./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76955366716759eb9478710f6ef46e3de93d252b9c3177ff4beaca56ee5c75a7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:32:28,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:32:28,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:32:28,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:32:28,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:32:28,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:32:28,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:32:28,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:32:28,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:32:28,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:32:28,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:32:28,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:32:28,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:32:28,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:32:28,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:32:28,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:32:28,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:32:28,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:32:28,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:32:28,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:32:28,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:32:28,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:32:28,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:32:28,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:32:28,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:32:28,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:32:28,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:32:28,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:32:28,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:32:28,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:32:28,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:32:28,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:32:28,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:32:28,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:32:28,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:32:28,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:32:28,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:32:28,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:32:28,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:32:28,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:32:28,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:32:28,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:32:28,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:32:28,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:32:28,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:32:28,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:32:28,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:32:28,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:32:28,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:32:28,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:32:28,663 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:32:28,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:32:28,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:32:28,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:32:28,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:32:28,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:32:28,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:32:28,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:32:28,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:32:28,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:32:28,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:32:28,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:32:28,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:32:28,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:32:28,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:32:28,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:32:28,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:32:28,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:32:28,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:32:28,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:32:28,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:32:28,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:32:28,668 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:32:28,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:32:28,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:32:28,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76955366716759eb9478710f6ef46e3de93d252b9c3177ff4beaca56ee5c75a7 [2022-10-17 10:32:28,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:32:28,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:32:28,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:32:28,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:32:28,953 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:32:28,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2022-10-17 10:32:29,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/data/2cdd4737b/59a51dbc7b6d4d09b7e6bfcb4bfd016d/FLAGfd017debc [2022-10-17 10:32:29,587 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:32:29,588 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c [2022-10-17 10:32:29,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/data/2cdd4737b/59a51dbc7b6d4d09b7e6bfcb4bfd016d/FLAGfd017debc [2022-10-17 10:32:29,941 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/data/2cdd4737b/59a51dbc7b6d4d09b7e6bfcb4bfd016d [2022-10-17 10:32:29,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:32:29,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:32:29,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:32:29,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:32:29,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:32:29,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:32:29" (1/1) ... [2022-10-17 10:32:29,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bf8db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:29, skipping insertion in model container [2022-10-17 10:32:29,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:32:29" (1/1) ... [2022-10-17 10:32:29,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:32:29,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:32:30,218 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c[454,467] [2022-10-17 10:32:30,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:32:30,230 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:32:30,244 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/sv-benchmarks/c/recursive-simple/id_i25_o25-2.c[454,467] [2022-10-17 10:32:30,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:32:30,258 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:32:30,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30 WrapperNode [2022-10-17 10:32:30,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:32:30,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:32:30,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:32:30,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:32:30,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,292 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-10-17 10:32:30,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:32:30,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:32:30,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:32:30,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:32:30,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,310 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:32:30,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:32:30,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:32:30,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:32:30,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (1/1) ... [2022-10-17 10:32:30,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:32:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:30,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:32:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:32:30,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:32:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:32:30,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:32:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:32:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-10-17 10:32:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-10-17 10:32:30,468 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:32:30,471 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:32:30,612 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:32:30,628 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:32:30,629 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:32:30,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:32:30 BoogieIcfgContainer [2022-10-17 10:32:30,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:32:30,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:32:30,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:32:30,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:32:30,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:32:29" (1/3) ... [2022-10-17 10:32:30,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f837cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:32:30, skipping insertion in model container [2022-10-17 10:32:30,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:32:30" (2/3) ... [2022-10-17 10:32:30,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f837cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:32:30, skipping insertion in model container [2022-10-17 10:32:30,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:32:30" (3/3) ... [2022-10-17 10:32:30,643 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2022-10-17 10:32:30,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:32:30,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:32:30,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:32:30,748 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;@325d5f23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:32:30,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:32:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:32:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:32:30,779 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:30,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:30,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-10-17 10:32:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034044312] [2022-10-17 10:32:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:30,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:32:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034044312] [2022-10-17 10:32:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034044312] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:32:31,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:32:31,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:32:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974171997] [2022-10-17 10:32:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:32:31,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:32:31,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:32:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:32:31,223 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:32:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:31,298 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-10-17 10:32:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:32:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-10-17 10:32:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:31,309 INFO L225 Difference]: With dead ends: 28 [2022-10-17 10:32:31,311 INFO L226 Difference]: Without dead ends: 15 [2022-10-17 10:32:31,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:32:31,319 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:31,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:32:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-10-17 10:32:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-10-17 10:32:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:32:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-10-17 10:32:31,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-10-17 10:32:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:31,371 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-10-17 10:32:31,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:32:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-10-17 10:32:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:32:31,374 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:31,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:31,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:32:31,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-10-17 10:32:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:31,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488964566] [2022-10-17 10:32:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:31,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:32:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488964566] [2022-10-17 10:32:31,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488964566] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167438696] [2022-10-17 10:32:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:31,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:31,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:31,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:32:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:32:31,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:32:32,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:32:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:32:32,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167438696] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:32:32,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:32:32,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-10-17 10:32:32,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062302390] [2022-10-17 10:32:32,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:32:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:32:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:32:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:32:32,340 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:32:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:32,420 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-10-17 10:32:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:32:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-10-17 10:32:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:32,422 INFO L225 Difference]: With dead ends: 22 [2022-10-17 10:32:32,423 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 10:32:32,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:32:32,428 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:32,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:32:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 10:32:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 10:32:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:32:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-10-17 10:32:32,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-10-17 10:32:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:32,448 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-10-17 10:32:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:32:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-10-17 10:32:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:32:32,451 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:32,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:32,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:32,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:32,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-10-17 10:32:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:32,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625223892] [2022-10-17 10:32:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:32,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:32:33,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625223892] [2022-10-17 10:32:33,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625223892] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228503253] [2022-10-17 10:32:33,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:32:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:33,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:33,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:32:33,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:32:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:32:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:32:33,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:32:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:32:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:32:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228503253] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:32:33,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:32:33,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2022-10-17 10:32:33,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092163664] [2022-10-17 10:32:33,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:32:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:32:33,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:32:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:32:33,641 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-17 10:32:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:33,714 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-10-17 10:32:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:32:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-10-17 10:32:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:33,717 INFO L225 Difference]: With dead ends: 25 [2022-10-17 10:32:33,717 INFO L226 Difference]: Without dead ends: 21 [2022-10-17 10:32:33,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:32:33,722 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:33,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:32:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-10-17 10:32:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-10-17 10:32:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:32:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-10-17 10:32:33,736 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-10-17 10:32:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:33,737 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-10-17 10:32:33,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-17 10:32:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-10-17 10:32:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:32:33,740 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:33,740 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:33,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:33,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:33,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-10-17 10:32:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:33,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266635209] [2022-10-17 10:32:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:33,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:34,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:34,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:34,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:34,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:32:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:34,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266635209] [2022-10-17 10:32:34,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266635209] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:34,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200588764] [2022-10-17 10:32:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:32:34,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:34,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:34,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:34,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:32:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 10:32:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:32:34,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:32:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:32:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:32:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:32:34,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200588764] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:32:34,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:32:34,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-10-17 10:32:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004284240] [2022-10-17 10:32:34,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:32:34,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 10:32:34,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 10:32:34,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:32:34,974 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 10:32:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:35,317 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-10-17 10:32:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:32:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28 [2022-10-17 10:32:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:35,322 INFO L225 Difference]: With dead ends: 39 [2022-10-17 10:32:35,322 INFO L226 Difference]: Without dead ends: 33 [2022-10-17 10:32:35,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-10-17 10:32:35,327 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:35,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:32:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-17 10:32:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-17 10:32:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:32:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-10-17 10:32:35,347 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-10-17 10:32:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:35,348 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-10-17 10:32:35,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 10:32:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-10-17 10:32:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-17 10:32:35,354 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:35,354 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:35,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:35,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:35,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2022-10-17 10:32:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:35,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818235280] [2022-10-17 10:32:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:35,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:35,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:36,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:36,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:36,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:36,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 10:32:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:36,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818235280] [2022-10-17 10:32:36,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818235280] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:36,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582673221] [2022-10-17 10:32:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:32:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:36,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:32:36,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:32:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:32:36,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:32:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-10-17 10:32:36,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:32:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 10:32:38,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582673221] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:32:38,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:32:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2022-10-17 10:32:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515414431] [2022-10-17 10:32:38,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:32:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:32:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:32:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:32:38,923 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-10-17 10:32:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:39,055 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-10-17 10:32:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:32:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-10-17 10:32:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:39,058 INFO L225 Difference]: With dead ends: 40 [2022-10-17 10:32:39,058 INFO L226 Difference]: Without dead ends: 36 [2022-10-17 10:32:39,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2022-10-17 10:32:39,060 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:39,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 91 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:32:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-10-17 10:32:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-10-17 10:32:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 10:32:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-10-17 10:32:39,067 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-10-17 10:32:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:39,068 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-10-17 10:32:39,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-10-17 10:32:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-10-17 10:32:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:32:39,070 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:39,070 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:39,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:39,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2022-10-17 10:32:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005140001] [2022-10-17 10:32:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-10-17 10:32:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:39,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005140001] [2022-10-17 10:32:39,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005140001] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:39,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891277483] [2022-10-17 10:32:39,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:32:39,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:39,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:39,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:32:40,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-10-17 10:32:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:32:40,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-17 10:32:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 10:32:40,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:32:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 10:32:43,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891277483] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:32:43,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:32:43,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 21] total 52 [2022-10-17 10:32:43,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111643839] [2022-10-17 10:32:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:32:43,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-10-17 10:32:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:32:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-10-17 10:32:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2238, Unknown=0, NotChecked=0, Total=2652 [2022-10-17 10:32:43,535 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 52 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (27), 27 states have call predecessors, (27), 3 states have call successors, (27) [2022-10-17 10:32:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:32:44,366 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-10-17 10:32:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-10-17 10:32:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (27), 27 states have call predecessors, (27), 3 states have call successors, (27) Word has length 58 [2022-10-17 10:32:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:32:44,369 INFO L225 Difference]: With dead ends: 69 [2022-10-17 10:32:44,369 INFO L226 Difference]: Without dead ends: 63 [2022-10-17 10:32:44,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1189, Invalid=6293, Unknown=0, NotChecked=0, Total=7482 [2022-10-17 10:32:44,377 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:32:44,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 121 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:32:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-17 10:32:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-10-17 10:32:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-10-17 10:32:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-10-17 10:32:44,402 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-10-17 10:32:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:32:44,402 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-10-17 10:32:44,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 1 states have call predecessors, (4), 27 states have return successors, (27), 27 states have call predecessors, (27), 3 states have call successors, (27) [2022-10-17 10:32:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-10-17 10:32:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-10-17 10:32:44,411 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:32:44,411 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:32:44,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:32:44,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:44,627 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:32:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:32:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 6 times [2022-10-17 10:32:44,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:32:44,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125915269] [2022-10-17 10:32:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:32:44,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:32:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:44,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:45,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:45,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:45,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:46,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:47,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:32:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:32:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-10-17 10:32:47,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:32:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125915269] [2022-10-17 10:32:47,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125915269] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:32:47,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768013067] [2022-10-17 10:32:47,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:32:47,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:32:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:32:47,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:32:47,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14b1bd03-c3ea-49ac-a06b-ea62e1aaba09/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:32:47,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-10-17 10:32:47,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:32:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 10:32:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:32:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-10-17 10:32:48,239 INFO L328 TraceCheckSpWp]: Computing backward predicates...