./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu --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 da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:45,544 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:45,635 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:45,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:45,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:45,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:45,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:45,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:45,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:45,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:45,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:45,698 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:45,699 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:45,700 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:45,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:45,701 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:45,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:45,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:45,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:45,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:45,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:45,704 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:45,704 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:45,705 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:45,705 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:45,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:45,706 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:45,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:45,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:45,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:45,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:45,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:45,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:45,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:45,711 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:45,711 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:45,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:45,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:45,712 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:45,712 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_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 [2023-11-19 07:41:46,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:46,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:46,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:46,104 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:46,105 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:46,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/reducercommutativity/max20-1.i [2023-11-19 07:41:49,226 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:49,450 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:49,451 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/sv-benchmarks/c/reducercommutativity/max20-1.i [2023-11-19 07:41:49,461 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/data/d157e2bb2/f77de0e73ec84b05a886659395323b08/FLAG34a18b0ae [2023-11-19 07:41:49,503 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/data/d157e2bb2/f77de0e73ec84b05a886659395323b08 [2023-11-19 07:41:49,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:49,529 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:49,531 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:49,531 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:49,553 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:49,554 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,555 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a89976f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49, skipping insertion in model container [2023-11-19 07:41:49,556 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,582 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:49,760 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_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2023-11-19 07:41:49,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:49,776 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:49,798 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_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2023-11-19 07:41:49,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:49,814 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:49,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49 WrapperNode [2023-11-19 07:41:49,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:49,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:49,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:49,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:49,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,851 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-19 07:41:49,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:49,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:49,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:49,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:49,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:49,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:49,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:49,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:49,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (1/1) ... [2023-11-19 07:41:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:49,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:49,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:49,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:49,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:49,962 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-19 07:41:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-19 07:41:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:41:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:41:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:49,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:41:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:41:50,068 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:50,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:50,324 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:50,333 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:50,333 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:41:50,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:50 BoogieIcfgContainer [2023-11-19 07:41:50,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:50,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:50,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:50,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:50,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:49" (1/3) ... [2023-11-19 07:41:50,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53522a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:50, skipping insertion in model container [2023-11-19 07:41:50,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:49" (2/3) ... [2023-11-19 07:41:50,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53522a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:50, skipping insertion in model container [2023-11-19 07:41:50,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:50" (3/3) ... [2023-11-19 07:41:50,348 INFO L112 eAbstractionObserver]: Analyzing ICFG max20-1.i [2023-11-19 07:41:50,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:50,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:50,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:50,430 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;@11b86db6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:50,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:41:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:41:50,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:50,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:50,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:50,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash 350697856, now seen corresponding path program 1 times [2023-11-19 07:41:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082012595] [2023-11-19 07:41:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:50,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:41:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:41:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 07:41:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:41:50,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082012595] [2023-11-19 07:41:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082012595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:50,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:50,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141870943] [2023-11-19 07:41:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:50,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:41:50,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:41:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:41:50,706 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:41:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:50,726 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2023-11-19 07:41:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:41:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-19 07:41:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:50,733 INFO L225 Difference]: With dead ends: 54 [2023-11-19 07:41:50,734 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 07:41:50,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:41:50,746 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:50,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 07:41:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-19 07:41:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-19 07:41:50,785 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 29 [2023-11-19 07:41:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:50,785 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-19 07:41:50,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:41:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-19 07:41:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:41:50,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:50,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:50,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:50,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash -731724275, now seen corresponding path program 1 times [2023-11-19 07:41:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:50,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950706722] [2023-11-19 07:41:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:50,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:41:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-19 07:41:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 07:41:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 07:41:51,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:51,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950706722] [2023-11-19 07:41:51,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950706722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:51,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553021854] [2023-11-19 07:41:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:51,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:51,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:51,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:41:51,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:51,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553021854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:51,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:51,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:41:51,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591643841] [2023-11-19 07:41:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:51,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:51,240 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:41:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:51,257 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-11-19 07:41:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-19 07:41:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:51,259 INFO L225 Difference]: With dead ends: 48 [2023-11-19 07:41:51,260 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 07:41:51,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:51,262 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:51,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 07:41:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-19 07:41:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-19 07:41:51,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 29 [2023-11-19 07:41:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:51,272 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-19 07:41:51,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:41:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-19 07:41:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 07:41:51,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:51,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:51,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:51,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:51,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1391874411, now seen corresponding path program 1 times [2023-11-19 07:41:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:51,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495669144] [2023-11-19 07:41:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:41:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-19 07:41:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:41:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495669144] [2023-11-19 07:41:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495669144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:51,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026203378] [2023-11-19 07:41:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:51,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:51,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:51,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:51,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:51,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:41:51,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026203378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:51,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:51,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 07:41:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19001115] [2023-11-19 07:41:51,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:51,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:51,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:51,830 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:51,849 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-11-19 07:41:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-19 07:41:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:51,852 INFO L225 Difference]: With dead ends: 49 [2023-11-19 07:41:51,852 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 07:41:51,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:51,854 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 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 [2023-11-19 07:41:51,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 07:41:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-11-19 07:41:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-19 07:41:51,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 31 [2023-11-19 07:41:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:51,862 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-19 07:41:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-19 07:41:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:41:51,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:51,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:51,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:52,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:52,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:52,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1997828742, now seen corresponding path program 1 times [2023-11-19 07:41:52,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:52,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224623544] [2023-11-19 07:41:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:41:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-19 07:41:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:41:52,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224623544] [2023-11-19 07:41:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224623544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:52,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251470056] [2023-11-19 07:41:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:52,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:52,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:52,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:52,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:41:52,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:52,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251470056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:52,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:52,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 07:41:52,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269722158] [2023-11-19 07:41:52,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:52,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:52,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:52,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:52,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:52,465 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:52,490 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-11-19 07:41:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-19 07:41:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:52,495 INFO L225 Difference]: With dead ends: 44 [2023-11-19 07:41:52,495 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 07:41:52,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:52,498 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 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 [2023-11-19 07:41:52,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 07:41:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-19 07:41:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-19 07:41:52,512 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2023-11-19 07:41:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:52,514 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-19 07:41:52,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:41:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-19 07:41:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:41:52,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:52,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:52,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:52,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:52,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:52,725 INFO L85 PathProgramCache]: Analyzing trace with hash 271283108, now seen corresponding path program 1 times [2023-11-19 07:41:52,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:52,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087663839] [2023-11-19 07:41:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:52,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-19 07:41:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-19 07:41:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:41:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:41:52,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087663839] [2023-11-19 07:41:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087663839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739894342] [2023-11-19 07:41:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:52,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:52,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:52,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:52,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:41:52,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-19 07:41:53,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-19 07:41:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739894342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:53,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-19 07:41:53,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778815895] [2023-11-19 07:41:53,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:53,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:41:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:53,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:41:53,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:41:53,063 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:41:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:53,134 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-11-19 07:41:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:41:53,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2023-11-19 07:41:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:53,138 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:41:53,139 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 07:41:53,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:41:53,141 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:53,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 137 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 07:41:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-11-19 07:41:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-19 07:41:53,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 45 [2023-11-19 07:41:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:53,162 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-19 07:41:53,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:41:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-19 07:41:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:41:53,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:53,168 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:53,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:53,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:53,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 344212953, now seen corresponding path program 2 times [2023-11-19 07:41:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:53,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47343148] [2023-11-19 07:41:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-19 07:41:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:53,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-19 07:41:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:53,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-19 07:41:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-19 07:41:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:53,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47343148] [2023-11-19 07:41:53,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47343148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:53,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139233739] [2023-11-19 07:41:53,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:53,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:53,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:53,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:53,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:41:53,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:53,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:53,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:41:53,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 07:41:53,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 07:41:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139233739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:53,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:53,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-19 07:41:53,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53652068] [2023-11-19 07:41:53,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:53,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:41:53,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:41:53,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:41:53,899 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:41:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:53,962 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2023-11-19 07:41:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:41:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2023-11-19 07:41:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:53,964 INFO L225 Difference]: With dead ends: 80 [2023-11-19 07:41:53,964 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 07:41:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:41:53,966 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:53,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 07:41:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-19 07:41:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2023-11-19 07:41:53,975 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 63 [2023-11-19 07:41:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:53,975 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2023-11-19 07:41:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:41:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2023-11-19 07:41:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 07:41:53,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:53,978 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:54,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:54,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:54,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:54,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1309932629, now seen corresponding path program 3 times [2023-11-19 07:41:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446190452] [2023-11-19 07:41:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:54,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:54,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-19 07:41:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:54,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-19 07:41:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:54,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-19 07:41:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-19 07:41:54,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:54,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446190452] [2023-11-19 07:41:54,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446190452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:54,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339366727] [2023-11-19 07:41:54,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:54,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:54,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:54,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:54,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:41:54,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:41:54,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:54,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:41:54,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 07:41:54,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-19 07:41:54,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339366727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:54,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:54,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-19 07:41:54,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609046257] [2023-11-19 07:41:54,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:54,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:54,885 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:41:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:55,011 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2023-11-19 07:41:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:41:55,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2023-11-19 07:41:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:55,015 INFO L225 Difference]: With dead ends: 100 [2023-11-19 07:41:55,015 INFO L226 Difference]: Without dead ends: 71 [2023-11-19 07:41:55,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:41:55,017 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:55,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 142 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-19 07:41:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-11-19 07:41:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-11-19 07:41:55,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 77 [2023-11-19 07:41:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:55,025 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-11-19 07:41:55,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:41:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-11-19 07:41:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-19 07:41:55,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:55,033 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:55,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:55,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:55,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:55,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -906758027, now seen corresponding path program 4 times [2023-11-19 07:41:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957738468] [2023-11-19 07:41:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:55,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-19 07:41:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:55,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-19 07:41:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:55,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-19 07:41:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:41:55,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:55,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957738468] [2023-11-19 07:41:55,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957738468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:55,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044602804] [2023-11-19 07:41:55,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:41:55,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:55,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:55,785 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:41:55,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:41:55,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:55,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:41:55,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:41:56,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-19 07:41:56,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044602804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:56,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:56,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-11-19 07:41:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646212092] [2023-11-19 07:41:56,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:56,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:41:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:41:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:41:56,292 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:41:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:56,377 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-11-19 07:41:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:41:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 127 [2023-11-19 07:41:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:56,379 INFO L225 Difference]: With dead ends: 133 [2023-11-19 07:41:56,379 INFO L226 Difference]: Without dead ends: 88 [2023-11-19 07:41:56,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 247 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:41:56,381 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:56,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-19 07:41:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-19 07:41:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-11-19 07:41:56,391 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 127 [2023-11-19 07:41:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:56,391 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-11-19 07:41:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 07:41:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-11-19 07:41:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-19 07:41:56,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:56,394 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:56,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:56,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:56,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:56,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:56,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1458639549, now seen corresponding path program 5 times [2023-11-19 07:41:56,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:56,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897212567] [2023-11-19 07:41:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:56,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:56,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:41:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-19 07:41:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:56,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-19 07:41:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2023-11-19 07:41:56,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:56,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897212567] [2023-11-19 07:41:56,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897212567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:56,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486194268] [2023-11-19 07:41:56,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:41:56,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:56,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:56,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:56,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:41:57,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-19 07:41:57,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:57,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:41:57,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-11-19 07:41:57,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2023-11-19 07:41:58,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486194268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:58,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:58,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-19 07:41:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063118612] [2023-11-19 07:41:58,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:41:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:41:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:41:58,068 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:41:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:58,159 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2023-11-19 07:41:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:41:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2023-11-19 07:41:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:58,164 INFO L225 Difference]: With dead ends: 163 [2023-11-19 07:41:58,164 INFO L226 Difference]: Without dead ends: 120 [2023-11-19 07:41:58,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:41:58,167 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:58,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 122 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-19 07:41:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-11-19 07:41:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 115 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2023-11-19 07:41:58,182 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 145 [2023-11-19 07:41:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:58,183 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2023-11-19 07:41:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:41:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2023-11-19 07:41:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-11-19 07:41:58,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:58,191 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:58,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:58,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:58,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1701877733, now seen corresponding path program 6 times [2023-11-19 07:41:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728537064] [2023-11-19 07:41:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:41:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-11-19 07:41:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-11-19 07:41:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 1979 trivial. 0 not checked. [2023-11-19 07:41:59,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:59,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728537064] [2023-11-19 07:41:59,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728537064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:59,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919377406] [2023-11-19 07:41:59,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:41:59,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:59,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:59,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:59,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:41:59,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-19 07:41:59,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:59,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:41:59,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2351 trivial. 0 not checked. [2023-11-19 07:41:59,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2023-11-19 07:41:59,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919377406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:59,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:59,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2023-11-19 07:41:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068354776] [2023-11-19 07:41:59,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:41:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:41:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:41:59,813 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:41:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:59,926 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2023-11-19 07:41:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:41:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 241 [2023-11-19 07:41:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:59,931 INFO L225 Difference]: With dead ends: 210 [2023-11-19 07:41:59,931 INFO L226 Difference]: Without dead ends: 135 [2023-11-19 07:41:59,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:41:59,934 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:59,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 139 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-19 07:41:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2023-11-19 07:41:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:41:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2023-11-19 07:41:59,963 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 241 [2023-11-19 07:41:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:59,964 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2023-11-19 07:41:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.434782608695652) internal successors, (102), 23 states have internal predecessors, (102), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:41:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2023-11-19 07:41:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-19 07:41:59,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:59,971 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:00,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:42:00,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:00,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1512745298, now seen corresponding path program 7 times [2023-11-19 07:42:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453314124] [2023-11-19 07:42:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:00,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:42:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-19 07:42:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-11-19 07:42:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2023-11-19 07:42:01,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453314124] [2023-11-19 07:42:01,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453314124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516523076] [2023-11-19 07:42:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:42:01,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:01,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:01,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:42:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:01,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:42:01,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 2247 trivial. 0 not checked. [2023-11-19 07:42:01,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2023-11-19 07:42:02,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516523076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:02,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:02,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2023-11-19 07:42:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983224756] [2023-11-19 07:42:02,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:42:02,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:42:02,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:42:02,107 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:42:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:02,228 INFO L93 Difference]: Finished difference Result 239 states and 288 transitions. [2023-11-19 07:42:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:42:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 261 [2023-11-19 07:42:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:02,233 INFO L225 Difference]: With dead ends: 239 [2023-11-19 07:42:02,234 INFO L226 Difference]: Without dead ends: 152 [2023-11-19 07:42:02,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 512 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:42:02,236 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:02,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 134 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-19 07:42:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-19 07:42:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1564625850340136) internal successors, (170), 147 states have internal predecessors, (170), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:42:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2023-11-19 07:42:02,260 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 261 [2023-11-19 07:42:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:02,261 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2023-11-19 07:42:02,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:42:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2023-11-19 07:42:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-19 07:42:02,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:02,267 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:02,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:02,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:42:02,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:02,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1734587211, now seen corresponding path program 8 times [2023-11-19 07:42:02,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:02,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950758827] [2023-11-19 07:42:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:42:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:02,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-11-19 07:42:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:02,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2023-11-19 07:42:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2023-11-19 07:42:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950758827] [2023-11-19 07:42:03,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950758827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153387831] [2023-11-19 07:42:03,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:42:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:03,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:03,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:42:03,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:42:03,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:03,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:42:03,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 3290 proven. 36 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2023-11-19 07:42:03,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2023-11-19 07:42:03,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153387831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:03,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:03,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-19 07:42:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850575949] [2023-11-19 07:42:03,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:42:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:42:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:42:03,542 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:42:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:03,598 INFO L93 Difference]: Finished difference Result 259 states and 311 transitions. [2023-11-19 07:42:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:42:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 321 [2023-11-19 07:42:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:03,600 INFO L225 Difference]: With dead ends: 259 [2023-11-19 07:42:03,600 INFO L226 Difference]: Without dead ends: 168 [2023-11-19 07:42:03,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:42:03,602 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:03,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:42:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-19 07:42:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-19 07:42:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.1411042944785277) internal successors, (186), 163 states have internal predecessors, (186), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:42:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 192 transitions. [2023-11-19 07:42:03,610 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 192 transitions. Word has length 321 [2023-11-19 07:42:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:03,611 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 192 transitions. [2023-11-19 07:42:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:42:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 192 transitions. [2023-11-19 07:42:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2023-11-19 07:42:03,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:03,617 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:03,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:03,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:42:03,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:03,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2111430565, now seen corresponding path program 9 times [2023-11-19 07:42:03,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:03,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061220314] [2023-11-19 07:42:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:03,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:42:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-11-19 07:42:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:04,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2023-11-19 07:42:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2023-11-19 07:42:04,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061220314] [2023-11-19 07:42:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061220314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:04,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364030806] [2023-11-19 07:42:04,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:42:04,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:04,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:42:06,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-19 07:42:06,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:06,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:42:06,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 3290 proven. 196 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2023-11-19 07:42:06,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2023-11-19 07:42:07,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364030806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:07,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:42:07,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-11-19 07:42:07,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381069815] [2023-11-19 07:42:07,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:42:07,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:42:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:42:07,082 INFO L87 Difference]: Start difference. First operand 168 states and 192 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:42:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:07,168 INFO L93 Difference]: Finished difference Result 269 states and 318 transitions. [2023-11-19 07:42:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:42:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 337 [2023-11-19 07:42:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:07,171 INFO L225 Difference]: With dead ends: 269 [2023-11-19 07:42:07,171 INFO L226 Difference]: Without dead ends: 178 [2023-11-19 07:42:07,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 664 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:42:07,173 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:07,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 148 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:42:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-19 07:42:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2023-11-19 07:42:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 173 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:42:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 202 transitions. [2023-11-19 07:42:07,184 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 202 transitions. Word has length 337 [2023-11-19 07:42:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:07,185 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 202 transitions. [2023-11-19 07:42:07,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:42:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 202 transitions. [2023-11-19 07:42:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2023-11-19 07:42:07,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:07,192 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:42:07,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:42:07,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:07,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -349686853, now seen corresponding path program 10 times [2023-11-19 07:42:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119845919] [2023-11-19 07:42:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:11,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-19 07:42:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-11-19 07:42:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2023-11-19 07:42:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8036 backedges. 1322 proven. 4084 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2023-11-19 07:42:13,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:13,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119845919] [2023-11-19 07:42:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119845919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:42:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545725235] [2023-11-19 07:42:13,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:42:13,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:13,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:13,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd08895e-6bf3-40e2-a64c-4a32b4db0bab/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:42:14,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:42:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:42:14,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:42:14,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:14,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:42:14,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 22