./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:38:18,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:38:18,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:38:18,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:38:18,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:38:18,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:38:18,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:38:18,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:38:18,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:38:18,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:38:18,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:38:18,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:38:18,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:38:18,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:38:18,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:38:18,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:38:18,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:38:18,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:38:18,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:38:18,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:38:18,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:38:18,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:38:18,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:38:18,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:38:18,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:38:18,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:38:18,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:38:18,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:38:18,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:38:18,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:38:18,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:38:18,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:38:18,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:38:18,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:38:18,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:38:18,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:38:18,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:38:18,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:38:18,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:38:18,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:38:18,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:38:18,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:38:18,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:38:18,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:38:18,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:38:18,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:38:18,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:38:18,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:38:18,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:38:18,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:38:18,292 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:38:18,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:38:18,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:38:18,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:38:18,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:38:18,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:38:18,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:38:18,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:38:18,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:38:18,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:38:18,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:38:18,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:38:18,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:38:18,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:38:18,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:38:18,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:38:18,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:38:18,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:38:18,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:38:18,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:38:18,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:38:18,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:38:18,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:38:18,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:38:18,296 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:38:18,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:38:18,296 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:38:18,296 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2022-12-13 13:38:18,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:38:18,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:38:18,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:38:18,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:38:18,510 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:38:18,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-12-13 13:38:21,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:38:21,201 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:38:21,201 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-12-13 13:38:21,205 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/data/73f6c9ef5/7cf675f07eae4a4b898e54fc7f119aa4/FLAG3e8803613 [2022-12-13 13:38:21,605 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/data/73f6c9ef5/7cf675f07eae4a4b898e54fc7f119aa4 [2022-12-13 13:38:21,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:38:21,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:38:21,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:38:21,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:38:21,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:38:21,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c19c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21, skipping insertion in model container [2022-12-13 13:38:21,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:38:21,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:38:21,723 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2022-12-13 13:38:21,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:38:21,743 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:38:21,751 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2022-12-13 13:38:21,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:38:21,768 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:38:21,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21 WrapperNode [2022-12-13 13:38:21,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:38:21,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:38:21,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:38:21,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:38:21,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,794 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-12-13 13:38:21,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:38:21,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:38:21,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:38:21,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:38:21,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:38:21,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:38:21,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:38:21,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:38:21,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (1/1) ... [2022-12-13 13:38:21,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:38:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:21,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:38:21,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:38:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:38:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:38:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:38:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:38:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:38:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:38:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:38:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 13:38:21,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 13:38:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:38:21,937 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:38:21,939 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:38:22,081 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:38:22,086 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:38:22,087 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-13 13:38:22,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:38:22 BoogieIcfgContainer [2022-12-13 13:38:22,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:38:22,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:38:22,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:38:22,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:38:22,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:38:21" (1/3) ... [2022-12-13 13:38:22,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9abff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:38:22, skipping insertion in model container [2022-12-13 13:38:22,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:38:21" (2/3) ... [2022-12-13 13:38:22,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9abff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:38:22, skipping insertion in model container [2022-12-13 13:38:22,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:38:22" (3/3) ... [2022-12-13 13:38:22,096 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2022-12-13 13:38:22,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:38:22,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:38:22,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:38:22,170 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;@4fb131b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:38:22,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:38:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:38:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 13:38:22,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:22,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:22,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2022-12-13 13:38:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:22,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170327291] [2022-12-13 13:38:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:22,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170327291] [2022-12-13 13:38:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170327291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:38:22,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:38:22,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:38:22,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602910291] [2022-12-13 13:38:22,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:38:22,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:38:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:38:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:38:22,396 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:22,469 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2022-12-13 13:38:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:38:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 13:38:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:22,479 INFO L225 Difference]: With dead ends: 96 [2022-12-13 13:38:22,480 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 13:38:22,482 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 [2022-12-13 13:38:22,485 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:22,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:38:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 13:38:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2022-12-13 13:38:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:38:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-12-13 13:38:22,520 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 12 [2022-12-13 13:38:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:22,521 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-12-13 13:38:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-12-13 13:38:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 13:38:22,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:22,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:22,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:38:22,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2022-12-13 13:38:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:22,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871694391] [2022-12-13 13:38:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:22,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:22,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871694391] [2022-12-13 13:38:22,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871694391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:22,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456729728] [2022-12-13 13:38:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:22,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:22,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:22,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:38:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:38:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:38:22,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:38:22,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456729728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:38:22,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:38:22,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 13:38:22,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610131759] [2022-12-13 13:38:22,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:38:22,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:38:22,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:22,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:38:22,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:38:22,689 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:22,729 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2022-12-13 13:38:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:38:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 13:38:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:22,730 INFO L225 Difference]: With dead ends: 86 [2022-12-13 13:38:22,730 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 13:38:22,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:38:22,731 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:22,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:38:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 13:38:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-12-13 13:38:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:38:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-12-13 13:38:22,737 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2022-12-13 13:38:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:22,737 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-12-13 13:38:22,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-12-13 13:38:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 13:38:22,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:22,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:22,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:38:22,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:22,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash -107558025, now seen corresponding path program 1 times [2022-12-13 13:38:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:22,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4511521] [2022-12-13 13:38:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:23,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4511521] [2022-12-13 13:38:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4511521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212853331] [2022-12-13 13:38:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:23,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:23,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:23,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:38:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:38:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:23,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:38:23,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212853331] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:23,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:23,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 13:38:23,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269776281] [2022-12-13 13:38:23,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:23,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:38:23,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:38:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:38:23,192 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:23,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:23,293 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2022-12-13 13:38:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:38:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 13:38:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:23,295 INFO L225 Difference]: With dead ends: 151 [2022-12-13 13:38:23,295 INFO L226 Difference]: Without dead ends: 114 [2022-12-13 13:38:23,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:38:23,297 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 168 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:23,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:38:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-13 13:38:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-12-13 13:38:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 13:38:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2022-12-13 13:38:23,308 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 16 [2022-12-13 13:38:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:23,308 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2022-12-13 13:38:23,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2022-12-13 13:38:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 13:38:23,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:23,309 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:23,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:38:23,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:23,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2071104259, now seen corresponding path program 2 times [2022-12-13 13:38:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:23,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441755800] [2022-12-13 13:38:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:23,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 13:38:23,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441755800] [2022-12-13 13:38:23,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441755800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:38:23,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:38:23,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:38:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936019266] [2022-12-13 13:38:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:38:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:38:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:38:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:38:23,707 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:23,759 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2022-12-13 13:38:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:38:23,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 13:38:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:23,761 INFO L225 Difference]: With dead ends: 212 [2022-12-13 13:38:23,761 INFO L226 Difference]: Without dead ends: 118 [2022-12-13 13:38:23,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:38:23,763 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:23,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 97 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:38:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-13 13:38:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-12-13 13:38:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 13:38:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2022-12-13 13:38:23,772 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 22 [2022-12-13 13:38:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:23,772 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2022-12-13 13:38:23,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2022-12-13 13:38:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 13:38:23,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:23,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:23,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:38:23,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2022-12-13 13:38:23,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:23,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624299337] [2022-12-13 13:38:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:23,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 13:38:23,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624299337] [2022-12-13 13:38:23,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624299337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321261499] [2022-12-13 13:38:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:23,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:23,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:38:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:38:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:38:23,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:38:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321261499] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:24,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:24,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-12-13 13:38:24,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40335301] [2022-12-13 13:38:24,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:24,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:38:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:38:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:38:24,023 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:24,261 INFO L93 Difference]: Finished difference Result 376 states and 540 transitions. [2022-12-13 13:38:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:38:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 13:38:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:24,263 INFO L225 Difference]: With dead ends: 376 [2022-12-13 13:38:24,263 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 13:38:24,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:38:24,265 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 459 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:24,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 265 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:38:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 13:38:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-12-13 13:38:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 242 states have internal predecessors, (327), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-13 13:38:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 369 transitions. [2022-12-13 13:38:24,288 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 369 transitions. Word has length 25 [2022-12-13 13:38:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:24,289 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 369 transitions. [2022-12-13 13:38:24,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 369 transitions. [2022-12-13 13:38:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 13:38:24,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:24,290 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:24,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:38:24,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:24,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash -34194041, now seen corresponding path program 2 times [2022-12-13 13:38:24,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:24,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025811263] [2022-12-13 13:38:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:24,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-13 13:38:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:24,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025811263] [2022-12-13 13:38:24,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025811263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:38:24,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:38:24,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:38:24,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736284630] [2022-12-13 13:38:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:38:24,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:38:24,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:24,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:38:24,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:38:24,678 INFO L87 Difference]: Start difference. First operand 265 states and 369 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:24,719 INFO L93 Difference]: Finished difference Result 485 states and 684 transitions. [2022-12-13 13:38:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:38:24,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 13:38:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:24,721 INFO L225 Difference]: With dead ends: 485 [2022-12-13 13:38:24,722 INFO L226 Difference]: Without dead ends: 260 [2022-12-13 13:38:24,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:38:24,723 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:24,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:38:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-13 13:38:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-12-13 13:38:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 238 states have internal predecessors, (321), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-13 13:38:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 361 transitions. [2022-12-13 13:38:24,749 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 361 transitions. Word has length 40 [2022-12-13 13:38:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:24,749 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 361 transitions. [2022-12-13 13:38:24,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 361 transitions. [2022-12-13 13:38:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 13:38:24,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:24,750 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:24,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:38:24,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1753085294, now seen corresponding path program 1 times [2022-12-13 13:38:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:24,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692372892] [2022-12-13 13:38:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:24,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:24,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:24,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692372892] [2022-12-13 13:38:24,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692372892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:24,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406006593] [2022-12-13 13:38:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:24,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:24,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:38:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:24,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:38:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:25,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406006593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:25,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:25,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 13:38:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905110027] [2022-12-13 13:38:25,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 13:38:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 13:38:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:38:25,203 INFO L87 Difference]: Start difference. First operand 260 states and 361 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:25,695 INFO L93 Difference]: Finished difference Result 785 states and 1130 transitions. [2022-12-13 13:38:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:38:25,696 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-13 13:38:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:25,700 INFO L225 Difference]: With dead ends: 785 [2022-12-13 13:38:25,700 INFO L226 Difference]: Without dead ends: 548 [2022-12-13 13:38:25,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 13:38:25,702 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1297 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:25,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 421 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 13:38:25,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-12-13 13:38:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2022-12-13 13:38:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 502 states have internal predecessors, (681), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-13 13:38:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 769 transitions. [2022-12-13 13:38:25,720 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 769 transitions. Word has length 41 [2022-12-13 13:38:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:25,720 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 769 transitions. [2022-12-13 13:38:25,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 769 transitions. [2022-12-13 13:38:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 13:38:25,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:25,721 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:25,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:38:25,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:25,922 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1772381526, now seen corresponding path program 2 times [2022-12-13 13:38:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:25,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129487305] [2022-12-13 13:38:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:26,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:26,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129487305] [2022-12-13 13:38:26,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129487305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:26,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3473942] [2022-12-13 13:38:26,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:38:26,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:26,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:26,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:38:26,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:38:26,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:38:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 13:38:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:26,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3473942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:27,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-13 13:38:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999335643] [2022-12-13 13:38:27,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 13:38:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 13:38:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 13:38:27,132 INFO L87 Difference]: Start difference. First operand 548 states and 769 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:28,340 INFO L93 Difference]: Finished difference Result 1625 states and 2354 transitions. [2022-12-13 13:38:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 13:38:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-13 13:38:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:28,348 INFO L225 Difference]: With dead ends: 1625 [2022-12-13 13:38:28,348 INFO L226 Difference]: Without dead ends: 1124 [2022-12-13 13:38:28,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 13:38:28,352 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 2646 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:28,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2737 Valid, 942 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 13:38:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-12-13 13:38:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2022-12-13 13:38:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1030 states have (on average 1.3601941747572817) internal successors, (1401), 1030 states have internal predecessors, (1401), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-13 13:38:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1585 transitions. [2022-12-13 13:38:28,399 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1585 transitions. Word has length 65 [2022-12-13 13:38:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:28,399 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1585 transitions. [2022-12-13 13:38:28,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1585 transitions. [2022-12-13 13:38:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 13:38:28,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:28,401 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:28,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:38:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:28,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1315726042, now seen corresponding path program 3 times [2022-12-13 13:38:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353048900] [2022-12-13 13:38:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:29,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353048900] [2022-12-13 13:38:29,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353048900] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523641706] [2022-12-13 13:38:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:38:29,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:29,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:29,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:38:29,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 13:38:29,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:38:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:38:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-12-13 13:38:29,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:38:29,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523641706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:38:29,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:38:29,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 53 [2022-12-13 13:38:29,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827968599] [2022-12-13 13:38:29,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:38:29,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:38:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:29,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:38:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 13:38:29,942 INFO L87 Difference]: Start difference. First operand 1124 states and 1585 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:30,014 INFO L93 Difference]: Finished difference Result 2152 states and 3073 transitions. [2022-12-13 13:38:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:38:30,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-12-13 13:38:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:30,018 INFO L225 Difference]: With dead ends: 2152 [2022-12-13 13:38:30,018 INFO L226 Difference]: Without dead ends: 1139 [2022-12-13 13:38:30,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 13:38:30,021 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:30,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 83 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:38:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-12-13 13:38:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1126. [2022-12-13 13:38:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1032 states have (on average 1.3604651162790697) internal successors, (1404), 1032 states have internal predecessors, (1404), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-13 13:38:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1588 transitions. [2022-12-13 13:38:30,048 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1588 transitions. Word has length 113 [2022-12-13 13:38:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:30,049 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1588 transitions. [2022-12-13 13:38:30,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1588 transitions. [2022-12-13 13:38:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 13:38:30,050 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:30,050 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:30,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:38:30,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 13:38:30,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1995784412, now seen corresponding path program 1 times [2022-12-13 13:38:30,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749104432] [2022-12-13 13:38:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:30,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:31,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749104432] [2022-12-13 13:38:31,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749104432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445751665] [2022-12-13 13:38:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:31,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:31,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:31,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:31,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:38:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 13:38:31,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:31,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:33,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445751665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:33,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:33,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-13 13:38:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806601398] [2022-12-13 13:38:33,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 13:38:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 13:38:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 13:38:33,576 INFO L87 Difference]: Start difference. First operand 1126 states and 1588 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:38:40,341 INFO L93 Difference]: Finished difference Result 3309 states and 4808 transitions. [2022-12-13 13:38:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 13:38:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-12-13 13:38:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:38:40,347 INFO L225 Difference]: With dead ends: 3309 [2022-12-13 13:38:40,348 INFO L226 Difference]: Without dead ends: 2278 [2022-12-13 13:38:40,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 13:38:40,350 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 7491 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7678 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:38:40,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7678 Valid, 1628 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 13:38:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2022-12-13 13:38:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2022-12-13 13:38:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2088 states have (on average 1.3620689655172413) internal successors, (2844), 2088 states have internal predecessors, (2844), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-12-13 13:38:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3220 transitions. [2022-12-13 13:38:40,432 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3220 transitions. Word has length 113 [2022-12-13 13:38:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:38:40,432 INFO L495 AbstractCegarLoop]: Abstraction has 2278 states and 3220 transitions. [2022-12-13 13:38:40,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3220 transitions. [2022-12-13 13:38:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-13 13:38:40,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:38:40,435 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:38:40,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:38:40,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:40,636 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:38:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:38:40,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1143828796, now seen corresponding path program 2 times [2022-12-13 13:38:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:38:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960556901] [2022-12-13 13:38:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:38:40,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:38:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:38:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:44,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:38:44,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960556901] [2022-12-13 13:38:44,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960556901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:38:44,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256002680] [2022-12-13 13:38:44,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:38:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:38:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:38:44,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:38:44,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:38:44,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:38:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:38:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 13:38:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:38:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:44,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:38:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:38:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256002680] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:38:52,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:38:52,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-12-13 13:38:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255975325] [2022-12-13 13:38:52,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:38:52,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-13 13:38:52,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:38:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-13 13:38:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-12-13 13:38:52,601 INFO L87 Difference]: Start difference. First operand 2278 states and 3220 transitions. Second operand has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:39:59,783 INFO L93 Difference]: Finished difference Result 6669 states and 9704 transitions. [2022-12-13 13:39:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-13 13:39:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-12-13 13:39:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:39:59,792 INFO L225 Difference]: With dead ends: 6669 [2022-12-13 13:39:59,792 INFO L226 Difference]: Without dead ends: 4582 [2022-12-13 13:39:59,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-12-13 13:39:59,797 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 16141 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 4234 mSolverCounterSat, 2348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16520 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 6582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2348 IncrementalHoareTripleChecker+Valid, 4234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:39:59,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16520 Valid, 3254 Invalid, 6582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2348 Valid, 4234 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-13 13:39:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2022-12-13 13:39:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4582. [2022-12-13 13:39:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4200 states have (on average 1.3628571428571428) internal successors, (5724), 4200 states have internal predecessors, (5724), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-12-13 13:39:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 6484 transitions. [2022-12-13 13:39:59,960 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 6484 transitions. Word has length 209 [2022-12-13 13:39:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:39:59,961 INFO L495 AbstractCegarLoop]: Abstraction has 4582 states and 6484 transitions. [2022-12-13 13:39:59,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:39:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 6484 transitions. [2022-12-13 13:39:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-12-13 13:39:59,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:39:59,967 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:39:59,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:40:00,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:40:00,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:40:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:40:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1342680580, now seen corresponding path program 3 times [2022-12-13 13:40:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:40:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941092241] [2022-12-13 13:40:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:40:00,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:40:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:40:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 13:40:17,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:40:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941092241] [2022-12-13 13:40:17,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941092241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:40:17,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782123735] [2022-12-13 13:40:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:40:17,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:40:17,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:40:17,240 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:40:17,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:40:17,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:40:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:40:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:40:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:40:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-12-13 13:40:17,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:40:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-12-13 13:40:17,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782123735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:40:17,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:40:17,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 6, 6] total 201 [2022-12-13 13:40:17,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118937195] [2022-12-13 13:40:17,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:40:17,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-12-13 13:40:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:40:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-12-13 13:40:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18942, Invalid=21258, Unknown=0, NotChecked=0, Total=40200 [2022-12-13 13:40:17,854 INFO L87 Difference]: Start difference. First operand 4582 states and 6484 transitions. Second operand has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:43:30,601 INFO L93 Difference]: Finished difference Result 11193 states and 16590 transitions. [2022-12-13 13:43:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 777 states. [2022-12-13 13:43:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2022-12-13 13:43:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:43:30,616 INFO L225 Difference]: With dead ends: 11193 [2022-12-13 13:43:30,616 INFO L226 Difference]: Without dead ends: 6994 [2022-12-13 13:43:30,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171373 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=192074, Invalid=420232, Unknown=0, NotChecked=0, Total=612306 [2022-12-13 13:43:30,662 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 24208 mSDsluCounter, 3617 mSDsCounter, 0 mSdLazyCounter, 4982 mSolverCounterSat, 2298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24591 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 7280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2298 IncrementalHoareTripleChecker+Valid, 4982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:43:30,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24591 Valid, 4040 Invalid, 7280 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2298 Valid, 4982 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-13 13:43:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2022-12-13 13:43:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 6963. [2022-12-13 13:43:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6577 states have (on average 1.3233997263189905) internal successors, (8704), 6577 states have internal predecessors, (8704), 384 states have call successors, (384), 1 states have call predecessors, (384), 1 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2022-12-13 13:43:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 9472 transitions. [2022-12-13 13:43:30,811 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 9472 transitions. Word has length 401 [2022-12-13 13:43:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:43:30,812 INFO L495 AbstractCegarLoop]: Abstraction has 6963 states and 9472 transitions. [2022-12-13 13:43:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 9472 transitions. [2022-12-13 13:43:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-12-13 13:43:30,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:43:30,817 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:30,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:43:31,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:31,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:43:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:31,018 INFO L85 PathProgramCache]: Analyzing trace with hash 367408256, now seen corresponding path program 4 times [2022-12-13 13:43:31,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:43:31,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934818693] [2022-12-13 13:43:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:31,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:43:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36915 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 13:43:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:43:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934818693] [2022-12-13 13:43:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934818693] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:43:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418900484] [2022-12-13 13:43:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:43:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:43:47,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:43:47,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:43:47,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28dbabd3-4a80-4e08-a48f-cfc0ce8819b5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:43:47,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:43:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:43:47,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 194 conjunts are in the unsatisfiable core [2022-12-13 13:43:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36915 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 13:43:48,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:44:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36915 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 13:44:16,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418900484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:44:16,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:44:16,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195, 195] total 389 [2022-12-13 13:44:16,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134645985] [2022-12-13 13:44:16,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:44:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 389 states [2022-12-13 13:44:16,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:44:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 389 interpolants. [2022-12-13 13:44:16,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75466, Invalid=75466, Unknown=0, NotChecked=0, Total=150932 [2022-12-13 13:44:16,866 INFO L87 Difference]: Start difference. First operand 6963 states and 9472 transitions. Second operand has 389 states, 389 states have (on average 2.030848329048843) internal successors, (790), 389 states have internal predecessors, (790), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)