./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/ex3_forlist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/ex3_forlist.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl --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 ddbd4e73adf4663f87721f5aa250c32f7b058621a618ab1d03544a940de1ce0e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:31:34,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:31:34,906 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:31:34,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:31:34,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:31:34,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:31:34,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:31:34,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:31:34,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:31:34,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:31:34,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:31:34,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:31:34,984 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:31:34,986 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:31:34,987 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:31:34,987 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:31:34,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:31:34,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:31:34,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:31:34,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:31:34,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:31:34,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:31:34,990 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:31:34,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:31:34,991 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:31:34,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:31:34,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:31:34,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:31:34,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:34,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:31:34,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:31:34,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:31:34,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:31:34,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:31:34,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:31:34,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:31:34,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:31:34,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:31:34,997 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:31:34,997 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_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddbd4e73adf4663f87721f5aa250c32f7b058621a618ab1d03544a940de1ce0e [2023-11-12 02:31:35,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:31:35,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:31:35,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:31:35,397 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:31:35,398 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:31:35,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/ldv-regression/ex3_forlist.i [2023-11-12 02:31:38,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:31:38,710 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:31:38,711 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/sv-benchmarks/c/ldv-regression/ex3_forlist.i [2023-11-12 02:31:38,718 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/data/f2b0435e3/c1ec4b0950ac40fe82e57f0c10a4c93c/FLAG901228c65 [2023-11-12 02:31:38,732 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/data/f2b0435e3/c1ec4b0950ac40fe82e57f0c10a4c93c [2023-11-12 02:31:38,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:31:38,736 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:31:38,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:38,738 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:31:38,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:31:38,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:38" (1/1) ... [2023-11-12 02:31:38,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1c714e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:38, skipping insertion in model container [2023-11-12 02:31:38,746 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:38" (1/1) ... [2023-11-12 02:31:38,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:31:38,906 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_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/sv-benchmarks/c/ldv-regression/ex3_forlist.i[293,306] [2023-11-12 02:31:38,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:38,956 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:31:38,968 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_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/sv-benchmarks/c/ldv-regression/ex3_forlist.i[293,306] [2023-11-12 02:31:38,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:39,004 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:31:39,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39 WrapperNode [2023-11-12 02:31:39,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:39,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:39,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:31:39,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:31:39,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,046 INFO L138 Inliner]: procedures = 19, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-11-12 02:31:39,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:39,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:31:39,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:31:39,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:31:39,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,058 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:31:39,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:31:39,087 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:31:39,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:31:39,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (1/1) ... [2023-11-12 02:31:39,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:39,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:31:39,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:31:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:31:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:31:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:31:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-12 02:31:39,172 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-12 02:31:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-11-12 02:31:39,173 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-11-12 02:31:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:31:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure fake_malloc [2023-11-12 02:31:39,173 INFO L138 BoogieDeclarations]: Found implementation of procedure fake_malloc [2023-11-12 02:31:39,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:31:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:31:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:31:39,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:31:39,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:31:39,301 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:31:39,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:31:39,515 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:31:39,522 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:31:39,522 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:31:39,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:39 BoogieIcfgContainer [2023-11-12 02:31:39,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:31:39,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:31:39,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:31:39,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:31:39,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:31:38" (1/3) ... [2023-11-12 02:31:39,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b312de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:39, skipping insertion in model container [2023-11-12 02:31:39,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:39" (2/3) ... [2023-11-12 02:31:39,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b312de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:39, skipping insertion in model container [2023-11-12 02:31:39,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:39" (3/3) ... [2023-11-12 02:31:39,534 INFO L112 eAbstractionObserver]: Analyzing ICFG ex3_forlist.i [2023-11-12 02:31:39,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:31:39,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:31:39,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:31:39,603 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;@4407c76e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:31:39,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:31:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:31:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:31:39,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:39,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:39,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:39,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:39,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1517633021, now seen corresponding path program 1 times [2023-11-12 02:31:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112893] [2023-11-12 02:31:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:39,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:31:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:39,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:39,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:31:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:31:39,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:39,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112893] [2023-11-12 02:31:39,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:39,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:31:39,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:31:39,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460922321] [2023-11-12 02:31:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:39,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:31:39,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:39,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:31:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:31:39,993 INFO L87 Difference]: Start difference. First operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:31:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:40,157 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2023-11-12 02:31:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:31:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-12 02:31:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:40,169 INFO L225 Difference]: With dead ends: 82 [2023-11-12 02:31:40,170 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 02:31:40,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:31:40,177 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:40,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:31:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 02:31:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2023-11-12 02:31:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:31:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-12 02:31:40,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2023-11-12 02:31:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:40,224 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-12 02:31:40,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:31:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-12 02:31:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:31:40,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:40,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:31:40,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:40,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1707935715, now seen corresponding path program 1 times [2023-11-12 02:31:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640528091] [2023-11-12 02:31:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:31:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:31:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:31:40,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640528091] [2023-11-12 02:31:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640528091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:40,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:31:40,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:31:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65496987] [2023-11-12 02:31:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:31:40,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:31:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:31:40,429 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:31:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:40,583 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2023-11-12 02:31:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:31:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-12 02:31:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:40,585 INFO L225 Difference]: With dead ends: 75 [2023-11-12 02:31:40,585 INFO L226 Difference]: Without dead ends: 46 [2023-11-12 02:31:40,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:31:40,588 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:40,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:31:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-12 02:31:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-11-12 02:31:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:31:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-11-12 02:31:40,599 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2023-11-12 02:31:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-11-12 02:31:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:31:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-11-12 02:31:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 02:31:40,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:40,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1] [2023-11-12 02:31:40,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:31:40,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:40,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1895345243, now seen corresponding path program 1 times [2023-11-12 02:31:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:40,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321981232] [2023-11-12 02:31:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:31:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-12 02:31:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:31:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-12 02:31:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:31:40,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321981232] [2023-11-12 02:31:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321981232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116519921] [2023-11-12 02:31:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:40,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:40,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:31:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:40,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:31:40,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:31:41,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:31:41,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116519921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:41,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:31:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-11-12 02:31:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996397091] [2023-11-12 02:31:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:41,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:31:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:31:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:31:41,041 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:31:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:41,071 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2023-11-12 02:31:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:31:41,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-11-12 02:31:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:41,074 INFO L225 Difference]: With dead ends: 58 [2023-11-12 02:31:41,075 INFO L226 Difference]: Without dead ends: 39 [2023-11-12 02:31:41,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:31:41,080 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:41,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:31:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-12 02:31:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-11-12 02:31:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:31:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-12 02:31:41,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2023-11-12 02:31:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:41,098 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-12 02:31:41,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:31:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-12 02:31:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:31:41,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:41,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2023-11-12 02:31:41,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:31:41,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:41,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:41,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1248982919, now seen corresponding path program 1 times [2023-11-12 02:31:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:41,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122858986] [2023-11-12 02:31:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:31:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-12 02:31:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-12 02:31:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:31:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122858986] [2023-11-12 02:31:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122858986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518592017] [2023-11-12 02:31:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:41,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:41,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:41,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:31:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:31:41,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:41,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:41,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518592017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:41,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:41,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2023-11-12 02:31:41,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167643480] [2023-11-12 02:31:41,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:41,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:31:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:31:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:31:41,715 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-12 02:31:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:41,895 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2023-11-12 02:31:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:31:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 35 [2023-11-12 02:31:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:41,897 INFO L225 Difference]: With dead ends: 78 [2023-11-12 02:31:41,897 INFO L226 Difference]: Without dead ends: 48 [2023-11-12 02:31:41,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:31:41,901 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:41,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 42 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:31:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-12 02:31:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-11-12 02:31:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:31:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-11-12 02:31:41,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 35 [2023-11-12 02:31:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:41,924 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-11-12 02:31:41,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-12 02:31:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-11-12 02:31:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 02:31:41,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:41,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:41,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:42,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1916572233, now seen corresponding path program 2 times [2023-11-12 02:31:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641692719] [2023-11-12 02:31:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:42,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:31:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:42,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:31:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:31:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:43,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:31:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:31:43,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:43,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641692719] [2023-11-12 02:31:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641692719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:43,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659221791] [2023-11-12 02:31:43,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:31:43,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:43,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:43,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:43,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:31:43,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:31:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:31:43,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:31:43,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:43,779 INFO L351 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 [2023-11-12 02:31:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:43,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:31:43,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659221791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:43,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:31:43,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2023-11-12 02:31:43,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304763728] [2023-11-12 02:31:43,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:43,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:31:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:31:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:31:43,898 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:31:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:44,130 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2023-11-12 02:31:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:31:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-11-12 02:31:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:44,133 INFO L225 Difference]: With dead ends: 79 [2023-11-12 02:31:44,133 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 02:31:44,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:31:44,135 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 61 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:44,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 131 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:31:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 02:31:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2023-11-12 02:31:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 46 states have internal predecessors, (57), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-12 02:31:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2023-11-12 02:31:44,150 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 37 [2023-11-12 02:31:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:44,151 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2023-11-12 02:31:44,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:31:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2023-11-12 02:31:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:31:44,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:44,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-11-12 02:31:44,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:44,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:44,360 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:44,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1102539601, now seen corresponding path program 1 times [2023-11-12 02:31:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:44,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953526645] [2023-11-12 02:31:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:44,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:31:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:44,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:31:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:31:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:45,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:31:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:45,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:45,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953526645] [2023-11-12 02:31:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953526645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:45,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406368096] [2023-11-12 02:31:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:45,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:45,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:45,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:45,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:31:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:45,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 02:31:45,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:45,855 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-12 02:31:45,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:31:45,863 INFO L351 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 [2023-11-12 02:31:45,981 INFO L351 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 7 treesize of output 3 [2023-11-12 02:31:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:31:46,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:46,470 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:31:46,470 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-11-12 02:31:46,476 INFO L351 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 33 treesize of output 25 [2023-11-12 02:31:46,488 INFO L351 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 6 treesize of output 4 [2023-11-12 02:31:46,605 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:31:46,608 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-11-12 02:31:46,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:31:46,621 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:31:46,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-12 02:31:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:31:46,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406368096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:46,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2023-11-12 02:31:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532011334] [2023-11-12 02:31:46,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:46,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-12 02:31:46,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-12 02:31:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:31:46,961 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 41 states, 37 states have (on average 1.864864864864865) internal successors, (69), 29 states have internal predecessors, (69), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-12 02:31:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:48,691 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2023-11-12 02:31:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:31:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.864864864864865) internal successors, (69), 29 states have internal predecessors, (69), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 40 [2023-11-12 02:31:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:48,694 INFO L225 Difference]: With dead ends: 131 [2023-11-12 02:31:48,694 INFO L226 Difference]: Without dead ends: 105 [2023-11-12 02:31:48,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=404, Invalid=2902, Unknown=0, NotChecked=0, Total=3306 [2023-11-12 02:31:48,697 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 332 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:48,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 136 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:31:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-12 02:31:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2023-11-12 02:31:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 73 states have internal predecessors, (90), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-12 02:31:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2023-11-12 02:31:48,728 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 40 [2023-11-12 02:31:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:48,729 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2023-11-12 02:31:48,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.864864864864865) internal successors, (69), 29 states have internal predecessors, (69), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-12 02:31:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2023-11-12 02:31:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:31:48,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:48,734 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1] [2023-11-12 02:31:48,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:48,940 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:48,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2084265885, now seen corresponding path program 1 times [2023-11-12 02:31:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:48,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949418019] [2023-11-12 02:31:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:49,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:31:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:49,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:31:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:49,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:31:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:49,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:31:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:31:49,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:49,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949418019] [2023-11-12 02:31:49,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949418019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:49,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135501018] [2023-11-12 02:31:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:49,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:49,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:49,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:31:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:49,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:31:49,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:49,951 INFO L351 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 [2023-11-12 02:31:50,040 INFO L351 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 7 treesize of output 3 [2023-11-12 02:31:50,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:31:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:31:50,322 INFO L351 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 24 treesize of output 21 [2023-11-12 02:31:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:31:50,329 INFO L351 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 16 treesize of output 20 [2023-11-12 02:31:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:31:50,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135501018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:50,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:31:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-11-12 02:31:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359672936] [2023-11-12 02:31:50,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:31:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:31:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=490, Unknown=2, NotChecked=0, Total=600 [2023-11-12 02:31:50,739 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 02:31:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:53,713 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2023-11-12 02:31:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 02:31:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 40 [2023-11-12 02:31:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:53,716 INFO L225 Difference]: With dead ends: 146 [2023-11-12 02:31:53,716 INFO L226 Difference]: Without dead ends: 130 [2023-11-12 02:31:53,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=473, Invalid=1582, Unknown=15, NotChecked=0, Total=2070 [2023-11-12 02:31:53,718 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 202 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 49 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:53,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 103 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 550 Invalid, 27 Unknown, 0 Unchecked, 2.2s Time] [2023-11-12 02:31:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-12 02:31:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2023-11-12 02:31:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 73 states have internal predecessors, (90), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-12 02:31:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2023-11-12 02:31:53,752 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 40 [2023-11-12 02:31:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:53,753 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2023-11-12 02:31:53,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 02:31:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2023-11-12 02:31:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:31:53,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:53,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:53,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:53,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:53,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash -658709463, now seen corresponding path program 1 times [2023-11-12 02:31:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:53,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628484420] [2023-11-12 02:31:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:54,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:31:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:54,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:31:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:54,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:31:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:54,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:31:54,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628484420] [2023-11-12 02:31:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628484420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006029534] [2023-11-12 02:31:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:54,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:54,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:54,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:54,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:31:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:54,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:31:54,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:31:54,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:31:54,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006029534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:54,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:54,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2023-11-12 02:31:54,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832216972] [2023-11-12 02:31:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:31:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:31:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:31:54,234 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:31:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:54,420 INFO L93 Difference]: Finished difference Result 169 states and 216 transitions. [2023-11-12 02:31:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:31:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-12 02:31:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:54,424 INFO L225 Difference]: With dead ends: 169 [2023-11-12 02:31:54,424 INFO L226 Difference]: Without dead ends: 105 [2023-11-12 02:31:54,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:31:54,428 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:54,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:31:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-12 02:31:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2023-11-12 02:31:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 77 states have internal predecessors, (94), 12 states have call successors, (12), 8 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-12 02:31:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2023-11-12 02:31:54,459 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 41 [2023-11-12 02:31:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:54,460 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2023-11-12 02:31:54,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:31:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2023-11-12 02:31:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:31:54,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:54,461 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-12 02:31:54,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:54,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:54,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:54,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash 387918117, now seen corresponding path program 1 times [2023-11-12 02:31:54,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:54,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742301339] [2023-11-12 02:31:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:54,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:31:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:55,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:31:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:55,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:31:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:55,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:31:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:55,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742301339] [2023-11-12 02:31:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742301339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991296452] [2023-11-12 02:31:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:55,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:55,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:55,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:55,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:31:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:56,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:31:56,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:56,225 INFO L351 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 [2023-11-12 02:31:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:56,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:56,512 INFO L351 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 16 treesize of output 14 [2023-11-12 02:31:56,515 INFO L351 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 16 treesize of output 12 [2023-11-12 02:31:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:31:56,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991296452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:56,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:56,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 35 [2023-11-12 02:31:56,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441184028] [2023-11-12 02:31:56,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:56,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 02:31:56,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 02:31:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 02:31:56,580 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 35 states, 31 states have (on average 2.806451612903226) internal successors, (87), 28 states have internal predecessors, (87), 9 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-12 02:32:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:00,892 INFO L93 Difference]: Finished difference Result 277 states and 362 transitions. [2023-11-12 02:32:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-12 02:32:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.806451612903226) internal successors, (87), 28 states have internal predecessors, (87), 9 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 43 [2023-11-12 02:32:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:00,901 INFO L225 Difference]: With dead ends: 277 [2023-11-12 02:32:00,901 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 02:32:00,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=939, Invalid=6543, Unknown=0, NotChecked=0, Total=7482 [2023-11-12 02:32:00,908 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 389 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:00,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 153 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 02:32:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 02:32:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 176. [2023-11-12 02:32:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 145 states have internal predecessors, (181), 18 states have call successors, (18), 13 states have call predecessors, (18), 19 states have return successors, (28), 17 states have call predecessors, (28), 13 states have call successors, (28) [2023-11-12 02:32:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 227 transitions. [2023-11-12 02:32:00,950 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 227 transitions. Word has length 43 [2023-11-12 02:32:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:00,952 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 227 transitions. [2023-11-12 02:32:00,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.806451612903226) internal successors, (87), 28 states have internal predecessors, (87), 9 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-12 02:32:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 227 transitions. [2023-11-12 02:32:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:32:00,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:00,955 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:00,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:32:01,165 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:01,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash -479191559, now seen corresponding path program 2 times [2023-11-12 02:32:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:01,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597679249] [2023-11-12 02:32:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:01,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:01,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:01,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:01,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-12 02:32:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:32:02,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:02,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597679249] [2023-11-12 02:32:02,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597679249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773495382] [2023-11-12 02:32:02,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:32:02,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:02,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:02,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:32:02,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:32:02,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:02,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:32:02,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:02,288 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-12 02:32:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,304 INFO L351 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 [2023-11-12 02:32:02,318 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-12 02:32:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,326 INFO L351 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 [2023-11-12 02:32:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,457 INFO L351 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 02:32:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,467 INFO L351 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 02:32:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,475 INFO L351 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 25 treesize of output 18 [2023-11-12 02:32:02,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,481 INFO L351 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 [2023-11-12 02:32:02,821 INFO L351 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 7 treesize of output 3 [2023-11-12 02:32:02,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:02,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-11-12 02:32:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:32:03,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:03,826 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:03,826 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2023-11-12 02:32:03,830 INFO L351 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 5 treesize of output 3 [2023-11-12 02:32:03,835 INFO L351 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 54 treesize of output 50 [2023-11-12 02:32:03,845 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:03,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2023-11-12 02:32:03,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:32:03,883 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:32:03,883 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2023-11-12 02:32:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:32:03,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773495382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:03,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:03,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 11] total 37 [2023-11-12 02:32:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673413882] [2023-11-12 02:32:03,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:03,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 02:32:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 02:32:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1196, Unknown=8, NotChecked=0, Total=1332 [2023-11-12 02:32:03,962 INFO L87 Difference]: Start difference. First operand 176 states and 227 transitions. Second operand has 37 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 7 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-12 02:32:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:06,168 INFO L93 Difference]: Finished difference Result 233 states and 294 transitions. [2023-11-12 02:32:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:32:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 7 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 43 [2023-11-12 02:32:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:06,172 INFO L225 Difference]: With dead ends: 233 [2023-11-12 02:32:06,172 INFO L226 Difference]: Without dead ends: 130 [2023-11-12 02:32:06,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=434, Invalid=2864, Unknown=8, NotChecked=0, Total=3306 [2023-11-12 02:32:06,175 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:06,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 81 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:32:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-12 02:32:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2023-11-12 02:32:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-12 02:32:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2023-11-12 02:32:06,206 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 43 [2023-11-12 02:32:06,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:06,206 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2023-11-12 02:32:06,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 7 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-12 02:32:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2023-11-12 02:32:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:32:06,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:06,208 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-12 02:32:06,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:32:06,414 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:06,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1610816303, now seen corresponding path program 1 times [2023-11-12 02:32:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:06,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87219732] [2023-11-12 02:32:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:06,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:32:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:32:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:07,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87219732] [2023-11-12 02:32:07,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87219732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:07,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371698088] [2023-11-12 02:32:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:07,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:07,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:07,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:32:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-12 02:32:07,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:07,686 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-12 02:32:07,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:07,690 INFO L351 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 [2023-11-12 02:32:08,063 INFO L351 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 7 treesize of output 3 [2023-11-12 02:32:08,256 INFO L351 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-11-12 02:32:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:08,264 INFO L351 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 [2023-11-12 02:32:08,288 INFO L351 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 7 treesize of output 3 [2023-11-12 02:32:08,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:08,572 INFO L351 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 [2023-11-12 02:32:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:32:08,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:08,768 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| |c_~#pstate~0.base| v_ArrVal_901) |c_~#pp~0.base|) (+ |c_~#pp~0.offset| 4 (* |c_g_~i~2#1| 4))) |c_g_~pointer#1.offset|))) is different from false [2023-11-12 02:32:08,785 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (not (= |c_g_#in~pointer#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_~#pstate~0.base| v_ArrVal_901) |c_~#pp~0.base|) (+ |c_~#pp~0.offset| 4))))) is different from false [2023-11-12 02:32:08,792 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| |c_~#pstate~0.base| v_ArrVal_901) |c_~#pp~0.base|) (+ |c_~#pp~0.offset| 4)) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-11-12 02:32:08,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371698088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:08,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:32:08,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2023-11-12 02:32:08,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943074033] [2023-11-12 02:32:08,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:08,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-12 02:32:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-12 02:32:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=12, NotChecked=234, Total=1806 [2023-11-12 02:32:08,810 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 31 states have internal predecessors, (69), 5 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-12 02:32:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:10,931 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2023-11-12 02:32:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:32:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 31 states have internal predecessors, (69), 5 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2023-11-12 02:32:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:10,940 INFO L225 Difference]: With dead ends: 153 [2023-11-12 02:32:10,940 INFO L226 Difference]: Without dead ends: 137 [2023-11-12 02:32:10,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=12, NotChecked=372, Total=4290 [2023-11-12 02:32:10,943 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 213 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 51 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:10,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 103 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1578 Invalid, 14 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:32:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-12 02:32:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2023-11-12 02:32:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 87 states have internal predecessors, (105), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-12 02:32:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2023-11-12 02:32:10,965 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 47 [2023-11-12 02:32:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:10,966 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2023-11-12 02:32:10,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 31 states have internal predecessors, (69), 5 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-12 02:32:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2023-11-12 02:32:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:32:10,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:10,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-11-12 02:32:10,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:11,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:32:11,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:11,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1018026466, now seen corresponding path program 1 times [2023-11-12 02:32:11,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:11,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314884016] [2023-11-12 02:32:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:11,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:32:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:32:11,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314884016] [2023-11-12 02:32:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314884016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50531033] [2023-11-12 02:32:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:11,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:11,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:11,293 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:11,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:32:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:32:11,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:32:11,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:32:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50531033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:11,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:32:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-11-12 02:32:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560882704] [2023-11-12 02:32:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:32:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:32:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:32:11,525 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:32:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:11,562 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2023-11-12 02:32:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:32:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-11-12 02:32:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:11,563 INFO L225 Difference]: With dead ends: 149 [2023-11-12 02:32:11,564 INFO L226 Difference]: Without dead ends: 102 [2023-11-12 02:32:11,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:32:11,565 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:11,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 73 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:32:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-12 02:32:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2023-11-12 02:32:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 79 states have internal predecessors, (88), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-12 02:32:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2023-11-12 02:32:11,585 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 48 [2023-11-12 02:32:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:11,585 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2023-11-12 02:32:11,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:32:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2023-11-12 02:32:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:32:11,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:11,586 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 02:32:11,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:11,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:11,795 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:11,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -384289610, now seen corresponding path program 1 times [2023-11-12 02:32:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:11,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003425144] [2023-11-12 02:32:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:32:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 02:32:11,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003425144] [2023-11-12 02:32:11,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003425144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:11,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:11,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:32:11,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022302944] [2023-11-12 02:32:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:11,913 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:32:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:12,118 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-11-12 02:32:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:32:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-11-12 02:32:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:12,120 INFO L225 Difference]: With dead ends: 137 [2023-11-12 02:32:12,120 INFO L226 Difference]: Without dead ends: 90 [2023-11-12 02:32:12,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:32:12,121 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:12,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 81 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-12 02:32:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-11-12 02:32:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 68 states have internal predecessors, (72), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-12 02:32:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2023-11-12 02:32:12,138 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 48 [2023-11-12 02:32:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:12,139 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2023-11-12 02:32:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:32:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2023-11-12 02:32:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 02:32:12,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:12,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2023-11-12 02:32:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:32:12,141 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2101637850, now seen corresponding path program 1 times [2023-11-12 02:32:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350427117] [2023-11-12 02:32:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:12,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:32:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:32:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:32:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350427117] [2023-11-12 02:32:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350427117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773442391] [2023-11-12 02:32:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:13,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:13,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:13,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:32:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:13,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-12 02:32:13,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:14,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:14,381 INFO L351 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 [2023-11-12 02:32:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:32:14,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:14,780 INFO L351 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 33 treesize of output 25 [2023-11-12 02:32:14,790 INFO L351 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 6 treesize of output 4 [2023-11-12 02:32:15,021 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:15,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2023-11-12 02:32:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:32:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773442391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:15,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:15,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 55 [2023-11-12 02:32:15,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807046086] [2023-11-12 02:32:15,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:15,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-12 02:32:15,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:15,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-12 02:32:15,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2758, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 02:32:15,435 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 55 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 38 states have internal predecessors, (103), 13 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-12 02:32:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:17,450 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2023-11-12 02:32:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:32:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 38 states have internal predecessors, (103), 13 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 53 [2023-11-12 02:32:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:17,451 INFO L225 Difference]: With dead ends: 92 [2023-11-12 02:32:17,451 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 02:32:17,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=544, Invalid=5156, Unknown=0, NotChecked=0, Total=5700 [2023-11-12 02:32:17,454 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:17,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 146 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:32:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 02:32:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-12 02:32:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-12 02:32:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-11-12 02:32:17,471 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 53 [2023-11-12 02:32:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:17,472 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-11-12 02:32:17,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 38 states have internal predecessors, (103), 13 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-12 02:32:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-11-12 02:32:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 02:32:17,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:17,473 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-12 02:32:17,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:17,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:32:17,684 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:17,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1289824473, now seen corresponding path program 2 times [2023-11-12 02:32:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:17,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492454659] [2023-11-12 02:32:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:17,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:18,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:32:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:32:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:32:19,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492454659] [2023-11-12 02:32:19,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492454659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485151279] [2023-11-12 02:32:19,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:32:19,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:19,468 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:19,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:32:19,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:32:19,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:32:19,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-12 02:32:19,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:20,436 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-12 02:32:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:20,440 INFO L351 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 [2023-11-12 02:32:20,593 INFO L351 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 7 treesize of output 3 [2023-11-12 02:32:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:32:21,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:21,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485151279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:21,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:32:21,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 47 [2023-11-12 02:32:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999839780] [2023-11-12 02:32:21,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-12 02:32:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-12 02:32:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2108, Unknown=9, NotChecked=0, Total=2256 [2023-11-12 02:32:21,240 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 47 states, 43 states have (on average 2.046511627906977) internal successors, (88), 36 states have internal predecessors, (88), 10 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-12 02:32:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:23,603 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2023-11-12 02:32:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-12 02:32:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.046511627906977) internal successors, (88), 36 states have internal predecessors, (88), 10 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 58 [2023-11-12 02:32:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:23,605 INFO L225 Difference]: With dead ends: 86 [2023-11-12 02:32:23,605 INFO L226 Difference]: Without dead ends: 59 [2023-11-12 02:32:23,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=410, Invalid=4982, Unknown=10, NotChecked=0, Total=5402 [2023-11-12 02:32:23,608 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:23,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 138 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:32:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-12 02:32:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-12 02:32:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:32:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2023-11-12 02:32:23,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 58 [2023-11-12 02:32:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:23,628 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2023-11-12 02:32:23,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.046511627906977) internal successors, (88), 36 states have internal predecessors, (88), 10 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-12 02:32:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2023-11-12 02:32:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 02:32:23,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:23,630 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2023-11-12 02:32:23,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:32:23,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:32:23,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1190348709, now seen corresponding path program 1 times [2023-11-12 02:32:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:23,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94279372] [2023-11-12 02:32:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-12 02:32:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:32:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:24,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:32:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:24,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:32:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:25,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:32:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:32:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94279372] [2023-11-12 02:32:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94279372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063118360] [2023-11-12 02:32:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:25,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6dd9bc5-0494-4c4e-a311-d8e8d9fc7090/bin/uautomizer-verify-uTZkv6EMXl/z3