./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max60-2.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_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/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_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/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_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/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 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d --- 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 13:47:40,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:47:40,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:47:40,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:47:40,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:47:40,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:47:40,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:47:40,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:47:40,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:47:40,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:47:40,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:47:40,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:47:40,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:47:40,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:47:40,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:47:40,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:47:40,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:47:40,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:47:40,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:47:40,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:47:40,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:47:40,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:47:40,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:47:40,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:47:40,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:47:40,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:47:40,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:47:40,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:47:40,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:47:40,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:47:40,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:47:40,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:47:40,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:47:40,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:47:40,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:47:40,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:47:40,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:47:40,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:47:40,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:47:40,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:47:40,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:47:40,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:47:40,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:47:40,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:47:40,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:47:40,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:47:40,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:47:40,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:47:40,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:47:40,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:47:40,105 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:47:40,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:47:40,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:47:40,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:47:40,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:47:40,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:47:40,108 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:47:40,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:47:40,109 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:47:40,109 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_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d [2022-12-13 13:47:40,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:47:40,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:47:40,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:47:40,296 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:47:40,296 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:47:40,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/reducercommutativity/max60-2.i [2022-12-13 13:47:42,851 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:47:43,023 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:47:43,024 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/sv-benchmarks/c/reducercommutativity/max60-2.i [2022-12-13 13:47:43,029 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/data/2bf787b7e/eac069a1ddd94432bf72e22bf2774ddd/FLAG730427c6e [2022-12-13 13:47:43,430 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/data/2bf787b7e/eac069a1ddd94432bf72e22bf2774ddd [2022-12-13 13:47:43,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:47:43,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:47:43,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:47:43,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:47:43,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:47:43,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73519fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43, skipping insertion in model container [2022-12-13 13:47:43,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:47:43,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:47:43,579 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_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2022-12-13 13:47:43,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:47:43,588 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:47:43,603 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_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2022-12-13 13:47:43,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:47:43,615 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:47:43,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43 WrapperNode [2022-12-13 13:47:43,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:47:43,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:47:43,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:47:43,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:47:43,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,637 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-13 13:47:43,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:47:43,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:47:43,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:47:43,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:47:43,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:47:43,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:47:43,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:47:43,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:47:43,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (1/1) ... [2022-12-13 13:47:43,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:47:43,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:43,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:47:43,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:47:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:47:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-12-13 13:47:43,716 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-12-13 13:47:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:47:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:47:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:47:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:47:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:47:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:47:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:47:43,772 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:47:43,773 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:47:43,888 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:47:43,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:47:43,892 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 13:47:43,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:47:43 BoogieIcfgContainer [2022-12-13 13:47:43,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:47:43,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:47:43,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:47:43,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:47:43,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:47:43" (1/3) ... [2022-12-13 13:47:43,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1999fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:47:43, skipping insertion in model container [2022-12-13 13:47:43,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:47:43" (2/3) ... [2022-12-13 13:47:43,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1999fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:47:43, skipping insertion in model container [2022-12-13 13:47:43,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:47:43" (3/3) ... [2022-12-13 13:47:43,899 INFO L112 eAbstractionObserver]: Analyzing ICFG max60-2.i [2022-12-13 13:47:43,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:47:43,912 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:47:43,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:47:43,953 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;@322f1387, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:47:43,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:47:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 13:47:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 13:47:43,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:43,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:43,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2022-12-13 13:47:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:43,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850203228] [2022-12-13 13:47:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:43,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:47:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:47:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 13:47:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:47:44,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:44,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850203228] [2022-12-13 13:47:44,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850203228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:47:44,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:47:44,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:47:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104867399] [2022-12-13 13:47:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:47:44,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:47:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:47:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:47:44,149 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 13:47:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:44,164 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-12-13 13:47:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:47:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 13:47:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:44,171 INFO L225 Difference]: With dead ends: 52 [2022-12-13 13:47:44,171 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 13:47:44,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:47:44,175 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:44,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 13:47:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-13 13:47:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 13:47:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-12-13 13:47:44,205 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-12-13 13:47:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:44,205 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-12-13 13:47:44,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 13:47:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-12-13 13:47:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 13:47:44,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:44,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:44,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:47:44,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2022-12-13 13:47:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:44,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740870336] [2022-12-13 13:47:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:44,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:47:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:47:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 13:47:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 13:47:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740870336] [2022-12-13 13:47:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740870336] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331323669] [2022-12-13 13:47:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:44,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:44,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:44,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:47:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:47:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:47:44,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:47:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331323669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:47:44,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:47:44,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 13:47:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853221529] [2022-12-13 13:47:44,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:47:44,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:47:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:44,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:47:44,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:47:44,461 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 13:47:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:44,473 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-12-13 13:47:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:47:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 13:47:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:44,473 INFO L225 Difference]: With dead ends: 46 [2022-12-13 13:47:44,474 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 13:47:44,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:47:44,475 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:44,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 13:47:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-12-13 13:47:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 13:47:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-12-13 13:47:44,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2022-12-13 13:47:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:44,479 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-12-13 13:47:44,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 13:47:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-12-13 13:47:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 13:47:44,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:44,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:44,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:47:44,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:44,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2022-12-13 13:47:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:44,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341982674] [2022-12-13 13:47:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 13:47:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 13:47:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 13:47:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:47:44,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:44,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341982674] [2022-12-13 13:47:44,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341982674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220136009] [2022-12-13 13:47:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:44,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:44,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:44,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:44,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:47:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:47:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:47:44,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:47:44,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220136009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:47:44,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:47:44,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 13:47:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484397009] [2022-12-13 13:47:44,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:47:44,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:47:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:47:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:47:44,956 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:47:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:44,970 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-12-13 13:47:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:47:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-12-13 13:47:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:44,971 INFO L225 Difference]: With dead ends: 48 [2022-12-13 13:47:44,971 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 13:47:44,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 13:47:44,973 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:44,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 13:47:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-12-13 13:47:44,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 13:47:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-13 13:47:44,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2022-12-13 13:47:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:44,980 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-13 13:47:44,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:47:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-13 13:47:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 13:47:44,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:44,982 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:44,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:47:45,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:45,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2022-12-13 13:47:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:45,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256494673] [2022-12-13 13:47:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:45,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 13:47:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:47:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 13:47:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:47:45,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256494673] [2022-12-13 13:47:45,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256494673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453071315] [2022-12-13 13:47:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:45,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:45,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:45,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:45,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:47:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:47:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 13:47:45,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:47:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453071315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:47:45,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:47:45,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-13 13:47:45,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070322057] [2022-12-13 13:47:45,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:47:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:47:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:47:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:47:45,368 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:47:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:45,378 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-12-13 13:47:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:47:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-12-13 13:47:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:45,379 INFO L225 Difference]: With dead ends: 43 [2022-12-13 13:47:45,379 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 13:47:45,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:47:45,381 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:45,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 13:47:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-13 13:47:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 13:47:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-13 13:47:45,386 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2022-12-13 13:47:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:45,387 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-13 13:47:45,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:47:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-13 13:47:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:47:45,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:45,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:45,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:47:45,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:45,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2022-12-13 13:47:45,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:45,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443620434] [2022-12-13 13:47:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:45,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 13:47:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:47:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 13:47:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 13:47:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443620434] [2022-12-13 13:47:45,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443620434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466740956] [2022-12-13 13:47:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:45,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:47:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:47:45,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 13:47:45,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 13:47:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466740956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:45,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:45,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-13 13:47:45,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982120464] [2022-12-13 13:47:45,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:47:45,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:47:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:47:45,942 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:45,977 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-12-13 13:47:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:47:45,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-12-13 13:47:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:45,979 INFO L225 Difference]: With dead ends: 62 [2022-12-13 13:47:45,979 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 13:47:45,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:47:45,981 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:45,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 70 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 13:47:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-12-13 13:47:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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 13:47:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-13 13:47:45,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2022-12-13 13:47:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:45,988 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-13 13:47:45,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-13 13:47:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 13:47:45,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:45,991 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:45,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:47:46,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:46,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2022-12-13 13:47:46,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:46,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994900065] [2022-12-13 13:47:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:46,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:46,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 13:47:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:46,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 13:47:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:46,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-12-13 13:47:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-13 13:47:46,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:46,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994900065] [2022-12-13 13:47:46,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994900065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:46,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154356258] [2022-12-13 13:47:46,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:47:46,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:46,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:46,340 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:46,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:47:46,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:47:46,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:46,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:47:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-13 13:47:46,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-13 13:47:46,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154356258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:46,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:46,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-13 13:47:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661243200] [2022-12-13 13:47:46,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:46,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:47:46,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:47:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:47:46,522 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 13:47:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:46,568 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-12-13 13:47:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:47:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-12-13 13:47:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:46,569 INFO L225 Difference]: With dead ends: 78 [2022-12-13 13:47:46,569 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 13:47:46,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:47:46,571 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:46,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 93 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 13:47:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-12-13 13:47:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 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 13:47:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-12-13 13:47:46,576 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 62 [2022-12-13 13:47:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:46,576 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-12-13 13:47:46,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 13:47:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-12-13 13:47:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 13:47:46,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:46,577 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:46,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:47:46,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 13:47:46,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1341943393, now seen corresponding path program 3 times [2022-12-13 13:47:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936908549] [2022-12-13 13:47:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 13:47:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 13:47:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 13:47:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-13 13:47:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:47,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936908549] [2022-12-13 13:47:47,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936908549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:47,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289823831] [2022-12-13 13:47:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:47:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:47,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:47,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:47:47,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:47:47,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:47,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:47:47,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-12-13 13:47:47,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-12-13 13:47:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289823831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:47,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:47,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-12-13 13:47:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180720190] [2022-12-13 13:47:47,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 13:47:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:47,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 13:47:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:47:47,292 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:47,353 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2022-12-13 13:47:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:47:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-12-13 13:47:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:47,354 INFO L225 Difference]: With dead ends: 98 [2022-12-13 13:47:47,355 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 13:47:47,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:47:47,356 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:47,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 160 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 13:47:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-12-13 13:47:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 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 13:47:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-12-13 13:47:47,364 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 76 [2022-12-13 13:47:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:47,364 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-12-13 13:47:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-12-13 13:47:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-13 13:47:47,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:47,366 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:47,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:47:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:47,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1821282991, now seen corresponding path program 4 times [2022-12-13 13:47:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:47,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977550659] [2022-12-13 13:47:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 13:47:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-12-13 13:47:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-12-13 13:47:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-12-13 13:47:47,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977550659] [2022-12-13 13:47:47,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977550659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804582207] [2022-12-13 13:47:47,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:47:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:47,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:47,886 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:47,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:47:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:47:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:47,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:47:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-12-13 13:47:48,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-12-13 13:47:48,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804582207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:48,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:48,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-13 13:47:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346109146] [2022-12-13 13:47:48,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 13:47:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 13:47:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 13:47:48,243 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:48,300 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2022-12-13 13:47:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 13:47:48,301 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-12-13 13:47:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:48,302 INFO L225 Difference]: With dead ends: 139 [2022-12-13 13:47:48,302 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 13:47:48,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 13:47:48,303 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:48,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 102 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:47:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 13:47:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-12-13 13:47:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 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 13:47:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-12-13 13:47:48,312 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 126 [2022-12-13 13:47:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:48,312 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-12-13 13:47:48,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-12-13 13:47:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-13 13:47:48,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:48,314 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:48,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 13:47:48,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:48,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 717715625, now seen corresponding path program 5 times [2022-12-13 13:47:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:48,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61295717] [2022-12-13 13:47:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:49,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 13:47:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 13:47:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:49,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-12-13 13:47:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-12-13 13:47:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61295717] [2022-12-13 13:47:49,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61295717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:49,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850922385] [2022-12-13 13:47:49,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:47:49,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:49,163 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:49,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:47:49,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 13:47:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:47:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-12-13 13:47:49,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2022-12-13 13:47:50,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850922385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:50,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-12-13 13:47:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751346126] [2022-12-13 13:47:50,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 13:47:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 13:47:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 13:47:50,116 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 41 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:50,228 INFO L93 Difference]: Finished difference Result 174 states and 213 transitions. [2022-12-13 13:47:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 13:47:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 41 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 152 [2022-12-13 13:47:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:50,229 INFO L225 Difference]: With dead ends: 174 [2022-12-13 13:47:50,229 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 13:47:50,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 13:47:50,230 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:50,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 194 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:47:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 13:47:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-12-13 13:47:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 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 13:47:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2022-12-13 13:47:50,242 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 152 [2022-12-13 13:47:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:50,242 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2022-12-13 13:47:50,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 41 states have internal predecessors, (132), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2022-12-13 13:47:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-12-13 13:47:50,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:50,253 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:50,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:47:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:50,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash -180977309, now seen corresponding path program 6 times [2022-12-13 13:47:50,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:50,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314052382] [2022-12-13 13:47:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:51,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 13:47:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-12-13 13:47:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:51,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-12-13 13:47:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-12-13 13:47:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:51,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314052382] [2022-12-13 13:47:51,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314052382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:51,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17140128] [2022-12-13 13:47:51,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:47:51,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:51,248 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:51,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:47:51,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 13:47:51,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:47:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2022-12-13 13:47:51,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2022-12-13 13:47:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17140128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:51,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:51,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-12-13 13:47:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870591153] [2022-12-13 13:47:51,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:51,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 13:47:51,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:51,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 13:47:51,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:47:51,492 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:51,589 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2022-12-13 13:47:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 13:47:51,589 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 250 [2022-12-13 13:47:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:51,590 INFO L225 Difference]: With dead ends: 216 [2022-12-13 13:47:51,590 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 13:47:51,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:47:51,591 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:51,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:47:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 13:47:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-12-13 13:47:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.126865671641791) internal successors, (151), 134 states have internal predecessors, (151), 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 13:47:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2022-12-13 13:47:51,599 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 250 [2022-12-13 13:47:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:51,599 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2022-12-13 13:47:51,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2022-12-13 13:47:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-12-13 13:47:51,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:51,602 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:51,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 13:47:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 13:47:51,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1030534589, now seen corresponding path program 7 times [2022-12-13 13:47:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:51,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731445574] [2022-12-13 13:47:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:52,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 13:47:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-12-13 13:47:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:52,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-12-13 13:47:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-12-13 13:47:52,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731445574] [2022-12-13 13:47:52,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731445574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98275179] [2022-12-13 13:47:52,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:47:52,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:52,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:52,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:47:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:52,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 13:47:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-12-13 13:47:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-12-13 13:47:53,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98275179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:53,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:53,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-12-13 13:47:53,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580316368] [2022-12-13 13:47:53,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:53,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 13:47:53,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 13:47:53,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 13:47:53,434 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:53,565 INFO L93 Difference]: Finished difference Result 279 states and 342 transitions. [2022-12-13 13:47:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 13:47:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 260 [2022-12-13 13:47:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:53,567 INFO L225 Difference]: With dead ends: 279 [2022-12-13 13:47:53,567 INFO L226 Difference]: Without dead ends: 195 [2022-12-13 13:47:53,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 13:47:53,569 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:53,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:47:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-13 13:47:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-13 13:47:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0894736842105264) internal successors, (207), 190 states have internal predecessors, (207), 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 13:47:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2022-12-13 13:47:53,576 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 260 [2022-12-13 13:47:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:53,576 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2022-12-13 13:47:53,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2022-12-13 13:47:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-13 13:47:53,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:53,579 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:53,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 13:47:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 13:47:53,781 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash -447473291, now seen corresponding path program 8 times [2022-12-13 13:47:53,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:53,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705181129] [2022-12-13 13:47:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:55,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-12-13 13:47:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-12-13 13:47:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-12-13 13:47:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-12-13 13:47:55,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705181129] [2022-12-13 13:47:55,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705181129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75463237] [2022-12-13 13:47:55,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:47:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:55,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:55,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:55,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:47:55,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:47:55,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 13:47:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-12-13 13:47:55,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-12-13 13:47:56,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75463237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:56,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:56,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2022-12-13 13:47:56,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236743295] [2022-12-13 13:47:56,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:56,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 13:47:56,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 13:47:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 13:47:56,920 INFO L87 Difference]: Start difference. First operand 195 states and 213 transitions. Second operand has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:57,042 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2022-12-13 13:47:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 13:47:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 316 [2022-12-13 13:47:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:57,043 INFO L225 Difference]: With dead ends: 291 [2022-12-13 13:47:57,043 INFO L226 Difference]: Without dead ends: 207 [2022-12-13 13:47:57,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 582 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 13:47:57,045 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:57,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 177 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:47:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-13 13:47:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-12-13 13:47:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0841584158415842) internal successors, (219), 202 states have internal predecessors, (219), 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 13:47:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2022-12-13 13:47:57,054 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 316 [2022-12-13 13:47:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:57,054 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2022-12-13 13:47:57,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:47:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2022-12-13 13:47:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-12-13 13:47:57,056 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:57,056 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:57,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 13:47:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 13:47:57,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:57,258 INFO L85 PathProgramCache]: Analyzing trace with hash 588773185, now seen corresponding path program 9 times [2022-12-13 13:47:57,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234700288] [2022-12-13 13:47:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:57,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:57,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-12-13 13:47:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:57,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-12-13 13:47:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:57,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2022-12-13 13:47:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 5211 trivial. 0 not checked. [2022-12-13 13:47:57,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234700288] [2022-12-13 13:47:57,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234700288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390375248] [2022-12-13 13:47:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:47:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:57,799 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 13:47:58,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 13:47:58,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:47:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2022-12-13 13:47:58,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7185 trivial. 0 not checked. [2022-12-13 13:47:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390375248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:58,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:58,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2022-12-13 13:47:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598850439] [2022-12-13 13:47:58,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 13:47:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 13:47:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-12-13 13:47:58,216 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:58,300 INFO L93 Difference]: Finished difference Result 313 states and 361 transitions. [2022-12-13 13:47:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 13:47:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 328 [2022-12-13 13:47:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:58,301 INFO L225 Difference]: With dead ends: 313 [2022-12-13 13:47:58,301 INFO L226 Difference]: Without dead ends: 230 [2022-12-13 13:47:58,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-12-13 13:47:58,302 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:58,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 218 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:47:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-12-13 13:47:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2022-12-13 13:47:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0810810810810811) internal successors, (240), 222 states have internal predecessors, (240), 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 13:47:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 246 transitions. [2022-12-13 13:47:58,312 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 246 transitions. Word has length 328 [2022-12-13 13:47:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:58,313 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 246 transitions. [2022-12-13 13:47:58,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:47:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 246 transitions. [2022-12-13 13:47:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-12-13 13:47:58,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:58,316 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:58,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 13:47:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 13:47:58,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -228888372, now seen corresponding path program 10 times [2022-12-13 13:47:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:58,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912046443] [2022-12-13 13:47:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:47:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:58,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-12-13 13:47:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-12-13 13:47:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-12-13 13:47:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:47:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2022-12-13 13:47:59,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:47:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912046443] [2022-12-13 13:47:59,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912046443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:47:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379566948] [2022-12-13 13:47:59,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:47:59,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:59,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:47:59,069 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:47:59,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 13:47:59,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:47:59,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:47:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:47:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:47:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 5607 trivial. 0 not checked. [2022-12-13 13:47:59,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:47:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2022-12-13 13:47:59,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379566948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:47:59,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:47:59,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2022-12-13 13:47:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788195747] [2022-12-13 13:47:59,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:47:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 13:47:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:47:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 13:47:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:47:59,638 INFO L87 Difference]: Start difference. First operand 227 states and 246 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:47:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:47:59,745 INFO L93 Difference]: Finished difference Result 398 states and 471 transitions. [2022-12-13 13:47:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 13:47:59,745 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 356 [2022-12-13 13:47:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:47:59,747 INFO L225 Difference]: With dead ends: 398 [2022-12-13 13:47:59,747 INFO L226 Difference]: Without dead ends: 295 [2022-12-13 13:47:59,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:47:59,748 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 99 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:47:59,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 198 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:47:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-12-13 13:47:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-12-13 13:47:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.1206896551724137) internal successors, (325), 290 states have internal predecessors, (325), 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 13:47:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 331 transitions. [2022-12-13 13:47:59,754 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 331 transitions. Word has length 356 [2022-12-13 13:47:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:47:59,755 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 331 transitions. [2022-12-13 13:47:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:47:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 331 transitions. [2022-12-13 13:47:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-12-13 13:47:59,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:47:59,758 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:47:59,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 13:47:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:47:59,959 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:47:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:47:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1353851287, now seen corresponding path program 11 times [2022-12-13 13:47:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:47:59,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234170241] [2022-12-13 13:47:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:47:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:48:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:48:00,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-12-13 13:48:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:48:01,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2022-12-13 13:48:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:48:01,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2022-12-13 13:48:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:48:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22339 backedges. 0 proven. 10344 refuted. 0 times theorem prover too weak. 11995 trivial. 0 not checked. [2022-12-13 13:48:01,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:48:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234170241] [2022-12-13 13:48:01,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234170241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:48:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761195717] [2022-12-13 13:48:01,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:48:01,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:48:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:48:01,460 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:48:01,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ff7b67-0933-4da4-9c56-3aa14ce5ac90/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process