./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ --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 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:48:54,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:48:54,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:48:54,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:48:54,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:48:54,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:48:54,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:48:54,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:48:54,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:48:54,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:48:54,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:48:54,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:48:54,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:48:54,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:48:54,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:48:54,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:48:54,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:48:54,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:48:54,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:48:54,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:48:54,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:48:54,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:48:54,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:48:54,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:48:54,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:48:54,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:48:54,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:48:54,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:48:54,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:48:54,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:48:54,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:48:54,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:48:54,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:48:54,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:48:54,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:48:54,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:48:54,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:48:54,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:48:54,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:48:54,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:48:54,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:48:54,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:48:55,036 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:48:55,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:48:55,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:48:55,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:48:55,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:48:55,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:48:55,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:48:55,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:48:55,038 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:48:55,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:48:55,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:48:55,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:48:55,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:48:55,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:48:55,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:48:55,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:48:55,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:48:55,040 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:48:55,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:48:55,041 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:48:55,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:48:55,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:48:55,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:48:55,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:48:55,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:48:55,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:48:55,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:48:55,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:48:55,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:48:55,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:48:55,058 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:48:55,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:48:55,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:48:55,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 [2022-10-17 10:48:55,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:48:55,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:48:55,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:48:55,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:48:55,306 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:48:55,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/loop-acceleration/nested_1-2.c [2022-10-17 10:48:55,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/data/ca81e6600/fda49b897f274b58ac9d73e5eca3465d/FLAG369099ff7 [2022-10-17 10:48:55,755 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:48:55,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2022-10-17 10:48:55,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/data/ca81e6600/fda49b897f274b58ac9d73e5eca3465d/FLAG369099ff7 [2022-10-17 10:48:56,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/data/ca81e6600/fda49b897f274b58ac9d73e5eca3465d [2022-10-17 10:48:56,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:48:56,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:48:56,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:48:56,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:48:56,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:48:56,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6d4dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56, skipping insertion in model container [2022-10-17 10:48:56,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:48:56,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:48:56,353 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_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2022-10-17 10:48:56,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:48:56,373 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:48:56,385 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_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2022-10-17 10:48:56,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:48:56,401 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:48:56,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56 WrapperNode [2022-10-17 10:48:56,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:48:56,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:48:56,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:48:56,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:48:56,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,433 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-10-17 10:48:56,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:48:56,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:48:56,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:48:56,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:48:56,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:48:56,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:48:56,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:48:56,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:48:56,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (1/1) ... [2022-10-17 10:48:56,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:48:56,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:48:56,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:48:56,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:48:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:48:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:48:56,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:48:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:48:56,603 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:48:56,605 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:48:56,768 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:48:56,774 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:48:56,774 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:48:56,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:48:56 BoogieIcfgContainer [2022-10-17 10:48:56,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:48:56,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:48:56,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:48:56,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:48:56,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:48:56" (1/3) ... [2022-10-17 10:48:56,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1d749d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:48:56, skipping insertion in model container [2022-10-17 10:48:56,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:48:56" (2/3) ... [2022-10-17 10:48:56,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1d749d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:48:56, skipping insertion in model container [2022-10-17 10:48:56,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:48:56" (3/3) ... [2022-10-17 10:48:56,786 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2022-10-17 10:48:56,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:48:56,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:48:56,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:48:56,861 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6691b84f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:48:56,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:48:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:48:56,879 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:48:56,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:48:56,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:48:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:48:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2022-10-17 10:48:56,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:48:56,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538935539] [2022-10-17 10:48:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:48:56,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:48:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:48:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:48:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:48:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538935539] [2022-10-17 10:48:57,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538935539] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:48:57,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:48:57,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:48:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54210830] [2022-10-17 10:48:57,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:48:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:48:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:48:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:48:57,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:48:57,284 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:48:57,313 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2022-10-17 10:48:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:48:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:48:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:48:57,334 INFO L225 Difference]: With dead ends: 27 [2022-10-17 10:48:57,335 INFO L226 Difference]: Without dead ends: 12 [2022-10-17 10:48:57,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:48:57,342 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:48:57,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:48:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-10-17 10:48:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-10-17 10:48:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-10-17 10:48:57,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-10-17 10:48:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:48:57,385 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-10-17 10:48:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-10-17 10:48:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:48:57,386 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:48:57,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:48:57,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:48:57,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:48:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:48:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2022-10-17 10:48:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:48:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710416951] [2022-10-17 10:48:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:48:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:48:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:48:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:48:57,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:48:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710416951] [2022-10-17 10:48:57,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710416951] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:48:57,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:48:57,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:48:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567526972] [2022-10-17 10:48:57,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:48:57,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:48:57,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:48:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:48:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:48:57,488 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:48:57,498 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-10-17 10:48:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:48:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:48:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:48:57,499 INFO L225 Difference]: With dead ends: 18 [2022-10-17 10:48:57,499 INFO L226 Difference]: Without dead ends: 11 [2022-10-17 10:48:57,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:48:57,502 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:48:57,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:48:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-10-17 10:48:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-10-17 10:48:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-10-17 10:48:57,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2022-10-17 10:48:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:48:57,507 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-10-17 10:48:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-10-17 10:48:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:48:57,508 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:48:57,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:48:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:48:57,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:48:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:48:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2022-10-17 10:48:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:48:57,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726186457] [2022-10-17 10:48:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:48:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:48:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:48:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:48:57,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:48:57,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726186457] [2022-10-17 10:48:57,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726186457] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:48:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131398499] [2022-10-17 10:48:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:48:57,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:48:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:48:57,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:48:57,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:48:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:48:57,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:48:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:48:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:48:57,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:48:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:48:57,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131398499] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:48:57,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:48:57,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-10-17 10:48:57,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502172730] [2022-10-17 10:48:57,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:48:57,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:48:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:48:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:48:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:48:57,919 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:48:58,163 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-10-17 10:48:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:48:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:48:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:48:58,165 INFO L225 Difference]: With dead ends: 35 [2022-10-17 10:48:58,165 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 10:48:58,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:48:58,175 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:48:58,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:48:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 10:48:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-10-17 10:48:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-10-17 10:48:58,200 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2022-10-17 10:48:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:48:58,200 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-10-17 10:48:58,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-10-17 10:48:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:48:58,202 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:48:58,202 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-17 10:48:58,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:48:58,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:48:58,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:48:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:48:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash -738026408, now seen corresponding path program 2 times [2022-10-17 10:48:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:48:58,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581143454] [2022-10-17 10:48:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:48:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:48:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:48:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-10-17 10:48:58,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:48:58,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581143454] [2022-10-17 10:48:58,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581143454] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:48:58,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187638574] [2022-10-17 10:48:58,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:48:58,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:48:58,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:48:58,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:48:58,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:48:58,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:48:58,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:48:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:48:58,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:48:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:48:58,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:48:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 10:48:59,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187638574] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:48:59,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:48:59,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 13 [2022-10-17 10:48:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960971885] [2022-10-17 10:48:59,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:48:59,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 10:48:59,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:48:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 10:48:59,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:48:59,062 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:48:59,533 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2022-10-17 10:48:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-10-17 10:48:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-17 10:48:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:48:59,534 INFO L225 Difference]: With dead ends: 71 [2022-10-17 10:48:59,535 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 10:48:59,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-10-17 10:48:59,537 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:48:59,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 61 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:48:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 10:48:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2022-10-17 10:48:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-10-17 10:48:59,555 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2022-10-17 10:48:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:48:59,556 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-10-17 10:48:59,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:48:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-10-17 10:48:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:48:59,558 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:48:59,559 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-10-17 10:48:59,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:48:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:48:59,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:48:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:48:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1025867325, now seen corresponding path program 3 times [2022-10-17 10:48:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:48:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248534052] [2022-10-17 10:48:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:48:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:48:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:48:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-10-17 10:48:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:48:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248534052] [2022-10-17 10:48:59,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248534052] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:48:59,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108530401] [2022-10-17 10:48:59,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:48:59,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:48:59,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:48:59,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:48:59,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:49:00,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-17 10:49:00,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:49:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-10-17 10:49:00,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-10-17 10:49:00,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108530401] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:00,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:00,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-17 10:49:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953749355] [2022-10-17 10:49:00,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:00,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:49:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:00,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:49:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:49:00,166 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:00,362 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2022-10-17 10:49:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:49:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-17 10:49:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:00,364 INFO L225 Difference]: With dead ends: 92 [2022-10-17 10:49:00,364 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 10:49:00,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:49:00,365 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:00,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:49:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 10:49:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-10-17 10:49:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-10-17 10:49:00,384 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2022-10-17 10:49:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:00,384 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-10-17 10:49:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-10-17 10:49:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-17 10:49:00,387 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:00,387 INFO L195 NwaCegarLoop]: trace histogram [40, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:00,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:00,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:00,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash 251588099, now seen corresponding path program 4 times [2022-10-17 10:49:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401860809] [2022-10-17 10:49:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-10-17 10:49:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401860809] [2022-10-17 10:49:01,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401860809] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341083838] [2022-10-17 10:49:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:49:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:01,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:01,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:01,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:49:01,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:49:01,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-17 10:49:01,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-10-17 10:49:01,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-10-17 10:49:01,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341083838] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:01,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:01,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-10-17 10:49:01,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261348301] [2022-10-17 10:49:01,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:49:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:49:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:49:01,358 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:01,458 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2022-10-17 10:49:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:49:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-10-17 10:49:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:01,460 INFO L225 Difference]: With dead ends: 122 [2022-10-17 10:49:01,460 INFO L226 Difference]: Without dead ends: 72 [2022-10-17 10:49:01,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:49:01,462 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:01,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-17 10:49:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-10-17 10:49:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-10-17 10:49:01,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 61 [2022-10-17 10:49:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:01,484 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-10-17 10:49:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-10-17 10:49:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-17 10:49:01,487 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:01,487 INFO L195 NwaCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:01,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:01,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:01,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 5 times [2022-10-17 10:49:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:01,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747207850] [2022-10-17 10:49:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-10-17 10:49:01,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747207850] [2022-10-17 10:49:01,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747207850] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116963249] [2022-10-17 10:49:01,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:49:01,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:01,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:02,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:49:03,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-10-17 10:49:03,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:49:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-10-17 10:49:03,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-10-17 10:49:03,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116963249] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:03,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:03,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-10-17 10:49:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349483319] [2022-10-17 10:49:03,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:49:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:49:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:49:03,673 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:49:04,295 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2022-10-17 10:49:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:49:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-10-17 10:49:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:49:04,298 INFO L225 Difference]: With dead ends: 180 [2022-10-17 10:49:04,298 INFO L226 Difference]: Without dead ends: 176 [2022-10-17 10:49:04,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:49:04,300 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:49:04,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 117 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:49:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-10-17 10:49:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-10-17 10:49:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.08) internal successors, (189), 175 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 189 transitions. [2022-10-17 10:49:04,380 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 189 transitions. Word has length 71 [2022-10-17 10:49:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:49:04,381 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 189 transitions. [2022-10-17 10:49:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:49:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 189 transitions. [2022-10-17 10:49:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-10-17 10:49:04,393 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:49:04,393 INFO L195 NwaCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-10-17 10:49:04,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:49:04,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:04,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:49:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:49:04,595 INFO L85 PathProgramCache]: Analyzing trace with hash 869335427, now seen corresponding path program 6 times [2022-10-17 10:49:04,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:49:04,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643136245] [2022-10-17 10:49:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:49:04,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:49:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:49:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-10-17 10:49:05,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:49:05,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643136245] [2022-10-17 10:49:05,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643136245] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:49:05,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127735492] [2022-10-17 10:49:05,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:49:05,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:49:05,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:49:05,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:49:05,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4265f4cb-8e2a-4d76-9cfe-a3b2c3f45ce5/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:49:13,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-10-17 10:49:13,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:49:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-17 10:49:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:49:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-10-17 10:49:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:49:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-10-17 10:49:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127735492] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:49:16,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:49:16,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 32 [2022-10-17 10:49:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741400279] [2022-10-17 10:49:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:49:16,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-17 10:49:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:49:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-17 10:49:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-10-17 10:49:16,185 INFO L87 Difference]: Start difference. First operand 176 states and 189 transitions. Second operand has 32 states, 32 states have (on average 3.5625) internal successors, (114), 32 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)