./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/packet_filter.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/packet_filter.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:34:16,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:34:16,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:34:16,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:34:16,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:34:16,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:34:16,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:34:16,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:34:16,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:34:16,949 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:34:16,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:34:16,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:34:16,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:34:16,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:34:16,954 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:34:16,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:34:16,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:34:16,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:34:16,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:34:16,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:34:16,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:34:16,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:34:16,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:34:16,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:34:16,968 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:34:16,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:34:16,968 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:34:16,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:34:16,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:34:16,970 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:34:16,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:34:16,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:16,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:34:16,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:34:16,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:34:16,972 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:34:16,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:34:16,972 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:34:16,972 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:34:16,973 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:34:16,973 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:34:16,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:34:16,973 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f [2023-11-23 22:34:17,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:34:17,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:34:17,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:34:17,297 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:34:17,297 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:34:17,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/heap-data/packet_filter.i [2023-11-23 22:34:20,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:34:21,162 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:34:21,163 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/sv-benchmarks/c/heap-data/packet_filter.i [2023-11-23 22:34:21,191 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/data/be619f8bb/0713768d733d49f5835d2445a36716b9/FLAGa8826df50 [2023-11-23 22:34:21,209 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/data/be619f8bb/0713768d733d49f5835d2445a36716b9 [2023-11-23 22:34:21,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:34:21,214 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:34:21,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:21,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:34:21,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:34:21,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:21,232 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f3cb2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21, skipping insertion in model container [2023-11-23 22:34:21,233 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:21,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:34:21,780 WARN L240 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_77f78630-757a-4c7c-8788-815c70830f56/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2023-11-23 22:34:21,799 WARN L240 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_77f78630-757a-4c7c-8788-815c70830f56/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2023-11-23 22:34:21,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:21,832 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:34:21,905 WARN L240 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_77f78630-757a-4c7c-8788-815c70830f56/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2023-11-23 22:34:21,909 WARN L240 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_77f78630-757a-4c7c-8788-815c70830f56/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2023-11-23 22:34:21,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:21,974 WARN L675 CHandler]: The function __VERIFIER_nondet_charp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:34:21,984 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:34:21,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21 WrapperNode [2023-11-23 22:34:21,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:21,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:21,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:34:21,990 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:34:22,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,137 INFO L138 Inliner]: procedures = 130, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 161 [2023-11-23 22:34:22,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:22,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:34:22,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:34:22,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:34:22,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,165 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,199 INFO L189 HeapSplitter]: Split 57 memory accesses to 7 slices as follows [2, 16, 15, 6, 6, 6, 6] [2023-11-23 22:34:22,200 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,240 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:34:22,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:34:22,253 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:34:22,253 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:34:22,254 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (1/1) ... [2023-11-23 22:34:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:22,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:34:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:34:22,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:34:22,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:34:22,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:34:22,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:34:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:34:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 22:34:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-23 22:34:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:34:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:34:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:34:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:34:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:34:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 22:34:22,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-23 22:34:22,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:34:22,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:34:22,396 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2023-11-23 22:34:22,396 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2023-11-23 22:34:22,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 22:34:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 22:34:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 22:34:22,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 22:34:22,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 22:34:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 22:34:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-23 22:34:22,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:34:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 22:34:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 22:34:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 22:34:22,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 22:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 22:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 22:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-23 22:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2023-11-23 22:34:22,401 INFO L130 BoogieDeclarations]: Found specification of procedure send [2023-11-23 22:34:22,401 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2023-11-23 22:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 22:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 22:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 22:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 22:34:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-23 22:34:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-23 22:34:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2023-11-23 22:34:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:34:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:34:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:34:22,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:34:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:34:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 22:34:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 22:34:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:34:22,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:34:22,651 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:34:22,654 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:34:23,074 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:34:23,153 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:34:23,153 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:34:23,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:23 BoogieIcfgContainer [2023-11-23 22:34:23,154 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:34:23,157 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:34:23,157 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:34:23,165 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:34:23,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:34:21" (1/3) ... [2023-11-23 22:34:23,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493963f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:23, skipping insertion in model container [2023-11-23 22:34:23,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:21" (2/3) ... [2023-11-23 22:34:23,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493963f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:23, skipping insertion in model container [2023-11-23 22:34:23,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:23" (3/3) ... [2023-11-23 22:34:23,168 INFO L112 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2023-11-23 22:34:23,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:34:23,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 22:34:23,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:34:23,260 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=LoopHeads, 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;@a35b734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:34:23,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 22:34:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 29 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 22:34:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 22:34:23,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:23,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:23,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:23,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash -949461624, now seen corresponding path program 1 times [2023-11-23 22:34:23,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:23,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698835935] [2023-11-23 22:34:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:23,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:23,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698835935] [2023-11-23 22:34:23,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698835935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:23,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:23,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076254714] [2023-11-23 22:34:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:23,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:34:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:34:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:34:23,518 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 29 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:23,616 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2023-11-23 22:34:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:34:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 22:34:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:23,629 INFO L225 Difference]: With dead ends: 59 [2023-11-23 22:34:23,629 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 22:34:23,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:34:23,640 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:23,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:34:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 22:34:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-23 22:34:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 27 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 22:34:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-11-23 22:34:23,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 7 [2023-11-23 22:34:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:23,687 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-11-23 22:34:23,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-11-23 22:34:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 22:34:23,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:23,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:34:23,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:23,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 484994221, now seen corresponding path program 1 times [2023-11-23 22:34:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519579563] [2023-11-23 22:34:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:24,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519579563] [2023-11-23 22:34:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519579563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:24,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:24,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570999100] [2023-11-23 22:34:24,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:34:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:24,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:34:24,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:34:24,152 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:24,471 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-11-23 22:34:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:34:24,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 22:34:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:24,475 INFO L225 Difference]: With dead ends: 73 [2023-11-23 22:34:24,476 INFO L226 Difference]: Without dead ends: 54 [2023-11-23 22:34:24,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:24,484 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:24,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:34:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-23 22:34:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2023-11-23 22:34:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.34375) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 22:34:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2023-11-23 22:34:24,513 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 8 [2023-11-23 22:34:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:24,514 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2023-11-23 22:34:24,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2023-11-23 22:34:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 22:34:24,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:24,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:24,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:34:24,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:24,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2056469504, now seen corresponding path program 1 times [2023-11-23 22:34:24,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:24,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261248703] [2023-11-23 22:34:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:24,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261248703] [2023-11-23 22:34:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261248703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:24,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:24,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126104471] [2023-11-23 22:34:24,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:34:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:34:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:34:24,853 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:25,198 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-11-23 22:34:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:34:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 22:34:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:25,205 INFO L225 Difference]: With dead ends: 58 [2023-11-23 22:34:25,206 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 22:34:25,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:34:25,212 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:25,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:34:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 22:34:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2023-11-23 22:34:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 22:34:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-11-23 22:34:25,231 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 10 [2023-11-23 22:34:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:25,231 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-11-23 22:34:25,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-11-23 22:34:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 22:34:25,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:25,234 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:25,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:34:25,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:25,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -632406958, now seen corresponding path program 1 times [2023-11-23 22:34:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:25,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185705729] [2023-11-23 22:34:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 22:34:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:34:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185705729] [2023-11-23 22:34:25,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185705729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:25,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:25,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:34:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846775736] [2023-11-23 22:34:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:34:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:25,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:34:25,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:34:25,624 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-23 22:34:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:25,870 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-11-23 22:34:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:34:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 17 [2023-11-23 22:34:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:25,872 INFO L225 Difference]: With dead ends: 42 [2023-11-23 22:34:25,872 INFO L226 Difference]: Without dead ends: 40 [2023-11-23 22:34:25,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:34:25,874 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:25,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:34:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-23 22:34:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-23 22:34:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 32 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 22:34:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-11-23 22:34:25,890 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 17 [2023-11-23 22:34:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:25,890 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-11-23 22:34:25,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2023-11-23 22:34:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-11-23 22:34:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 22:34:25,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:25,892 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:25,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:34:25,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:25,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash -632405036, now seen corresponding path program 1 times [2023-11-23 22:34:25,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:25,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196606497] [2023-11-23 22:34:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:25,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:28,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 22:34:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:28,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:28,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196606497] [2023-11-23 22:34:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196606497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:28,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:28,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:34:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856819402] [2023-11-23 22:34:28,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:28,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:34:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:34:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:34:28,575 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 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) [2023-11-23 22:34:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:30,219 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2023-11-23 22:34:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:34:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 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 17 [2023-11-23 22:34:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:30,223 INFO L225 Difference]: With dead ends: 86 [2023-11-23 22:34:30,225 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 22:34:30,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:34:30,227 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:30,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 171 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 22:34:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 22:34:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2023-11-23 22:34:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 39 states have internal predecessors, (51), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 22:34:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-11-23 22:34:30,249 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 17 [2023-11-23 22:34:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:30,249 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-11-23 22:34:30,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 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) [2023-11-23 22:34:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-11-23 22:34:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 22:34:30,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:30,252 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:30,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:34:30,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:30,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 231415546, now seen corresponding path program 1 times [2023-11-23 22:34:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:30,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642618557] [2023-11-23 22:34:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:34:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:31,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:31,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642618557] [2023-11-23 22:34:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642618557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112726086] [2023-11-23 22:34:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:31,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:31,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:31,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:31,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:34:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:31,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 22:34:31,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:31,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 22:34:33,797 WARN L854 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (or (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (exists ((|v_#memory_$Pointer$#3.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_#memory_$Pointer$#3.base|))) (and (= (store |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| .cse0 (select |c_#memory_$Pointer$#3.base| .cse0)) |c_#memory_$Pointer$#3.base|) (= (select (select |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (not (= .cse0 |c_ULTIMATE.start_main_~#prio_queue~0#1.base|))))))) is different from false [2023-11-23 22:34:35,800 WARN L876 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (or (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (exists ((|v_#memory_$Pointer$#3.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_#memory_$Pointer$#3.base|))) (and (= (store |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| .cse0 (select |c_#memory_$Pointer$#3.base| .cse0)) |c_#memory_$Pointer$#3.base|) (= (select (select |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (not (= .cse0 |c_ULTIMATE.start_main_~#prio_queue~0#1.base|))))))) is different from true [2023-11-23 22:34:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:35,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112726086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:35,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:35,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2023-11-23 22:34:35,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347165987] [2023-11-23 22:34:35,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:35,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:34:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:34:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=48, Unknown=6, NotChecked=14, Total=90 [2023-11-23 22:34:35,989 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:34:36,420 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) (and (not (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)) .cse0 (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (or .cse0 (exists ((|v_#memory_$Pointer$#3.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse1 (@diff |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_#memory_$Pointer$#3.base|))) (and (= (store |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| .cse1 (select |c_#memory_$Pointer$#3.base| .cse1)) |c_#memory_$Pointer$#3.base|) (= (select (select |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (not (= .cse1 |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)))))))) is different from false [2023-11-23 22:34:36,423 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) (and (not (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)) .cse0 (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (or .cse0 (exists ((|v_#memory_$Pointer$#3.base_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse1 (@diff |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_#memory_$Pointer$#3.base|))) (and (= (store |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| .cse1 (select |c_#memory_$Pointer$#3.base| .cse1)) |c_#memory_$Pointer$#3.base|) (= (select (select |v_#memory_$Pointer$#3.base_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (not (= .cse1 |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)))))))) is different from true [2023-11-23 22:34:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:36,543 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2023-11-23 22:34:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:34:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-23 22:34:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:36,545 INFO L225 Difference]: With dead ends: 93 [2023-11-23 22:34:36,545 INFO L226 Difference]: Without dead ends: 73 [2023-11-23 22:34:36,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=28, Invalid=61, Unknown=9, NotChecked=34, Total=132 [2023-11-23 22:34:36,547 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:36,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 227 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2023-11-23 22:34:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-23 22:34:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2023-11-23 22:34:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 48 states have internal predecessors, (64), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:34:36,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2023-11-23 22:34:36,560 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 18 [2023-11-23 22:34:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:36,561 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2023-11-23 22:34:36,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 22:34:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2023-11-23 22:34:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 22:34:36,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:36,563 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:36,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 22:34:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:36,779 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:36,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 179772406, now seen corresponding path program 1 times [2023-11-23 22:34:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065635341] [2023-11-23 22:34:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:34:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:38,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:38,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065635341] [2023-11-23 22:34:38,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065635341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:38,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:38,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:34:38,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257443685] [2023-11-23 22:34:38,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:34:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:34:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:34:38,065 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) [2023-11-23 22:34:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:39,193 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2023-11-23 22:34:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:34:39,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 18 [2023-11-23 22:34:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:39,195 INFO L225 Difference]: With dead ends: 83 [2023-11-23 22:34:39,195 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 22:34:39,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:34:39,196 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:39,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 292 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 22:34:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 22:34:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2023-11-23 22:34:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 55 states have internal predecessors, (75), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:34:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2023-11-23 22:34:39,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 18 [2023-11-23 22:34:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2023-11-23 22:34:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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) [2023-11-23 22:34:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2023-11-23 22:34:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 22:34:39,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:39,224 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:39,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:34:39,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:39,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2137178523, now seen corresponding path program 1 times [2023-11-23 22:34:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:39,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631376624] [2023-11-23 22:34:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 22:34:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:39,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:39,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631376624] [2023-11-23 22:34:39,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631376624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:39,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:39,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:34:39,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149688403] [2023-11-23 22:34:39,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:39,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:34:39,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:34:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:39,691 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:34:40,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:40,439 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2023-11-23 22:34:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:40,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 19 [2023-11-23 22:34:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:40,441 INFO L225 Difference]: With dead ends: 85 [2023-11-23 22:34:40,441 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 22:34:40,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:34:40,444 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:40,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 169 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:34:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 22:34:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2023-11-23 22:34:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 55 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:34:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2023-11-23 22:34:40,474 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 19 [2023-11-23 22:34:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:40,474 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2023-11-23 22:34:40,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:34:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2023-11-23 22:34:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 22:34:40,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:40,480 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:40,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:34:40,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:40,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:40,482 INFO L85 PathProgramCache]: Analyzing trace with hash -934287349, now seen corresponding path program 1 times [2023-11-23 22:34:40,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:40,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359475601] [2023-11-23 22:34:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:40,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:41,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:34:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:41,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359475601] [2023-11-23 22:34:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359475601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:41,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:41,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 22:34:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257273097] [2023-11-23 22:34:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:34:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:34:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:34:41,596 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 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) [2023-11-23 22:34:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:42,453 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2023-11-23 22:34:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:34:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 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 20 [2023-11-23 22:34:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:42,455 INFO L225 Difference]: With dead ends: 88 [2023-11-23 22:34:42,455 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 22:34:42,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:34:42,457 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 30 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:42,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 358 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:34:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 22:34:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2023-11-23 22:34:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 60 states have internal predecessors, (80), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:34:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2023-11-23 22:34:42,474 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 20 [2023-11-23 22:34:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:42,474 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2023-11-23 22:34:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 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) [2023-11-23 22:34:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2023-11-23 22:34:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 22:34:42,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:42,476 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:42,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:34:42,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:42,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash -934285427, now seen corresponding path program 1 times [2023-11-23 22:34:42,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:42,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688641635] [2023-11-23 22:34:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:34:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:44,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:44,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688641635] [2023-11-23 22:34:44,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688641635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:44,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:44,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-23 22:34:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032064209] [2023-11-23 22:34:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:44,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:34:44,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:34:44,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:34:44,044 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-11-23 22:34:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:46,006 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2023-11-23 22:34:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:34:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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 20 [2023-11-23 22:34:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:46,008 INFO L225 Difference]: With dead ends: 98 [2023-11-23 22:34:46,008 INFO L226 Difference]: Without dead ends: 88 [2023-11-23 22:34:46,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:34:46,010 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:46,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 322 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 22:34:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-23 22:34:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2023-11-23 22:34:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 60 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 22:34:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2023-11-23 22:34:46,026 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 20 [2023-11-23 22:34:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:46,027 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2023-11-23 22:34:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-11-23 22:34:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2023-11-23 22:34:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:34:46,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:46,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:46,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:34:46,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:46,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2092316765, now seen corresponding path program 1 times [2023-11-23 22:34:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:46,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640503924] [2023-11-23 22:34:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:47,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 22:34:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:47,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 22:34:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640503924] [2023-11-23 22:34:47,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640503924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:47,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943494388] [2023-11-23 22:34:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:47,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:47,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:47,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:47,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:34:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:47,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-23 22:34:47,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:47,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-23 22:34:47,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-11-23 22:34:47,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:34:47,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-23 22:34:48,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-11-23 22:34:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:48,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:48,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943494388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:48,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:34:48,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-23 22:34:48,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918030313] [2023-11-23 22:34:48,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:48,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:34:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:34:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:34:48,704 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 22:34:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:50,290 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2023-11-23 22:34:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:34:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-11-23 22:34:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:50,293 INFO L225 Difference]: With dead ends: 127 [2023-11-23 22:34:50,293 INFO L226 Difference]: Without dead ends: 107 [2023-11-23 22:34:50,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:34:50,296 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:50,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 307 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 22:34:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-23 22:34:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2023-11-23 22:34:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 80 states have internal predecessors, (104), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 22:34:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2023-11-23 22:34:50,326 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 25 [2023-11-23 22:34:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:50,327 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2023-11-23 22:34:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 22:34:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2023-11-23 22:34:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:34:50,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:50,329 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:50,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:50,547 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:50,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:50,547 INFO L85 PathProgramCache]: Analyzing trace with hash -186555297, now seen corresponding path program 1 times [2023-11-23 22:34:50,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435888470] [2023-11-23 22:34:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:50,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:52,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 22:34:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:53,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-23 22:34:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:53,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435888470] [2023-11-23 22:34:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435888470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779299910] [2023-11-23 22:34:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:53,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:53,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:53,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:34:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:53,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-23 22:34:53,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:53,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 22:34:53,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-11-23 22:34:53,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 69 [2023-11-23 22:34:53,923 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:34:53,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 40 [2023-11-23 22:34:54,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-23 22:34:54,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:34:54,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-11-23 22:34:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:34:54,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-11-23 22:34:54,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 15 [2023-11-23 22:34:54,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:34:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:34:54,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-23 22:34:54,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:34:54,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:34:54,319 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-23 22:34:54,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2023-11-23 22:34:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:34:54,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-23 22:34:54,567 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2023-11-23 22:34:54,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 42 [2023-11-23 22:34:54,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-23 22:34:54,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 22:34:54,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 22:34:54,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:34:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:54,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:54,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779299910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:54,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:54,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2023-11-23 22:34:54,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28226634] [2023-11-23 22:34:54,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:54,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 22:34:54,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:34:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:34:54,942 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 21 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 22:34:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:57,776 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2023-11-23 22:34:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-23 22:34:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-11-23 22:34:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:57,781 INFO L225 Difference]: With dead ends: 193 [2023-11-23 22:34:57,781 INFO L226 Difference]: Without dead ends: 173 [2023-11-23 22:34:57,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2023-11-23 22:34:57,783 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 162 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:57,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 289 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 22:34:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-23 22:34:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 102. [2023-11-23 22:34:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 89 states have internal predecessors, (118), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-23 22:34:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2023-11-23 22:34:57,818 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 27 [2023-11-23 22:34:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:57,820 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2023-11-23 22:34:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 22:34:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2023-11-23 22:34:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:34:57,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:57,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:57,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:58,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:58,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash -658044300, now seen corresponding path program 1 times [2023-11-23 22:34:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:58,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378378101] [2023-11-23 22:34:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-23 22:34:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:58,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-23 22:34:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:58,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:58,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378378101] [2023-11-23 22:34:58,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378378101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:58,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106479028] [2023-11-23 22:34:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:58,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:58,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:58,801 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:58,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:34:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:59,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-23 22:34:59,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:59,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 22:34:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:59,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:59,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106479028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:59,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:59,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2023-11-23 22:34:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223058467] [2023-11-23 22:34:59,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:59,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:59,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=62, Unknown=4, NotChecked=0, Total=90 [2023-11-23 22:34:59,588 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:35:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:00,044 INFO L93 Difference]: Finished difference Result 147 states and 200 transitions. [2023-11-23 22:35:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:35:00,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-23 22:35:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:00,047 INFO L225 Difference]: With dead ends: 147 [2023-11-23 22:35:00,047 INFO L226 Difference]: Without dead ends: 124 [2023-11-23 22:35:00,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=76, Unknown=4, NotChecked=0, Total=110 [2023-11-23 22:35:00,048 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:00,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 181 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:35:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-23 22:35:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2023-11-23 22:35:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 104 states have (on average 1.3653846153846154) internal successors, (142), 105 states have internal predecessors, (142), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 22:35:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2023-11-23 22:35:00,080 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 27 [2023-11-23 22:35:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:00,081 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2023-11-23 22:35:00,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 22:35:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2023-11-23 22:35:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 22:35:00,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:00,083 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:00,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:35:00,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:00,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1136982011, now seen corresponding path program 2 times [2023-11-23 22:35:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508581202] [2023-11-23 22:35:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:00,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-23 22:35:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:01,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 22:35:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:35:01,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508581202] [2023-11-23 22:35:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508581202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:01,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055214538] [2023-11-23 22:35:01,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:35:01,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:01,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:01,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:35:01,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:35:01,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:01,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 22:35:01,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:01,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 22:35:03,754 WARN L854 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (exists ((|v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_#memory_$Pointer$#3.offset|))) (and (= .cse0 |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) (= (select (select |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_#memory_$Pointer$#3.offset| (store |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| .cse0 (select |c_#memory_$Pointer$#3.offset| .cse0))))))) (not (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)) (or (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (exists ((|v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse1 (@diff |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_#memory_$Pointer$#3.base|))) (and (= (select (select |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| .cse1) (= (store |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| .cse1 (select |c_#memory_$Pointer$#3.base| .cse1)) |c_#memory_$Pointer$#3.base|)))))) is different from false [2023-11-23 22:35:03,759 WARN L876 $PredicateComparison]: unable to prove that (and (or (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (exists ((|v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_#memory_$Pointer$#3.offset|))) (and (= .cse0 |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) (= (select (select |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_#memory_$Pointer$#3.offset| (store |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| .cse0 (select |c_#memory_$Pointer$#3.offset| .cse0))))))) (not (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)) (or (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (exists ((|v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse1 (@diff |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_#memory_$Pointer$#3.base|))) (and (= (select (select |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| .cse1) (= (store |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| .cse1 (select |c_#memory_$Pointer$#3.base| .cse1)) |c_#memory_$Pointer$#3.base|)))))) is different from true [2023-11-23 22:35:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 1 not checked. [2023-11-23 22:35:03,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:03,986 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2239 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#normal_queue~0#1.base| v_ArrVal_2239) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (forall ((v_ArrVal_2238 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#normal_queue~0#1.base| v_ArrVal_2238) |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) is different from false [2023-11-23 22:35:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055214538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:03,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:35:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2023-11-23 22:35:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325080802] [2023-11-23 22:35:03,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:35:03,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:35:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=40, Unknown=3, NotChecked=26, Total=90 [2023-11-23 22:35:03,990 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:35:04,419 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (.cse2 (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) (and (or .cse0 (exists ((|v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse1 (@diff |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_#memory_$Pointer$#3.offset|))) (and (= .cse1 |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) (= (select (select |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_#memory_$Pointer$#3.offset| (store |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| .cse1 (select |c_#memory_$Pointer$#3.offset| .cse1))))))) (not (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)) .cse2 .cse0 (or .cse2 (exists ((|v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_#memory_$Pointer$#3.base|))) (and (= (select (select |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| .cse3) (= (store |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| .cse3 (select |c_#memory_$Pointer$#3.base| .cse3)) |c_#memory_$Pointer$#3.base|))))))) is different from false [2023-11-23 22:35:04,423 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_$Pointer$#3.offset| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0)) (.cse2 (= (select (select |c_#memory_$Pointer$#3.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0))) (and (or .cse0 (exists ((|v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse1 (@diff |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_#memory_$Pointer$#3.offset|))) (and (= .cse1 |c_ULTIMATE.start_main_~#normal_queue~0#1.base|) (= (select (select |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_#memory_$Pointer$#3.offset| (store |v_old(#memory_$Pointer$#3.offset)_AFTER_CALL_8| .cse1 (select |c_#memory_$Pointer$#3.offset| .cse1))))))) (not (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|)) .cse2 .cse0 (or .cse2 (exists ((|v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_#memory_$Pointer$#3.base|))) (and (= (select (select |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| |c_ULTIMATE.start_main_~#prio_queue~0#1.base|) |c_ULTIMATE.start_main_~#prio_queue~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#normal_queue~0#1.base| .cse3) (= (store |v_old(#memory_$Pointer$#3.base)_AFTER_CALL_8| .cse3 (select |c_#memory_$Pointer$#3.base| .cse3)) |c_#memory_$Pointer$#3.base|))))))) is different from true [2023-11-23 22:35:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:35:04,569 INFO L93 Difference]: Finished difference Result 164 states and 224 transitions. [2023-11-23 22:35:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:35:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-23 22:35:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:35:04,573 INFO L225 Difference]: With dead ends: 164 [2023-11-23 22:35:04,573 INFO L226 Difference]: Without dead ends: 144 [2023-11-23 22:35:04,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=51, Unknown=5, NotChecked=48, Total=132 [2023-11-23 22:35:04,574 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 31 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:35:04,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 165 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2023-11-23 22:35:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-23 22:35:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2023-11-23 22:35:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 107 states have internal predecessors, (146), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 22:35:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2023-11-23 22:35:04,603 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 28 [2023-11-23 22:35:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:35:04,604 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2023-11-23 22:35:04,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 22:35:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2023-11-23 22:35:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 22:35:04,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:35:04,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:04,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77f78630-757a-4c7c-8788-815c70830f56/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:35:04,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:04,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1888175332, now seen corresponding path program 1 times [2023-11-23 22:35:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658226432] [2023-11-23 22:35:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat