021-11-19 04:10:11,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2021-11-19 04:10:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1415 transitions. [2021-11-19 04:10:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-19 04:10:11,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:11,608 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:11,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:10:11,609 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:11,610 INFO L85 PathProgramCache]: Analyzing trace with hash -393422015, now seen corresponding path program 1 times [2021-11-19 04:10:11,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:11,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383616461] [2021-11-19 04:10:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:11,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-19 04:10:11,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383616461] [2021-11-19 04:10:11,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383616461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:10:11,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:10:11,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:10:11,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120738130] [2021-11-19 04:10:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:10:11,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:10:11,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:10:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:10:11,700 INFO L87 Difference]: Start difference. First operand 1303 states and 1415 transitions. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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) [2021-11-19 04:10:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:11,999 INFO L93 Difference]: Finished difference Result 2148 states and 2344 transitions. [2021-11-19 04:10:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:10:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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 368 [2021-11-19 04:10:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:12,002 INFO L225 Difference]: With dead ends: 2148 [2021-11-19 04:10:12,002 INFO L226 Difference]: Without dead ends: 1641 [2021-11-19 04:10:12,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:10:12,004 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 438 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:12,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 925 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:10:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-19 04:10:12,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1272. [2021-11-19 04:10:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1269 states have (on average 1.0654058313632782) internal successors, (1352), 1270 states have internal predecessors, (1352), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1354 transitions. [2021-11-19 04:10:12,136 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1354 transitions. Word has length 368 [2021-11-19 04:10:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:12,137 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1354 transitions. [2021-11-19 04:10:12,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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) [2021-11-19 04:10:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1354 transitions. [2021-11-19 04:10:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-19 04:10:12,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:12,140 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:12,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:10:12,140 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1783235049, now seen corresponding path program 1 times [2021-11-19 04:10:12,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:12,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715829672] [2021-11-19 04:10:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:12,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 66 proven. 229 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-19 04:10:12,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:12,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715829672] [2021-11-19 04:10:12,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715829672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:12,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493908152] [2021-11-19 04:10:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:12,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:12,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:12,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:10:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 04:10:12,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 68 proven. 193 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-11-19 04:10:14,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 20 proven. 241 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-11-19 04:10:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493908152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:10:15,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:10:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-11-19 04:10:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22860641] [2021-11-19 04:10:15,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:10:15,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:10:15,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:10:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:10:15,213 INFO L87 Difference]: Start difference. First operand 1272 states and 1354 transitions. Second operand has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 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) [2021-11-19 04:10:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:16,176 INFO L93 Difference]: Finished difference Result 1594 states and 1700 transitions. [2021-11-19 04:10:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:10:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 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 426 [2021-11-19 04:10:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:16,178 INFO L225 Difference]: With dead ends: 1594 [2021-11-19 04:10:16,178 INFO L226 Difference]: Without dead ends: 1591 [2021-11-19 04:10:16,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 845 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 04:10:16,180 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 2563 mSDsluCounter, 6928 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:16,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2563 Valid, 7321 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:10:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-11-19 04:10:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1272. [2021-11-19 04:10:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1269 states have (on average 1.0646178092986605) internal successors, (1351), 1270 states have internal predecessors, (1351), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1353 transitions. [2021-11-19 04:10:16,301 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1353 transitions. Word has length 426 [2021-11-19 04:10:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:16,301 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1353 transitions. [2021-11-19 04:10:16,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 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) [2021-11-19 04:10:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1353 transitions. [2021-11-19 04:10:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-19 04:10:16,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:16,306 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:16,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 04:10:16,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:10:16,510 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:16,510 INFO L85 PathProgramCache]: Analyzing trace with hash 147062529, now seen corresponding path program 1 times [2021-11-19 04:10:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:16,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298954765] [2021-11-19 04:10:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:16,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-11-19 04:10:16,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:16,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298954765] [2021-11-19 04:10:16,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298954765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:16,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452982072] [2021-11-19 04:10:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:16,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:16,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:16,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:10:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:10:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-11-19 04:10:17,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-11-19 04:10:18,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452982072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:10:18,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:10:18,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-11-19 04:10:18,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206727468] [2021-11-19 04:10:18,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:10:18,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:10:18,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:18,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:10:18,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:10:18,714 INFO L87 Difference]: Start difference. First operand 1272 states and 1353 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 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) [2021-11-19 04:10:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:19,077 INFO L93 Difference]: Finished difference Result 1915 states and 2040 transitions. [2021-11-19 04:10:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:10:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 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 474 [2021-11-19 04:10:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:19,079 INFO L225 Difference]: With dead ends: 1915 [2021-11-19 04:10:19,079 INFO L226 Difference]: Without dead ends: 1621 [2021-11-19 04:10:19,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 951 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:10:19,081 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 1121 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:19,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 3355 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:10:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-11-19 04:10:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1270. [2021-11-19 04:10:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1267 states have (on average 1.0599842146803473) internal successors, (1343), 1268 states have internal predecessors, (1343), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1345 transitions. [2021-11-19 04:10:19,203 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1345 transitions. Word has length 474 [2021-11-19 04:10:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:19,204 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1345 transitions. [2021-11-19 04:10:19,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 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) [2021-11-19 04:10:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1345 transitions. [2021-11-19 04:10:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-11-19 04:10:19,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:19,210 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:19,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:10:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:10:19,426 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1610767197, now seen corresponding path program 1 times [2021-11-19 04:10:19,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:19,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314864534] [2021-11-19 04:10:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:19,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 126 proven. 575 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 04:10:19,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:19,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314864534] [2021-11-19 04:10:19,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314864534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:19,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351881765] [2021-11-19 04:10:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:19,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:19,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:19,906 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:19,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:10:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:20,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 04:10:20,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 167 proven. 516 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:10:22,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 25 proven. 658 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:10:23,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351881765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:10:23,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:10:23,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-11-19 04:10:23,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896564385] [2021-11-19 04:10:23,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:10:23,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 04:10:23,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:23,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 04:10:23,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:10:23,160 INFO L87 Difference]: Start difference. First operand 1270 states and 1345 transitions. Second operand has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 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) [2021-11-19 04:10:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:24,255 INFO L93 Difference]: Finished difference Result 1523 states and 1615 transitions. [2021-11-19 04:10:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 04:10:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 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 534 [2021-11-19 04:10:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:24,258 INFO L225 Difference]: With dead ends: 1523 [2021-11-19 04:10:24,258 INFO L226 Difference]: Without dead ends: 1520 [2021-11-19 04:10:24,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1065 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 04:10:24,260 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 2787 mSDsluCounter, 13408 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 14040 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:24,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2787 Valid, 14040 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:10:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-11-19 04:10:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1270. [2021-11-19 04:10:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1267 states have (on average 1.059194948697711) internal successors, (1342), 1268 states have internal predecessors, (1342), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1344 transitions. [2021-11-19 04:10:24,388 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1344 transitions. Word has length 534 [2021-11-19 04:10:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1344 transitions. [2021-11-19 04:10:24,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 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) [2021-11-19 04:10:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1344 transitions. [2021-11-19 04:10:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-11-19 04:10:24,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:24,392 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:24,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:10:24,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 04:10:24,593 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1331699829, now seen corresponding path program 1 times [2021-11-19 04:10:24,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:24,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833383966] [2021-11-19 04:10:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:24,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 04:10:24,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:24,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833383966] [2021-11-19 04:10:24,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833383966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:24,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732562895] [2021-11-19 04:10:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:24,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:24,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:24,834 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:24,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:10:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:10:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 04:10:26,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 04:10:27,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732562895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:10:27,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:10:27,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-11-19 04:10:27,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859040314] [2021-11-19 04:10:27,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:10:27,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:10:27,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:10:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:10:27,565 INFO L87 Difference]: Start difference. First operand 1270 states and 1344 transitions. Second operand has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 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) [2021-11-19 04:10:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:28,018 INFO L93 Difference]: Finished difference Result 1630 states and 1731 transitions. [2021-11-19 04:10:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:10:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 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 582 [2021-11-19 04:10:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:28,021 INFO L225 Difference]: With dead ends: 1630 [2021-11-19 04:10:28,021 INFO L226 Difference]: Without dead ends: 1526 [2021-11-19 04:10:28,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1169 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:10:28,023 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1204 mSDsluCounter, 4545 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 5194 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:28,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 5194 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:10:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-11-19 04:10:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1269. [2021-11-19 04:10:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1267 states have (on average 1.0544593528018942) internal successors, (1336), 1267 states have internal predecessors, (1336), 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) [2021-11-19 04:10:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1337 transitions. [2021-11-19 04:10:28,215 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1337 transitions. Word has length 582 [2021-11-19 04:10:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:28,215 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 1337 transitions. [2021-11-19 04:10:28,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 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) [2021-11-19 04:10:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1337 transitions. [2021-11-19 04:10:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2021-11-19 04:10:28,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:10:28,220 INFO L514 BasicCegarLoop]: trace histogram [12, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:10:28,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:10:28,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 04:10:28,421 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:10:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:10:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash 707297678, now seen corresponding path program 1 times [2021-11-19 04:10:28,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:10:28,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150008179] [2021-11-19 04:10:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:28,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:10:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 83 proven. 1033 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:10:29,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:10:29,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150008179] [2021-11-19 04:10:29,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150008179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:10:29,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385186223] [2021-11-19 04:10:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:10:29,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:10:29,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:10:29,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:10:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:10:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-19 04:10:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:10:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 174 proven. 942 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:10:31,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 30 proven. 1086 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:10:33,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385186223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:10:33,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:10:33,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2021-11-19 04:10:33,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596280089] [2021-11-19 04:10:33,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:10:33,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 04:10:33,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:10:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 04:10:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 04:10:33,255 INFO L87 Difference]: Start difference. First operand 1269 states and 1337 transitions. Second operand has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 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) [2021-11-19 04:10:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:10:34,715 INFO L93 Difference]: Finished difference Result 1526 states and 1612 transitions. [2021-11-19 04:10:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 04:10:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 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 643 [2021-11-19 04:10:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:10:34,717 INFO L225 Difference]: With dead ends: 1526 [2021-11-19 04:10:34,717 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 04:10:34,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1289 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=608, Invalid=5712, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 04:10:34,721 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 3599 mSDsluCounter, 19463 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 20265 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:10:34,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3599 Valid, 20265 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:10:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 04:10:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 04:10:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:10:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 04:10:34,723 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 643 [2021-11-19 04:10:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:10:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 04:10:34,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 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) [2021-11-19 04:10:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 04:10:34,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 04:10:34,727 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 04:10:34,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:10:34,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10eaf8bb-a435-4aaa-bb41-90dfcf786728/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:10:34,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 04:10:48,523 WARN L227 SmtUtils]: Spent 12.47s on a formula simplification. DAG size of input: 440 DAG size of output: 440 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:11:08,968 WARN L227 SmtUtils]: Spent 20.44s on a formula simplification. DAG size of input: 448 DAG size of output: 448 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 04:11:21,058 WARN L227 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 440 DAG size of output: 440 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)