./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-89.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-89.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5e56896530f71bea1daff440246bbdce733626db219e470948d24943c0708578 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:59,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:59,896 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:59,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:59,901 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:59,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:59,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:59,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:59,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:59,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:59,954 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:59,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:59,954 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:59,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:59,957 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:59,957 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:59,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:59,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:59,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:59,959 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:59,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:59,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:59,960 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:59,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:59,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:59,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:59,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:59,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:59,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:59,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:59,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:59,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:59,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:59,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:59,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:59,966 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:59,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:59,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:59,967 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:59,967 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_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e56896530f71bea1daff440246bbdce733626db219e470948d24943c0708578 [2023-11-06 23:04:00,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:04:00,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:04:00,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:04:00,273 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:04:00,274 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:04:00,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-89.i [2023-11-06 23:04:03,431 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:04:03,710 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:04:03,711 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-89.i [2023-11-06 23:04:03,721 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/data/7db08cf4a/f2a54278e5474e2fac54c0eb5bf23e3c/FLAG75dc6bfbc [2023-11-06 23:04:03,736 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/data/7db08cf4a/f2a54278e5474e2fac54c0eb5bf23e3c [2023-11-06 23:04:03,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:04:03,741 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:04:03,743 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:03,743 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:04:03,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:04:03,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:03" (1/1) ... [2023-11-06 23:04:03,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4fdf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:03, skipping insertion in model container [2023-11-06 23:04:03,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:04:03" (1/1) ... [2023-11-06 23:04:03,783 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:04:04,002 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_f1bbd7a2-6234-4449-aa8a-0a7384bac181/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-89.i[916,929] [2023-11-06 23:04:04,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:04,123 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:04:04,139 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_f1bbd7a2-6234-4449-aa8a-0a7384bac181/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-s_file-89.i[916,929] [2023-11-06 23:04:04,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:04:04,237 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:04:04,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04 WrapperNode [2023-11-06 23:04:04,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:04:04,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:04,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:04:04,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:04:04,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,311 INFO L138 Inliner]: procedures = 26, calls = 132, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 383 [2023-11-06 23:04:04,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:04:04,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:04:04,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:04:04,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:04:04,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,373 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:04:04,374 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:04:04,374 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:04:04,374 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:04:04,375 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (1/1) ... [2023-11-06 23:04:04,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:04:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:04,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:04:04,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:04:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:04:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:04:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:04:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:04:04,455 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:04:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:04:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:04:04,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:04:04,556 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:04:04,559 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:04:05,162 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:04:05,170 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:04:05,170 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:04:05,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:05 BoogieIcfgContainer [2023-11-06 23:04:05,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:04:05,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:04:05,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:04:05,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:04:05,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:04:03" (1/3) ... [2023-11-06 23:04:05,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34745d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:05, skipping insertion in model container [2023-11-06 23:04:05,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:04:04" (2/3) ... [2023-11-06 23:04:05,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34745d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:04:05, skipping insertion in model container [2023-11-06 23:04:05,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:04:05" (3/3) ... [2023-11-06 23:04:05,183 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-s_file-89.i [2023-11-06 23:04:05,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:04:05,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:04:05,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:04:05,272 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@ca4bfe5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:04:05,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:04:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 85 states have internal predecessors, (122), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:04:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:05,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:05,293 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:05,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:05,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash 983671971, now seen corresponding path program 1 times [2023-11-06 23:04:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142623176] [2023-11-06 23:04:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:05,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:05,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:05,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142623176] [2023-11-06 23:04:05,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:04:05,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496204710] [2023-11-06 23:04:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:05,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:05,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:05,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:04:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:05,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:04:05,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-06 23:04:05,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496204710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:04:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038381664] [2023-11-06 23:04:05,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:05,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:04:05,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:04:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:04:05,875 INFO L87 Difference]: Start difference. First operand has 100 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 85 states have internal predecessors, (122), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 23:04:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:05,930 INFO L93 Difference]: Finished difference Result 193 states and 303 transitions. [2023-11-06 23:04:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:04:05,932 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 109 [2023-11-06 23:04:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:05,946 INFO L225 Difference]: With dead ends: 193 [2023-11-06 23:04:05,947 INFO L226 Difference]: Without dead ends: 96 [2023-11-06 23:04:05,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:04:05,957 INFO L413 NwaCegarLoop]: 139 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, 139 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 [2023-11-06 23:04:05,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-06 23:04:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-06 23:04:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 81 states have (on average 1.3950617283950617) internal successors, (113), 81 states have internal predecessors, (113), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:04:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 139 transitions. [2023-11-06 23:04:06,048 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 139 transitions. Word has length 109 [2023-11-06 23:04:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:06,049 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 139 transitions. [2023-11-06 23:04:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 23:04:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 139 transitions. [2023-11-06 23:04:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:06,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:06,058 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:06,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:06,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:04:06,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:06,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1135548361, now seen corresponding path program 1 times [2023-11-06 23:04:06,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:06,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015160790] [2023-11-06 23:04:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:06,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:06,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003911770] [2023-11-06 23:04:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:06,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:06,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:06,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:06,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:04:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:06,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:06,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015160790] [2023-11-06 23:04:06,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003911770] [2023-11-06 23:04:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003911770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:06,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:06,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:06,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84485388] [2023-11-06 23:04:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:06,687 INFO L87 Difference]: Start difference. First operand 96 states and 139 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:06,775 INFO L93 Difference]: Finished difference Result 201 states and 292 transitions. [2023-11-06 23:04:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:06,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:06,783 INFO L225 Difference]: With dead ends: 201 [2023-11-06 23:04:06,783 INFO L226 Difference]: Without dead ends: 108 [2023-11-06 23:04:06,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:06,788 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 21 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:06,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 404 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-06 23:04:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2023-11-06 23:04:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 83 states have internal predecessors, (115), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:04:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 141 transitions. [2023-11-06 23:04:06,821 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 141 transitions. Word has length 109 [2023-11-06 23:04:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:06,825 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 141 transitions. [2023-11-06 23:04:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 141 transitions. [2023-11-06 23:04:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:06,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:06,832 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:06,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 23:04:07,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:07,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1815606731, now seen corresponding path program 1 times [2023-11-06 23:04:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076450384] [2023-11-06 23:04:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:07,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:07,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634634559] [2023-11-06 23:04:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:07,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:07,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:07,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:07,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:04:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:07,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:07,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:07,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:07,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076450384] [2023-11-06 23:04:07,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634634559] [2023-11-06 23:04:07,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634634559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:07,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:07,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728971083] [2023-11-06 23:04:07,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:07,340 INFO L87 Difference]: Start difference. First operand 98 states and 141 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:07,376 INFO L93 Difference]: Finished difference Result 201 states and 290 transitions. [2023-11-06 23:04:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:07,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:07,378 INFO L225 Difference]: With dead ends: 201 [2023-11-06 23:04:07,379 INFO L226 Difference]: Without dead ends: 106 [2023-11-06 23:04:07,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:07,387 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 12 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:07,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 402 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-06 23:04:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-11-06 23:04:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 85 states have internal predecessors, (117), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 23:04:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2023-11-06 23:04:07,407 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 109 [2023-11-06 23:04:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:07,410 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2023-11-06 23:04:07,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2023-11-06 23:04:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:07,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:07,413 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:07,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:07,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:07,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:07,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -704353203, now seen corresponding path program 1 times [2023-11-06 23:04:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:07,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628672373] [2023-11-06 23:04:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:07,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:07,695 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:07,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789292193] [2023-11-06 23:04:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:07,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:07,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:07,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:04:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:07,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:04:07,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:08,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2023-11-06 23:04:08,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:08,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 55 [2023-11-06 23:04:08,356 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:08,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 44 [2023-11-06 23:04:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:08,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628672373] [2023-11-06 23:04:08,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789292193] [2023-11-06 23:04:08,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789292193] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:08,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2023-11-06 23:04:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549825070] [2023-11-06 23:04:08,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:08,805 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:09,849 INFO L93 Difference]: Finished difference Result 340 states and 488 transitions. [2023-11-06 23:04:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:04:09,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:09,853 INFO L225 Difference]: With dead ends: 340 [2023-11-06 23:04:09,853 INFO L226 Difference]: Without dead ends: 243 [2023-11-06 23:04:09,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:04:09,855 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 309 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:09,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 652 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:04:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-06 23:04:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 176. [2023-11-06 23:04:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 153 states have (on average 1.3856209150326797) internal successors, (212), 154 states have internal predecessors, (212), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-06 23:04:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 252 transitions. [2023-11-06 23:04:09,876 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 252 transitions. Word has length 109 [2023-11-06 23:04:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:09,877 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 252 transitions. [2023-11-06 23:04:09,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 252 transitions. [2023-11-06 23:04:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:09,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:09,879 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:09,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:10,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:10,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1725421557, now seen corresponding path program 1 times [2023-11-06 23:04:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580318676] [2023-11-06 23:04:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:10,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:10,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405598436] [2023-11-06 23:04:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:10,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:10,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:10,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:04:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:10,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:10,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:10,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-06 23:04:10,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:10,398 INFO L351 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 43 treesize of output 34 [2023-11-06 23:04:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:10,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:10,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580318676] [2023-11-06 23:04:10,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:10,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405598436] [2023-11-06 23:04:10,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405598436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:10,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610498671] [2023-11-06 23:04:10,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:10,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:10,459 INFO L87 Difference]: Start difference. First operand 176 states and 252 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:10,797 INFO L93 Difference]: Finished difference Result 362 states and 515 transitions. [2023-11-06 23:04:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:10,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:10,802 INFO L225 Difference]: With dead ends: 362 [2023-11-06 23:04:10,803 INFO L226 Difference]: Without dead ends: 189 [2023-11-06 23:04:10,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:10,804 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 159 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:10,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 392 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-06 23:04:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2023-11-06 23:04:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 161 states have internal predecessors, (217), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-06 23:04:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 263 transitions. [2023-11-06 23:04:10,848 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 263 transitions. Word has length 109 [2023-11-06 23:04:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:10,848 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 263 transitions. [2023-11-06 23:04:10,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 263 transitions. [2023-11-06 23:04:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:10,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:10,851 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:10,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:11,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:11,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:11,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash -382462684, now seen corresponding path program 1 times [2023-11-06 23:04:11,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:11,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411497487] [2023-11-06 23:04:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:11,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:11,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322350507] [2023-11-06 23:04:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:11,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:11,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:04:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:11,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:04:11,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:11,359 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:11,359 INFO L351 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 47 treesize of output 32 [2023-11-06 23:04:11,396 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:11,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 23:04:11,451 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:11,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 26 [2023-11-06 23:04:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:11,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411497487] [2023-11-06 23:04:11,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322350507] [2023-11-06 23:04:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322350507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:11,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725419497] [2023-11-06 23:04:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:11,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:11,489 INFO L87 Difference]: Start difference. First operand 186 states and 263 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:12,030 INFO L93 Difference]: Finished difference Result 413 states and 587 transitions. [2023-11-06 23:04:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:12,034 INFO L225 Difference]: With dead ends: 413 [2023-11-06 23:04:12,034 INFO L226 Difference]: Without dead ends: 237 [2023-11-06 23:04:12,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:12,036 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 120 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:12,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 468 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-06 23:04:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 195. [2023-11-06 23:04:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 168 states have (on average 1.375) internal successors, (231), 170 states have internal predecessors, (231), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-06 23:04:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 277 transitions. [2023-11-06 23:04:12,056 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 277 transitions. Word has length 109 [2023-11-06 23:04:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:12,056 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 277 transitions. [2023-11-06 23:04:12,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 277 transitions. [2023-11-06 23:04:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:12,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:12,059 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:12,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:12,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:12,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:12,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash -485498485, now seen corresponding path program 1 times [2023-11-06 23:04:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:12,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098545653] [2023-11-06 23:04:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:12,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:12,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120791473] [2023-11-06 23:04:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:12,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:12,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:12,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:04:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:12,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:12,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:12,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 23:04:12,535 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:12,536 INFO L351 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 42 treesize of output 33 [2023-11-06 23:04:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:12,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:12,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098545653] [2023-11-06 23:04:12,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120791473] [2023-11-06 23:04:12,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120791473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:12,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:12,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309090969] [2023-11-06 23:04:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:12,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:12,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:12,585 INFO L87 Difference]: Start difference. First operand 195 states and 277 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:13,043 INFO L93 Difference]: Finished difference Result 471 states and 664 transitions. [2023-11-06 23:04:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:13,047 INFO L225 Difference]: With dead ends: 471 [2023-11-06 23:04:13,047 INFO L226 Difference]: Without dead ends: 286 [2023-11-06 23:04:13,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:13,049 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 248 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:13,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 490 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:04:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-06 23:04:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2023-11-06 23:04:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 209 states have (on average 1.3779904306220097) internal successors, (288), 211 states have internal predecessors, (288), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-06 23:04:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 334 transitions. [2023-11-06 23:04:13,068 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 334 transitions. Word has length 109 [2023-11-06 23:04:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:13,068 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 334 transitions. [2023-11-06 23:04:13,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 334 transitions. [2023-11-06 23:04:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:13,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:13,071 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:13,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:13,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:04:13,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:13,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:13,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1506566839, now seen corresponding path program 1 times [2023-11-06 23:04:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:13,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444110279] [2023-11-06 23:04:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:13,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:13,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:13,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041856757] [2023-11-06 23:04:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:13,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:13,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:13,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:04:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:13,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:04:13,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:13,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:13,511 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:13,512 INFO L351 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 38 treesize of output 29 [2023-11-06 23:04:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:13,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:13,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444110279] [2023-11-06 23:04:13,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041856757] [2023-11-06 23:04:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041856757] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:13,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:13,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2023-11-06 23:04:13,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227326976] [2023-11-06 23:04:13,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:13,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:13,729 INFO L87 Difference]: Start difference. First operand 237 states and 334 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:14,224 INFO L93 Difference]: Finished difference Result 532 states and 744 transitions. [2023-11-06 23:04:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:04:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:14,227 INFO L225 Difference]: With dead ends: 532 [2023-11-06 23:04:14,227 INFO L226 Difference]: Without dead ends: 298 [2023-11-06 23:04:14,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:04:14,229 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 250 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:14,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 884 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:04:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-06 23:04:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 284. [2023-11-06 23:04:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 236 states have (on average 1.3305084745762712) internal successors, (314), 239 states have internal predecessors, (314), 40 states have call successors, (40), 7 states have call predecessors, (40), 7 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-06 23:04:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 394 transitions. [2023-11-06 23:04:14,278 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 394 transitions. Word has length 109 [2023-11-06 23:04:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:14,278 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 394 transitions. [2023-11-06 23:04:14,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 394 transitions. [2023-11-06 23:04:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:14,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:14,281 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:14,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:14,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:04:14,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:14,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 457002274, now seen corresponding path program 1 times [2023-11-06 23:04:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:14,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545335545] [2023-11-06 23:04:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:14,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:14,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615045077] [2023-11-06 23:04:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:14,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:04:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:14,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:14,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:14,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 23:04:14,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:14,769 INFO L351 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 42 treesize of output 33 [2023-11-06 23:04:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:14,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:14,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545335545] [2023-11-06 23:04:14,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:14,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615045077] [2023-11-06 23:04:14,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615045077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:14,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719317415] [2023-11-06 23:04:14,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:14,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:14,824 INFO L87 Difference]: Start difference. First operand 284 states and 394 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:15,238 INFO L93 Difference]: Finished difference Result 677 states and 950 transitions. [2023-11-06 23:04:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:15,243 INFO L225 Difference]: With dead ends: 677 [2023-11-06 23:04:15,243 INFO L226 Difference]: Without dead ends: 419 [2023-11-06 23:04:15,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:15,245 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 334 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:15,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 492 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-06 23:04:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 349. [2023-11-06 23:04:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 297 states have (on average 1.3501683501683501) internal successors, (401), 301 states have internal predecessors, (401), 43 states have call successors, (43), 8 states have call predecessors, (43), 8 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-06 23:04:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2023-11-06 23:04:15,275 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 109 [2023-11-06 23:04:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:15,275 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2023-11-06 23:04:15,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2023-11-06 23:04:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:15,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:15,278 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:15,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:15,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 23:04:15,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:15,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -564066080, now seen corresponding path program 1 times [2023-11-06 23:04:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878199146] [2023-11-06 23:04:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:15,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:15,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296807006] [2023-11-06 23:04:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:15,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:15,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:15,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:04:15,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:15,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:15,731 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:15,731 INFO L351 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 38 treesize of output 29 [2023-11-06 23:04:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:15,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:15,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878199146] [2023-11-06 23:04:15,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:15,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296807006] [2023-11-06 23:04:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296807006] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:15,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:15,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2023-11-06 23:04:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473800501] [2023-11-06 23:04:15,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:15,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:15,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:15,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:15,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:15,975 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:16,598 INFO L93 Difference]: Finished difference Result 760 states and 1064 transitions. [2023-11-06 23:04:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:04:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:16,604 INFO L225 Difference]: With dead ends: 760 [2023-11-06 23:04:16,604 INFO L226 Difference]: Without dead ends: 437 [2023-11-06 23:04:16,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:04:16,606 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 263 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:16,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 792 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-06 23:04:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 318. [2023-11-06 23:04:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 263 states have (on average 1.338403041825095) internal successors, (352), 266 states have internal predecessors, (352), 46 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 444 transitions. [2023-11-06 23:04:16,648 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 444 transitions. Word has length 109 [2023-11-06 23:04:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:16,649 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 444 transitions. [2023-11-06 23:04:16,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 444 transitions. [2023-11-06 23:04:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:16,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:16,651 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:16,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:16,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:16,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:16,858 INFO L85 PathProgramCache]: Analyzing trace with hash 778892793, now seen corresponding path program 1 times [2023-11-06 23:04:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691856859] [2023-11-06 23:04:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:16,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:16,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364508779] [2023-11-06 23:04:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:16,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:16,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:16,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:04:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:17,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:17,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:17,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 23:04:17,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:17,138 INFO L351 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 42 treesize of output 33 [2023-11-06 23:04:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:17,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:17,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:17,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691856859] [2023-11-06 23:04:17,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:17,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364508779] [2023-11-06 23:04:17,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364508779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:17,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:17,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:17,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876436452] [2023-11-06 23:04:17,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:17,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:17,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:17,181 INFO L87 Difference]: Start difference. First operand 318 states and 444 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:17,593 INFO L93 Difference]: Finished difference Result 711 states and 998 transitions. [2023-11-06 23:04:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:17,598 INFO L225 Difference]: With dead ends: 711 [2023-11-06 23:04:17,598 INFO L226 Difference]: Without dead ends: 435 [2023-11-06 23:04:17,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:17,600 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 324 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:17,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 528 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:04:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-06 23:04:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 318. [2023-11-06 23:04:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 263 states have (on average 1.3346007604562737) internal successors, (351), 266 states have internal predecessors, (351), 46 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 443 transitions. [2023-11-06 23:04:17,629 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 443 transitions. Word has length 109 [2023-11-06 23:04:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:17,630 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 443 transitions. [2023-11-06 23:04:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 443 transitions. [2023-11-06 23:04:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:17,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:17,632 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:17,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:17,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:17,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:17,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -242175561, now seen corresponding path program 1 times [2023-11-06 23:04:17,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:17,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956712912] [2023-11-06 23:04:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:17,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:17,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437527051] [2023-11-06 23:04:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:17,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:17,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:17,866 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:17,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:04:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:18,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:04:18,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:18,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:18,105 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:18,106 INFO L351 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 38 treesize of output 29 [2023-11-06 23:04:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:18,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:18,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956712912] [2023-11-06 23:04:18,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437527051] [2023-11-06 23:04:18,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437527051] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:18,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:18,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2023-11-06 23:04:18,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290310017] [2023-11-06 23:04:18,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:18,338 INFO L87 Difference]: Start difference. First operand 318 states and 443 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:18,953 INFO L93 Difference]: Finished difference Result 713 states and 997 transitions. [2023-11-06 23:04:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:04:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:18,957 INFO L225 Difference]: With dead ends: 713 [2023-11-06 23:04:18,957 INFO L226 Difference]: Without dead ends: 437 [2023-11-06 23:04:18,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:04:18,959 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 253 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:18,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1045 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-06 23:04:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 316. [2023-11-06 23:04:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 261 states have (on average 1.3333333333333333) internal successors, (348), 264 states have internal predecessors, (348), 46 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 440 transitions. [2023-11-06 23:04:18,985 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 440 transitions. Word has length 109 [2023-11-06 23:04:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:18,985 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 440 transitions. [2023-11-06 23:04:18,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 440 transitions. [2023-11-06 23:04:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:18,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:18,988 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:18,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:19,194 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:19,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 238147556, now seen corresponding path program 1 times [2023-11-06 23:04:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029587378] [2023-11-06 23:04:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:19,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:19,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520888611] [2023-11-06 23:04:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:19,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:19,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:19,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:04:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:19,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:04:19,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:19,485 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:19,485 INFO L351 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 45 treesize of output 30 [2023-11-06 23:04:19,499 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:19,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 23:04:19,533 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:19,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 24 [2023-11-06 23:04:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:19,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:19,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029587378] [2023-11-06 23:04:19,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520888611] [2023-11-06 23:04:19,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520888611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:19,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:19,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285265863] [2023-11-06 23:04:19,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:19,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:19,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:19,570 INFO L87 Difference]: Start difference. First operand 316 states and 440 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:20,080 INFO L93 Difference]: Finished difference Result 628 states and 879 transitions. [2023-11-06 23:04:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:20,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:20,091 INFO L225 Difference]: With dead ends: 628 [2023-11-06 23:04:20,091 INFO L226 Difference]: Without dead ends: 354 [2023-11-06 23:04:20,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:20,093 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 117 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:20,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 525 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:04:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-06 23:04:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 314. [2023-11-06 23:04:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 259 states have (on average 1.3243243243243243) internal successors, (343), 262 states have internal predecessors, (343), 46 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 435 transitions. [2023-11-06 23:04:20,120 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 435 transitions. Word has length 109 [2023-11-06 23:04:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:20,121 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 435 transitions. [2023-11-06 23:04:20,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 435 transitions. [2023-11-06 23:04:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:20,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:20,123 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:20,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:04:20,330 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:20,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 560038075, now seen corresponding path program 1 times [2023-11-06 23:04:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623756994] [2023-11-06 23:04:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:20,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100032592] [2023-11-06 23:04:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:20,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:20,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:20,355 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:04:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:20,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:04:20,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:20,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2023-11-06 23:04:20,654 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:20,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 55 [2023-11-06 23:04:20,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:20,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 44 [2023-11-06 23:04:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:20,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:21,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623756994] [2023-11-06 23:04:21,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100032592] [2023-11-06 23:04:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100032592] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2023-11-06 23:04:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260328897] [2023-11-06 23:04:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:21,112 INFO L87 Difference]: Start difference. First operand 314 states and 435 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:22,043 INFO L93 Difference]: Finished difference Result 626 states and 871 transitions. [2023-11-06 23:04:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:04:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:22,047 INFO L225 Difference]: With dead ends: 626 [2023-11-06 23:04:22,047 INFO L226 Difference]: Without dead ends: 354 [2023-11-06 23:04:22,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:04:22,049 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 238 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:22,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 919 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:04:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-06 23:04:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 321. [2023-11-06 23:04:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 265 states have (on average 1.3169811320754716) internal successors, (349), 268 states have internal predecessors, (349), 46 states have call successors, (46), 9 states have call predecessors, (46), 9 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 441 transitions. [2023-11-06 23:04:22,074 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 441 transitions. Word has length 109 [2023-11-06 23:04:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:22,074 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 441 transitions. [2023-11-06 23:04:22,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 441 transitions. [2023-11-06 23:04:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:04:22,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:22,077 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:22,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:22,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:22,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:22,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -461030279, now seen corresponding path program 1 times [2023-11-06 23:04:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:22,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478080353] [2023-11-06 23:04:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:22,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:22,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412251360] [2023-11-06 23:04:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:22,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:22,332 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:22,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:04:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:22,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:22,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:22,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-06 23:04:22,573 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:22,573 INFO L351 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 43 treesize of output 34 [2023-11-06 23:04:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:22,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:22,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478080353] [2023-11-06 23:04:22,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412251360] [2023-11-06 23:04:22,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412251360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:22,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:22,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832672913] [2023-11-06 23:04:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:22,614 INFO L87 Difference]: Start difference. First operand 321 states and 441 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:22,934 INFO L93 Difference]: Finished difference Result 603 states and 830 transitions. [2023-11-06 23:04:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 109 [2023-11-06 23:04:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:22,937 INFO L225 Difference]: With dead ends: 603 [2023-11-06 23:04:22,937 INFO L226 Difference]: Without dead ends: 324 [2023-11-06 23:04:22,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:22,939 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 149 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:22,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 570 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-06 23:04:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2023-11-06 23:04:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 265 states have (on average 1.3094339622641509) internal successors, (347), 268 states have internal predecessors, (347), 46 states have call successors, (46), 10 states have call predecessors, (46), 10 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 439 transitions. [2023-11-06 23:04:22,963 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 439 transitions. Word has length 109 [2023-11-06 23:04:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:22,963 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 439 transitions. [2023-11-06 23:04:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 439 transitions. [2023-11-06 23:04:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 23:04:22,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:22,965 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:22,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:23,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:04:23,172 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:23,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:23,173 INFO L85 PathProgramCache]: Analyzing trace with hash -272774337, now seen corresponding path program 1 times [2023-11-06 23:04:23,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:23,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307270518] [2023-11-06 23:04:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:23,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:23,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:23,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415403892] [2023-11-06 23:04:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:23,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:23,212 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:23,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:04:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:23,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:04:23,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:23,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:23,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307270518] [2023-11-06 23:04:23,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:23,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415403892] [2023-11-06 23:04:23,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415403892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:23,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:23,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:23,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014956507] [2023-11-06 23:04:23,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:23,434 INFO L87 Difference]: Start difference. First operand 322 states and 439 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:23,487 INFO L93 Difference]: Finished difference Result 680 states and 940 transitions. [2023-11-06 23:04:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2023-11-06 23:04:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:23,490 INFO L225 Difference]: With dead ends: 680 [2023-11-06 23:04:23,491 INFO L226 Difference]: Without dead ends: 400 [2023-11-06 23:04:23,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:23,492 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 115 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:23,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 501 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-06 23:04:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 331. [2023-11-06 23:04:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 274 states have (on average 1.2992700729927007) internal successors, (356), 277 states have internal predecessors, (356), 46 states have call successors, (46), 10 states have call predecessors, (46), 10 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-06 23:04:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2023-11-06 23:04:23,515 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 111 [2023-11-06 23:04:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:23,516 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2023-11-06 23:04:23,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2023-11-06 23:04:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-06 23:04:23,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:23,518 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:23,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:23,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:04:23,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:23,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash -247824766, now seen corresponding path program 1 times [2023-11-06 23:04:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:23,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224052266] [2023-11-06 23:04:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:23,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:23,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:23,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614288033] [2023-11-06 23:04:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:23,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:23,750 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:23,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:04:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:23,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:04:23,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:23,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-11-06 23:04:24,012 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:24,013 INFO L351 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 31 treesize of output 22 [2023-11-06 23:04:24,021 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:24,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 40 [2023-11-06 23:04:24,122 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:24,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 28 [2023-11-06 23:04:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:24,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:24,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:24,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224052266] [2023-11-06 23:04:24,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:24,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614288033] [2023-11-06 23:04:24,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614288033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:24,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:24,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:24,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83403983] [2023-11-06 23:04:24,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:24,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:24,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:24,138 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:24,439 INFO L93 Difference]: Finished difference Result 643 states and 870 transitions. [2023-11-06 23:04:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 113 [2023-11-06 23:04:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:24,443 INFO L225 Difference]: With dead ends: 643 [2023-11-06 23:04:24,443 INFO L226 Difference]: Without dead ends: 354 [2023-11-06 23:04:24,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:24,445 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 111 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:24,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 468 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-06 23:04:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 337. [2023-11-06 23:04:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 281 states have (on average 1.291814946619217) internal successors, (363), 284 states have internal predecessors, (363), 44 states have call successors, (44), 11 states have call predecessors, (44), 11 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-06 23:04:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 451 transitions. [2023-11-06 23:04:24,473 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 451 transitions. Word has length 113 [2023-11-06 23:04:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:24,473 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 451 transitions. [2023-11-06 23:04:24,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 451 transitions. [2023-11-06 23:04:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-06 23:04:24,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:24,476 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:24,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:24,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:04:24,683 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:24,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash -249671808, now seen corresponding path program 1 times [2023-11-06 23:04:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:24,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586021701] [2023-11-06 23:04:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:24,718 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:24,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050286502] [2023-11-06 23:04:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:24,720 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:24,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:04:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:25,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:04:25,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:25,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:25,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:25,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:25,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:25,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:04:25,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 23:04:25,258 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:25,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-06 23:04:25,279 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:25,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 48 [2023-11-06 23:04:25,575 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:25,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 33 [2023-11-06 23:04:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:25,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:25,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586021701] [2023-11-06 23:04:25,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:25,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050286502] [2023-11-06 23:04:25,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050286502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:25,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:25,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:04:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920564376] [2023-11-06 23:04:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:25,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:25,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:25,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:25,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:25,610 INFO L87 Difference]: Start difference. First operand 337 states and 451 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:26,633 INFO L93 Difference]: Finished difference Result 562 states and 781 transitions. [2023-11-06 23:04:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:04:26,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 113 [2023-11-06 23:04:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:26,638 INFO L225 Difference]: With dead ends: 562 [2023-11-06 23:04:26,638 INFO L226 Difference]: Without dead ends: 560 [2023-11-06 23:04:26,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:04:26,639 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 376 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:26,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 648 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:04:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-11-06 23:04:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 346. [2023-11-06 23:04:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 290 states have (on average 1.282758620689655) internal successors, (372), 293 states have internal predecessors, (372), 44 states have call successors, (44), 11 states have call predecessors, (44), 11 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-06 23:04:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 460 transitions. [2023-11-06 23:04:26,676 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 460 transitions. Word has length 113 [2023-11-06 23:04:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:26,677 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 460 transitions. [2023-11-06 23:04:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 460 transitions. [2023-11-06 23:04:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-06 23:04:26,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:26,679 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:26,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:04:26,887 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:26,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1527182596, now seen corresponding path program 1 times [2023-11-06 23:04:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91466555] [2023-11-06 23:04:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:26,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:26,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50135252] [2023-11-06 23:04:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:26,911 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:26,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:04:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:27,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:04:27,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:27,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 19 [2023-11-06 23:04:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:27,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91466555] [2023-11-06 23:04:27,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50135252] [2023-11-06 23:04:27,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50135252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:27,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:27,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:27,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102583231] [2023-11-06 23:04:27,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:27,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:27,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:27,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:27,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:27,198 INFO L87 Difference]: Start difference. First operand 346 states and 460 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:27,415 INFO L93 Difference]: Finished difference Result 653 states and 871 transitions. [2023-11-06 23:04:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 113 [2023-11-06 23:04:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:27,419 INFO L225 Difference]: With dead ends: 653 [2023-11-06 23:04:27,419 INFO L226 Difference]: Without dead ends: 349 [2023-11-06 23:04:27,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:27,421 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 98 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:27,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 427 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-06 23:04:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2023-11-06 23:04:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 290 states have (on average 1.2724137931034483) internal successors, (369), 293 states have internal predecessors, (369), 44 states have call successors, (44), 11 states have call predecessors, (44), 11 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-06 23:04:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 457 transitions. [2023-11-06 23:04:27,455 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 457 transitions. Word has length 113 [2023-11-06 23:04:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:27,456 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 457 transitions. [2023-11-06 23:04:27,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 457 transitions. [2023-11-06 23:04:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-06 23:04:27,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:27,458 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:27,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:27,665 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:27,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2087726330, now seen corresponding path program 1 times [2023-11-06 23:04:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032453546] [2023-11-06 23:04:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:27,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:27,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184864156] [2023-11-06 23:04:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:27,734 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:27,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:04:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:27,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:04:27,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:28,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:28,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032453546] [2023-11-06 23:04:28,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:28,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184864156] [2023-11-06 23:04:28,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184864156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:28,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:28,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:28,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055667562] [2023-11-06 23:04:28,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:28,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:28,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:28,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:28,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:28,004 INFO L87 Difference]: Start difference. First operand 346 states and 457 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:28,066 INFO L93 Difference]: Finished difference Result 674 states and 889 transitions. [2023-11-06 23:04:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 113 [2023-11-06 23:04:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:28,069 INFO L225 Difference]: With dead ends: 674 [2023-11-06 23:04:28,070 INFO L226 Difference]: Without dead ends: 370 [2023-11-06 23:04:28,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:28,071 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 34 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:28,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 506 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-06 23:04:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 355. [2023-11-06 23:04:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 299 states have (on average 1.2642140468227425) internal successors, (378), 302 states have internal predecessors, (378), 44 states have call successors, (44), 11 states have call predecessors, (44), 11 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-06 23:04:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 466 transitions. [2023-11-06 23:04:28,107 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 466 transitions. Word has length 113 [2023-11-06 23:04:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:28,108 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 466 transitions. [2023-11-06 23:04:28,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 466 transitions. [2023-11-06 23:04:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-06 23:04:28,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:28,110 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:28,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:28,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:28,322 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:28,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1650841692, now seen corresponding path program 1 times [2023-11-06 23:04:28,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:28,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809392809] [2023-11-06 23:04:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:28,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:28,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:28,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284416372] [2023-11-06 23:04:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:28,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:28,349 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:28,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:04:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:28,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:28,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:28,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809392809] [2023-11-06 23:04:28,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284416372] [2023-11-06 23:04:28,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284416372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:28,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:28,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:28,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739288748] [2023-11-06 23:04:28,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:28,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:28,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:28,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:28,590 INFO L87 Difference]: Start difference. First operand 355 states and 466 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:28,652 INFO L93 Difference]: Finished difference Result 852 states and 1134 transitions. [2023-11-06 23:04:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:28,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 113 [2023-11-06 23:04:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:28,657 INFO L225 Difference]: With dead ends: 852 [2023-11-06 23:04:28,657 INFO L226 Difference]: Without dead ends: 539 [2023-11-06 23:04:28,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:28,659 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 131 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:28,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 373 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-11-06 23:04:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 432. [2023-11-06 23:04:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 376 states have (on average 1.303191489361702) internal successors, (490), 379 states have internal predecessors, (490), 44 states have call successors, (44), 11 states have call predecessors, (44), 11 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-06 23:04:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 578 transitions. [2023-11-06 23:04:28,694 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 578 transitions. Word has length 113 [2023-11-06 23:04:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:28,695 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 578 transitions. [2023-11-06 23:04:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 578 transitions. [2023-11-06 23:04:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 23:04:28,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:28,697 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:28,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:28,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 23:04:28,904 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:28,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1257350081, now seen corresponding path program 1 times [2023-11-06 23:04:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176293132] [2023-11-06 23:04:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:28,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885736487] [2023-11-06 23:04:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:28,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:28,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:28,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:04:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:29,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:04:29,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:29,288 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:29,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 20 [2023-11-06 23:04:29,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:04:29,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 55 [2023-11-06 23:04:29,373 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:29,373 INFO L351 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 89 treesize of output 61 [2023-11-06 23:04:29,463 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:29,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 64 [2023-11-06 23:04:29,495 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:29,495 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 82 [2023-11-06 23:04:29,808 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:29,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 48 [2023-11-06 23:04:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:29,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:30,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176293132] [2023-11-06 23:04:30,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885736487] [2023-11-06 23:04:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885736487] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:30,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:30,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 16 [2023-11-06 23:04:30,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729350467] [2023-11-06 23:04:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:04:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:04:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:04:30,371 INFO L87 Difference]: Start difference. First operand 432 states and 578 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:31,823 INFO L93 Difference]: Finished difference Result 1390 states and 1859 transitions. [2023-11-06 23:04:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:04:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 115 [2023-11-06 23:04:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:31,832 INFO L225 Difference]: With dead ends: 1390 [2023-11-06 23:04:31,833 INFO L226 Difference]: Without dead ends: 1000 [2023-11-06 23:04:31,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:04:31,835 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 374 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:31,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1254 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:04:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-11-06 23:04:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 726. [2023-11-06 23:04:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 638 states have (on average 1.2993730407523512) internal successors, (829), 644 states have internal predecessors, (829), 69 states have call successors, (69), 18 states have call predecessors, (69), 18 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 23:04:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 967 transitions. [2023-11-06 23:04:31,900 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 967 transitions. Word has length 115 [2023-11-06 23:04:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:31,900 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 967 transitions. [2023-11-06 23:04:31,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 967 transitions. [2023-11-06 23:04:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 23:04:31,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:31,903 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:31,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 23:04:32,111 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:32,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1757753537, now seen corresponding path program 1 times [2023-11-06 23:04:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470997802] [2023-11-06 23:04:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:32,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:32,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102580030] [2023-11-06 23:04:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:32,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:32,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:32,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:32,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:04:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:32,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:04:32,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:32,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:32,408 INFO L351 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 37 treesize of output 24 [2023-11-06 23:04:32,416 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:32,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2023-11-06 23:04:32,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:32,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 45 [2023-11-06 23:04:32,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:32,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 54 [2023-11-06 23:04:32,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:32,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 18 [2023-11-06 23:04:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:32,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470997802] [2023-11-06 23:04:32,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102580030] [2023-11-06 23:04:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102580030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:32,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:32,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:04:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381471499] [2023-11-06 23:04:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:04:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:04:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:32,581 INFO L87 Difference]: Start difference. First operand 726 states and 967 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:33,314 INFO L93 Difference]: Finished difference Result 1597 states and 2128 transitions. [2023-11-06 23:04:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 115 [2023-11-06 23:04:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:33,321 INFO L225 Difference]: With dead ends: 1597 [2023-11-06 23:04:33,321 INFO L226 Difference]: Without dead ends: 913 [2023-11-06 23:04:33,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:33,324 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 161 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:33,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 887 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:04:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-11-06 23:04:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 708. [2023-11-06 23:04:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 620 states have (on average 1.2983870967741935) internal successors, (805), 626 states have internal predecessors, (805), 69 states have call successors, (69), 18 states have call predecessors, (69), 18 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 23:04:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 943 transitions. [2023-11-06 23:04:33,399 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 943 transitions. Word has length 115 [2023-11-06 23:04:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:33,400 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 943 transitions. [2023-11-06 23:04:33,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 943 transitions. [2023-11-06 23:04:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 23:04:33,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:33,403 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:33,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:33,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 23:04:33,609 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:33,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:33,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1234717827, now seen corresponding path program 1 times [2023-11-06 23:04:33,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:33,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716529738] [2023-11-06 23:04:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:33,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:33,650 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716554039] [2023-11-06 23:04:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:33,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:33,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:33,654 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:33,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:04:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:33,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:04:33,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:33,995 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:33,995 INFO L351 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 37 treesize of output 24 [2023-11-06 23:04:34,005 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:34,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2023-11-06 23:04:34,036 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:34,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 45 [2023-11-06 23:04:34,050 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:34,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 54 [2023-11-06 23:04:34,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:34,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 18 [2023-11-06 23:04:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:34,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716529738] [2023-11-06 23:04:34,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716554039] [2023-11-06 23:04:34,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716554039] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:34,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:34,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:04:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545011112] [2023-11-06 23:04:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:04:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:04:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:34,149 INFO L87 Difference]: Start difference. First operand 708 states and 943 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:34,922 INFO L93 Difference]: Finished difference Result 1661 states and 2200 transitions. [2023-11-06 23:04:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 115 [2023-11-06 23:04:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:34,930 INFO L225 Difference]: With dead ends: 1661 [2023-11-06 23:04:34,930 INFO L226 Difference]: Without dead ends: 995 [2023-11-06 23:04:34,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:34,932 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 242 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:34,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 658 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:04:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-11-06 23:04:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 712. [2023-11-06 23:04:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 623 states have (on average 1.2921348314606742) internal successors, (805), 629 states have internal predecessors, (805), 69 states have call successors, (69), 19 states have call predecessors, (69), 19 states have return successors, (69), 63 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-06 23:04:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 943 transitions. [2023-11-06 23:04:35,017 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 943 transitions. Word has length 115 [2023-11-06 23:04:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:35,017 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 943 transitions. [2023-11-06 23:04:35,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 943 transitions. [2023-11-06 23:04:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 23:04:35,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:35,020 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:35,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:04:35,228 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:35,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1780385791, now seen corresponding path program 1 times [2023-11-06 23:04:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:35,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284654470] [2023-11-06 23:04:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:35,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589269924] [2023-11-06 23:04:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:35,256 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:35,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:04:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:35,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 23:04:35,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:35,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 47 [2023-11-06 23:04:35,573 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:35,573 INFO L351 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 81 treesize of output 53 [2023-11-06 23:04:35,658 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:35,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 56 [2023-11-06 23:04:35,686 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:35,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 65 [2023-11-06 23:04:35,970 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:35,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 38 [2023-11-06 23:04:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:04:36,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:36,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:36,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284654470] [2023-11-06 23:04:36,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:36,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589269924] [2023-11-06 23:04:36,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589269924] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:36,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:04:36,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 16 [2023-11-06 23:04:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473926374] [2023-11-06 23:04:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:36,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:04:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:04:36,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:04:36,410 INFO L87 Difference]: Start difference. First operand 712 states and 943 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:37,589 INFO L93 Difference]: Finished difference Result 1766 states and 2331 transitions. [2023-11-06 23:04:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:04:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 115 [2023-11-06 23:04:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:37,598 INFO L225 Difference]: With dead ends: 1766 [2023-11-06 23:04:37,598 INFO L226 Difference]: Without dead ends: 1100 [2023-11-06 23:04:37,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:04:37,601 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 285 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:37,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1272 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:04:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-11-06 23:04:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 897. [2023-11-06 23:04:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 773 states have (on average 1.274256144890039) internal successors, (985), 782 states have internal predecessors, (985), 96 states have call successors, (96), 27 states have call predecessors, (96), 27 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-06 23:04:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1177 transitions. [2023-11-06 23:04:37,727 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1177 transitions. Word has length 115 [2023-11-06 23:04:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:37,728 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1177 transitions. [2023-11-06 23:04:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1177 transitions. [2023-11-06 23:04:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-06 23:04:37,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:37,731 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:37,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-06 23:04:37,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:04:37,938 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:37,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 789123591, now seen corresponding path program 1 times [2023-11-06 23:04:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:37,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682799683] [2023-11-06 23:04:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:37,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:37,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:37,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845428110] [2023-11-06 23:04:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:37,969 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:37,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:04:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:38,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:04:38,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:38,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:38,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:38,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682799683] [2023-11-06 23:04:38,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:38,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845428110] [2023-11-06 23:04:38,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845428110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:38,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:38,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:38,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222175708] [2023-11-06 23:04:38,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:38,226 INFO L87 Difference]: Start difference. First operand 897 states and 1177 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:38,392 INFO L93 Difference]: Finished difference Result 1874 states and 2434 transitions. [2023-11-06 23:04:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 116 [2023-11-06 23:04:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:38,397 INFO L225 Difference]: With dead ends: 1874 [2023-11-06 23:04:38,398 INFO L226 Difference]: Without dead ends: 1023 [2023-11-06 23:04:38,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:38,400 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 43 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:38,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 637 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2023-11-06 23:04:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 906. [2023-11-06 23:04:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 782 states have (on average 1.2710997442455243) internal successors, (994), 791 states have internal predecessors, (994), 96 states have call successors, (96), 27 states have call predecessors, (96), 27 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-06 23:04:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1186 transitions. [2023-11-06 23:04:38,518 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1186 transitions. Word has length 116 [2023-11-06 23:04:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:38,518 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1186 transitions. [2023-11-06 23:04:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1186 transitions. [2023-11-06 23:04:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-06 23:04:38,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:38,521 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:38,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:38,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:04:38,728 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:38,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1774477534, now seen corresponding path program 1 times [2023-11-06 23:04:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005443348] [2023-11-06 23:04:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:38,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:38,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608005682] [2023-11-06 23:04:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:38,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:38,769 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:38,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:04:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:38,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:38,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:39,255 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:39,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 39 [2023-11-06 23:04:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:39,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005443348] [2023-11-06 23:04:39,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608005682] [2023-11-06 23:04:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608005682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:39,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451032921] [2023-11-06 23:04:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:39,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:39,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:39,312 INFO L87 Difference]: Start difference. First operand 906 states and 1186 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:39,784 INFO L93 Difference]: Finished difference Result 2078 states and 2644 transitions. [2023-11-06 23:04:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 118 [2023-11-06 23:04:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:39,793 INFO L225 Difference]: With dead ends: 2078 [2023-11-06 23:04:39,793 INFO L226 Difference]: Without dead ends: 1218 [2023-11-06 23:04:39,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:39,797 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 38 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:39,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 402 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2023-11-06 23:04:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1029. [2023-11-06 23:04:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 905 states have (on average 1.2408839779005525) internal successors, (1123), 914 states have internal predecessors, (1123), 96 states have call successors, (96), 27 states have call predecessors, (96), 27 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-06 23:04:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1315 transitions. [2023-11-06 23:04:39,961 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1315 transitions. Word has length 118 [2023-11-06 23:04:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:39,961 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1315 transitions. [2023-11-06 23:04:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1315 transitions. [2023-11-06 23:04:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-06 23:04:39,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:39,965 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:39,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:40,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:04:40,173 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:40,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1443339672, now seen corresponding path program 1 times [2023-11-06 23:04:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:40,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804431622] [2023-11-06 23:04:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:40,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200179397] [2023-11-06 23:04:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:40,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:40,202 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:40,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:04:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:40,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:04:40,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:40,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:40,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:40,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804431622] [2023-11-06 23:04:40,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:40,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200179397] [2023-11-06 23:04:40,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200179397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:40,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:40,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:40,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093920167] [2023-11-06 23:04:40,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:40,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:40,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:40,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:40,503 INFO L87 Difference]: Start difference. First operand 1029 states and 1315 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:40,972 INFO L93 Difference]: Finished difference Result 2723 states and 3411 transitions. [2023-11-06 23:04:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 120 [2023-11-06 23:04:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:40,983 INFO L225 Difference]: With dead ends: 2723 [2023-11-06 23:04:40,983 INFO L226 Difference]: Without dead ends: 1740 [2023-11-06 23:04:40,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:40,986 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 93 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:40,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 409 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2023-11-06 23:04:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1182. [2023-11-06 23:04:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1058 states have (on average 1.2400756143667298) internal successors, (1312), 1067 states have internal predecessors, (1312), 96 states have call successors, (96), 27 states have call predecessors, (96), 27 states have return successors, (96), 87 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-06 23:04:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1504 transitions. [2023-11-06 23:04:41,167 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1504 transitions. Word has length 120 [2023-11-06 23:04:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:41,167 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1504 transitions. [2023-11-06 23:04:41,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1504 transitions. [2023-11-06 23:04:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-06 23:04:41,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:41,171 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:41,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-06 23:04:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:04:41,377 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:41,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash -57136278, now seen corresponding path program 1 times [2023-11-06 23:04:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059831244] [2023-11-06 23:04:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:41,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:41,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:41,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678260020] [2023-11-06 23:04:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:41,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:41,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:41,402 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:41,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:04:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:41,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:41,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:41,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:41,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059831244] [2023-11-06 23:04:41,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678260020] [2023-11-06 23:04:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678260020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:41,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945870838] [2023-11-06 23:04:41,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:41,696 INFO L87 Difference]: Start difference. First operand 1182 states and 1504 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:42,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:42,139 INFO L93 Difference]: Finished difference Result 2945 states and 3646 transitions. [2023-11-06 23:04:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:42,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 120 [2023-11-06 23:04:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:42,149 INFO L225 Difference]: With dead ends: 2945 [2023-11-06 23:04:42,149 INFO L226 Difference]: Without dead ends: 1809 [2023-11-06 23:04:42,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:42,151 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 58 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:42,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 471 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2023-11-06 23:04:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1542. [2023-11-06 23:04:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1361 states have (on average 1.1888317413666423) internal successors, (1618), 1376 states have internal predecessors, (1618), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1894 transitions. [2023-11-06 23:04:42,327 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1894 transitions. Word has length 120 [2023-11-06 23:04:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 1542 states and 1894 transitions. [2023-11-06 23:04:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1894 transitions. [2023-11-06 23:04:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-06 23:04:42,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:42,332 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:42,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:42,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:42,538 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:42,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash -532557875, now seen corresponding path program 1 times [2023-11-06 23:04:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:42,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899643662] [2023-11-06 23:04:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:42,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:42,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:42,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531754885] [2023-11-06 23:04:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:42,562 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:42,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:04:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:42,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:04:42,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:42,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-11-06 23:04:42,906 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:42,906 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 28 [2023-11-06 23:04:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:42,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899643662] [2023-11-06 23:04:42,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531754885] [2023-11-06 23:04:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531754885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:42,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 23:04:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936089675] [2023-11-06 23:04:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:42,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:42,948 INFO L87 Difference]: Start difference. First operand 1542 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:43,995 INFO L93 Difference]: Finished difference Result 4417 states and 5333 transitions. [2023-11-06 23:04:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:04:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 121 [2023-11-06 23:04:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:44,008 INFO L225 Difference]: With dead ends: 4417 [2023-11-06 23:04:44,008 INFO L226 Difference]: Without dead ends: 2921 [2023-11-06 23:04:44,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 23:04:44,012 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 279 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:44,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1028 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2023-11-06 23:04:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1815. [2023-11-06 23:04:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1634 states have (on average 1.2086903304773562) internal successors, (1975), 1649 states have internal predecessors, (1975), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2251 transitions. [2023-11-06 23:04:44,248 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2251 transitions. Word has length 121 [2023-11-06 23:04:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:44,248 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2251 transitions. [2023-11-06 23:04:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2251 transitions. [2023-11-06 23:04:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-06 23:04:44,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:44,253 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:44,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:44,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:44,459 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:44,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 621628317, now seen corresponding path program 1 times [2023-11-06 23:04:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292472019] [2023-11-06 23:04:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:44,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:44,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796458954] [2023-11-06 23:04:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:44,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:44,486 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 23:04:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:44,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:44,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:44,759 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:44,760 INFO L351 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 39 treesize of output 26 [2023-11-06 23:04:44,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:44,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2023-11-06 23:04:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:44,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:44,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:44,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292472019] [2023-11-06 23:04:44,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796458954] [2023-11-06 23:04:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796458954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:44,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047125354] [2023-11-06 23:04:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:44,809 INFO L87 Difference]: Start difference. First operand 1815 states and 2251 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:45,374 INFO L93 Difference]: Finished difference Result 4124 states and 5069 transitions. [2023-11-06 23:04:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 124 [2023-11-06 23:04:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:45,389 INFO L225 Difference]: With dead ends: 4124 [2023-11-06 23:04:45,389 INFO L226 Difference]: Without dead ends: 2355 [2023-11-06 23:04:45,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:45,393 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 117 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:45,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 461 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2023-11-06 23:04:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1815. [2023-11-06 23:04:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1634 states have (on average 1.2031823745410037) internal successors, (1966), 1649 states have internal predecessors, (1966), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2242 transitions. [2023-11-06 23:04:45,612 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2242 transitions. Word has length 124 [2023-11-06 23:04:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:45,612 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2242 transitions. [2023-11-06 23:04:45,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2242 transitions. [2023-11-06 23:04:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-06 23:04:45,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:45,617 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:45,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:45,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 23:04:45,825 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:45,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -637027745, now seen corresponding path program 1 times [2023-11-06 23:04:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261010055] [2023-11-06 23:04:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:45,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:45,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516733373] [2023-11-06 23:04:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:45,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:45,858 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:45,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 23:04:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:46,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:46,131 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:46,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2023-11-06 23:04:46,208 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:46,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 15 [2023-11-06 23:04:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:46,222 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:46,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:46,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261010055] [2023-11-06 23:04:46,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:46,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516733373] [2023-11-06 23:04:46,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516733373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:46,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:46,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:46,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583848575] [2023-11-06 23:04:46,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:46,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:46,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:46,224 INFO L87 Difference]: Start difference. First operand 1815 states and 2242 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:46,803 INFO L93 Difference]: Finished difference Result 3893 states and 4738 transitions. [2023-11-06 23:04:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:04:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 125 [2023-11-06 23:04:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:46,816 INFO L225 Difference]: With dead ends: 3893 [2023-11-06 23:04:46,816 INFO L226 Difference]: Without dead ends: 2124 [2023-11-06 23:04:46,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:46,820 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 59 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:46,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 536 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2023-11-06 23:04:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1701. [2023-11-06 23:04:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1520 states have (on average 1.1848684210526317) internal successors, (1801), 1535 states have internal predecessors, (1801), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2077 transitions. [2023-11-06 23:04:47,079 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2077 transitions. Word has length 125 [2023-11-06 23:04:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 2077 transitions. [2023-11-06 23:04:47,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2077 transitions. [2023-11-06 23:04:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-06 23:04:47,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:47,084 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:47,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:47,292 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:47,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1844392401, now seen corresponding path program 1 times [2023-11-06 23:04:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:47,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855852064] [2023-11-06 23:04:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:47,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792172627] [2023-11-06 23:04:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:47,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:47,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:47,316 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:47,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 23:04:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:47,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:04:47,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:47,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2023-11-06 23:04:47,677 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:47,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 28 [2023-11-06 23:04:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:47,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855852064] [2023-11-06 23:04:47,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:47,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792172627] [2023-11-06 23:04:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792172627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:47,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 23:04:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374534531] [2023-11-06 23:04:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:04:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:04:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:47,740 INFO L87 Difference]: Start difference. First operand 1701 states and 2077 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:48,879 INFO L93 Difference]: Finished difference Result 4699 states and 5624 transitions. [2023-11-06 23:04:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 23:04:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 128 [2023-11-06 23:04:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:48,894 INFO L225 Difference]: With dead ends: 4699 [2023-11-06 23:04:48,894 INFO L226 Difference]: Without dead ends: 3044 [2023-11-06 23:04:48,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 23:04:48,898 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 308 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:48,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1221 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2023-11-06 23:04:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1902. [2023-11-06 23:04:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1721 states have (on average 1.1981406159209762) internal successors, (2062), 1736 states have internal predecessors, (2062), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2338 transitions. [2023-11-06 23:04:49,082 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2338 transitions. Word has length 128 [2023-11-06 23:04:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:49,082 INFO L495 AbstractCegarLoop]: Abstraction has 1902 states and 2338 transitions. [2023-11-06 23:04:49,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2338 transitions. [2023-11-06 23:04:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-06 23:04:49,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:49,087 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:49,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-06 23:04:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:49,294 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:49,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2142935349, now seen corresponding path program 1 times [2023-11-06 23:04:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556106408] [2023-11-06 23:04:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:49,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:49,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989318833] [2023-11-06 23:04:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:49,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:49,318 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:49,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 23:04:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:49,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:04:49,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:49,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:49,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 23:04:49,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:04:49,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-06 23:04:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:49,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556106408] [2023-11-06 23:04:49,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989318833] [2023-11-06 23:04:49,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989318833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:49,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:49,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:04:49,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137399025] [2023-11-06 23:04:49,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:49,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:04:49,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:04:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:49,711 INFO L87 Difference]: Start difference. First operand 1902 states and 2338 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:50,162 INFO L93 Difference]: Finished difference Result 4435 states and 5414 transitions. [2023-11-06 23:04:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 130 [2023-11-06 23:04:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:50,175 INFO L225 Difference]: With dead ends: 4435 [2023-11-06 23:04:50,175 INFO L226 Difference]: Without dead ends: 2579 [2023-11-06 23:04:50,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:50,179 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 93 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:50,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 625 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2023-11-06 23:04:50,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2091. [2023-11-06 23:04:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 1910 states have (on average 1.206806282722513) internal successors, (2305), 1925 states have internal predecessors, (2305), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2581 transitions. [2023-11-06 23:04:50,394 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2581 transitions. Word has length 130 [2023-11-06 23:04:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:50,394 INFO L495 AbstractCegarLoop]: Abstraction has 2091 states and 2581 transitions. [2023-11-06 23:04:50,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2581 transitions. [2023-11-06 23:04:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-06 23:04:50,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:50,399 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:50,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:50,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:50,607 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:50,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1473348919, now seen corresponding path program 1 times [2023-11-06 23:04:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:50,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780112128] [2023-11-06 23:04:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:50,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:50,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:50,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445905981] [2023-11-06 23:04:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:50,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:50,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:50,641 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 23:04:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:50,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:04:50,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:50,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:50,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 23:04:51,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2023-11-06 23:04:51,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2023-11-06 23:04:51,026 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:51,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 27 [2023-11-06 23:04:51,202 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:51,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 23 [2023-11-06 23:04:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:51,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:51,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780112128] [2023-11-06 23:04:51,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445905981] [2023-11-06 23:04:51,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445905981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:51,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:51,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 23:04:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375856324] [2023-11-06 23:04:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:51,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:51,231 INFO L87 Difference]: Start difference. First operand 2091 states and 2581 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:51,705 INFO L93 Difference]: Finished difference Result 4846 states and 5972 transitions. [2023-11-06 23:04:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 130 [2023-11-06 23:04:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:51,713 INFO L225 Difference]: With dead ends: 4846 [2023-11-06 23:04:51,713 INFO L226 Difference]: Without dead ends: 2801 [2023-11-06 23:04:51,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:04:51,718 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 135 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:51,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 707 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2023-11-06 23:04:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2313. [2023-11-06 23:04:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2132 states have (on average 1.2204502814258913) internal successors, (2602), 2147 states have internal predecessors, (2602), 138 states have call successors, (138), 42 states have call predecessors, (138), 42 states have return successors, (138), 123 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-06 23:04:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2878 transitions. [2023-11-06 23:04:51,967 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2878 transitions. Word has length 130 [2023-11-06 23:04:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:51,967 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 2878 transitions. [2023-11-06 23:04:51,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2878 transitions. [2023-11-06 23:04:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 23:04:51,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:51,973 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:51,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-06 23:04:52,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 23:04:52,180 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:52,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1498025688, now seen corresponding path program 1 times [2023-11-06 23:04:52,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:52,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504230565] [2023-11-06 23:04:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:52,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:52,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:52,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657637884] [2023-11-06 23:04:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:52,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:52,209 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:52,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 23:04:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:52,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:52,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:52,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-06 23:04:52,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 23:04:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:52,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:52,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504230565] [2023-11-06 23:04:52,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657637884] [2023-11-06 23:04:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657637884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:52,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:52,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315286633] [2023-11-06 23:04:52,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:52,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:52,540 INFO L87 Difference]: Start difference. First operand 2313 states and 2878 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:53,106 INFO L93 Difference]: Finished difference Result 6053 states and 7478 transitions. [2023-11-06 23:04:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 131 [2023-11-06 23:04:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:53,114 INFO L225 Difference]: With dead ends: 6053 [2023-11-06 23:04:53,114 INFO L226 Difference]: Without dead ends: 3786 [2023-11-06 23:04:53,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:53,118 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 153 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:53,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 301 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2023-11-06 23:04:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3462. [2023-11-06 23:04:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3156 states have (on average 1.2024714828897338) internal successors, (3795), 3181 states have internal predecessors, (3795), 235 states have call successors, (235), 70 states have call predecessors, (235), 70 states have return successors, (235), 210 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-06 23:04:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 4265 transitions. [2023-11-06 23:04:53,510 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 4265 transitions. Word has length 131 [2023-11-06 23:04:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:53,510 INFO L495 AbstractCegarLoop]: Abstraction has 3462 states and 4265 transitions. [2023-11-06 23:04:53,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 4265 transitions. [2023-11-06 23:04:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 23:04:53,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:53,517 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:53,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:53,724 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:53,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 802796902, now seen corresponding path program 1 times [2023-11-06 23:04:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615744031] [2023-11-06 23:04:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:53,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:53,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293623229] [2023-11-06 23:04:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:53,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:53,748 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:53,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 23:04:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:54,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:04:54,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:54,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-06 23:04:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:54,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:54,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:54,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615744031] [2023-11-06 23:04:54,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293623229] [2023-11-06 23:04:54,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293623229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:54,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:54,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455227291] [2023-11-06 23:04:54,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:54,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:54,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:54,075 INFO L87 Difference]: Start difference. First operand 3462 states and 4265 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:54,807 INFO L93 Difference]: Finished difference Result 7779 states and 9522 transitions. [2023-11-06 23:04:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:54,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 131 [2023-11-06 23:04:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:54,815 INFO L225 Difference]: With dead ends: 7779 [2023-11-06 23:04:54,816 INFO L226 Difference]: Without dead ends: 4363 [2023-11-06 23:04:54,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:54,820 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 135 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:54,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 586 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:04:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2023-11-06 23:04:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3964. [2023-11-06 23:04:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3600 states have (on average 1.186388888888889) internal successors, (4271), 3629 states have internal predecessors, (4271), 280 states have call successors, (280), 83 states have call predecessors, (280), 83 states have return successors, (280), 251 states have call predecessors, (280), 280 states have call successors, (280) [2023-11-06 23:04:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 4831 transitions. [2023-11-06 23:04:55,187 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 4831 transitions. Word has length 131 [2023-11-06 23:04:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:55,188 INFO L495 AbstractCegarLoop]: Abstraction has 3964 states and 4831 transitions. [2023-11-06 23:04:55,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 4831 transitions. [2023-11-06 23:04:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 23:04:55,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:55,195 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:55,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:55,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:55,401 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:55,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1732039629, now seen corresponding path program 1 times [2023-11-06 23:04:55,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:55,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070086756] [2023-11-06 23:04:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:55,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:55,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323336055] [2023-11-06 23:04:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:55,431 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:55,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 23:04:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:55,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:55,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:55,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2023-11-06 23:04:55,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2023-11-06 23:04:55,771 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:55,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 25 [2023-11-06 23:04:55,922 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:04:55,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 19 [2023-11-06 23:04:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:55,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:55,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:55,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070086756] [2023-11-06 23:04:55,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:55,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323336055] [2023-11-06 23:04:55,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323336055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:55,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:55,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:55,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384805946] [2023-11-06 23:04:55,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:55,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:55,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:55,938 INFO L87 Difference]: Start difference. First operand 3964 states and 4831 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:57,467 INFO L93 Difference]: Finished difference Result 12129 states and 14696 transitions. [2023-11-06 23:04:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:04:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 131 [2023-11-06 23:04:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:57,488 INFO L225 Difference]: With dead ends: 12129 [2023-11-06 23:04:57,488 INFO L226 Difference]: Without dead ends: 8193 [2023-11-06 23:04:57,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:04:57,495 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 264 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:57,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 913 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:04:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2023-11-06 23:04:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 5985. [2023-11-06 23:04:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5985 states, 5380 states have (on average 1.1756505576208178) internal successors, (6325), 5427 states have internal predecessors, (6325), 467 states have call successors, (467), 137 states have call predecessors, (467), 137 states have return successors, (467), 420 states have call predecessors, (467), 467 states have call successors, (467) [2023-11-06 23:04:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5985 states to 5985 states and 7259 transitions. [2023-11-06 23:04:58,246 INFO L78 Accepts]: Start accepts. Automaton has 5985 states and 7259 transitions. Word has length 131 [2023-11-06 23:04:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:58,246 INFO L495 AbstractCegarLoop]: Abstraction has 5985 states and 7259 transitions. [2023-11-06 23:04:58,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5985 states and 7259 transitions. [2023-11-06 23:04:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 23:04:58,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:58,256 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:58,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-06 23:04:58,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 23:04:58,463 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:58,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 209351099, now seen corresponding path program 1 times [2023-11-06 23:04:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:58,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620746188] [2023-11-06 23:04:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:58,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:58,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769418003] [2023-11-06 23:04:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:58,497 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:58,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 23:04:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:58,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:04:58,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:58,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-06 23:04:58,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-11-06 23:04:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:04:58,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:58,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:58,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620746188] [2023-11-06 23:04:58,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:58,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769418003] [2023-11-06 23:04:58,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769418003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:58,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:58,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:58,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526511079] [2023-11-06 23:04:58,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:58,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:04:58,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:04:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:04:58,850 INFO L87 Difference]: Start difference. First operand 5985 states and 7259 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:04:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:59,923 INFO L93 Difference]: Finished difference Result 12387 states and 14959 transitions. [2023-11-06 23:04:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:04:59,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 131 [2023-11-06 23:04:59,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:59,940 INFO L225 Difference]: With dead ends: 12387 [2023-11-06 23:04:59,940 INFO L226 Difference]: Without dead ends: 6448 [2023-11-06 23:04:59,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:59,948 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 131 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:59,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 291 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2023-11-06 23:05:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 4387. [2023-11-06 23:05:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 3898 states have (on average 1.1567470497691124) internal successors, (4509), 3937 states have internal predecessors, (4509), 377 states have call successors, (377), 111 states have call predecessors, (377), 111 states have return successors, (377), 338 states have call predecessors, (377), 377 states have call successors, (377) [2023-11-06 23:05:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 5263 transitions. [2023-11-06 23:05:00,534 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 5263 transitions. Word has length 131 [2023-11-06 23:05:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:00,535 INFO L495 AbstractCegarLoop]: Abstraction has 4387 states and 5263 transitions. [2023-11-06 23:05:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:05:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 5263 transitions. [2023-11-06 23:05:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 23:05:00,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:00,541 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:00,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:00,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 23:05:00,747 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:00,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1385594082, now seen corresponding path program 1 times [2023-11-06 23:05:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:00,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439083260] [2023-11-06 23:05:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:00,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:00,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791958753] [2023-11-06 23:05:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:00,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:00,779 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:00,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 23:05:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:01,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:05:01,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:01,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-06 23:05:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 23:05:01,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:01,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439083260] [2023-11-06 23:05:01,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791958753] [2023-11-06 23:05:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791958753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:01,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:01,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:05:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066421340] [2023-11-06 23:05:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:01,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:01,123 INFO L87 Difference]: Start difference. First operand 4387 states and 5263 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:05:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:02,073 INFO L93 Difference]: Finished difference Result 10829 states and 12990 transitions. [2023-11-06 23:05:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:02,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 132 [2023-11-06 23:05:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:02,092 INFO L225 Difference]: With dead ends: 10829 [2023-11-06 23:05:02,092 INFO L226 Difference]: Without dead ends: 6464 [2023-11-06 23:05:02,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:02,101 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 143 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:02,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 593 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:05:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6464 states. [2023-11-06 23:05:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6464 to 6057. [2023-11-06 23:05:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 5385 states have (on average 1.155803156917363) internal successors, (6224), 5438 states have internal predecessors, (6224), 519 states have call successors, (519), 152 states have call predecessors, (519), 152 states have return successors, (519), 466 states have call predecessors, (519), 519 states have call successors, (519) [2023-11-06 23:05:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 7262 transitions. [2023-11-06 23:05:02,934 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 7262 transitions. Word has length 132 [2023-11-06 23:05:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:02,934 INFO L495 AbstractCegarLoop]: Abstraction has 6057 states and 7262 transitions. [2023-11-06 23:05:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 23:05:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 7262 transitions. [2023-11-06 23:05:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 23:05:02,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:02,941 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:02,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:03,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 23:05:03,145 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:03,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:03,145 INFO L85 PathProgramCache]: Analyzing trace with hash 991227296, now seen corresponding path program 1 times [2023-11-06 23:05:03,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:03,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916400731] [2023-11-06 23:05:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:03,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:03,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:03,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859675300] [2023-11-06 23:05:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:03,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:03,177 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:03,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 23:05:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:03,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:05:03,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:03,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:05:03,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:05:03,581 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:03,581 INFO L351 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 31 treesize of output 33 [2023-11-06 23:05:03,614 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:03,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-06 23:05:03,629 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:03,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 54 [2023-11-06 23:05:03,671 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:05:03,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 29 [2023-11-06 23:05:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-06 23:05:03,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 23:05:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916400731] [2023-11-06 23:05:03,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859675300] [2023-11-06 23:05:03,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859675300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:03,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:03,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2023-11-06 23:05:03,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117261673] [2023-11-06 23:05:03,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:03,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:05:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:05:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:05:03,910 INFO L87 Difference]: Start difference. First operand 6057 states and 7262 transitions. Second operand has 12 states, 10 states have (on average 8.6) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-06 23:05:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:04,895 INFO L93 Difference]: Finished difference Result 7410 states and 8793 transitions. [2023-11-06 23:05:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:05:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 8.6) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 132 [2023-11-06 23:05:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:04,896 INFO L225 Difference]: With dead ends: 7410 [2023-11-06 23:05:04,897 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 23:05:04,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 246 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:05:04,907 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:04,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 220 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 23:05:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 23:05:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 23:05:04,909 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 132 [2023-11-06 23:05:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:04,910 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 23:05:04,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 8.6) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-06 23:05:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 23:05:04,910 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 23:05:04,914 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 23:05:04,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:05,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bbd7a2-6234-4449-aa8a-0a7384bac181/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:05,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-06 23:05:12,913 WARN L293 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 284 DAG size of output: 301 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-06 23:05:20,645 WARN L293 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 284 DAG size of output: 301 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-11-06 23:05:31,098 WARN L293 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 284 DAG size of output: 301 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)