./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-56.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_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/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_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-56.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/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_86c55af6-6106-436a-a76c-66d9b2f68008/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 9d9e482375fcd558b315d6d7125c6d1058f6054bc52b6693ff996c0cb6bda49c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:26,779 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:26,905 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:26,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:26,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:26,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:26,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:26,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:26,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:26,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:26,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:26,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:26,977 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:26,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:26,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:26,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:26,981 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:26,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:26,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:26,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:26,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:26,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:26,985 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:26,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:26,986 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:26,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:26,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:26,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:26,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:26,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:26,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:26,992 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:26,992 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:26,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:26,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:26,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:26,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:26,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:26,994 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:26,995 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_86c55af6-6106-436a-a76c-66d9b2f68008/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d9e482375fcd558b315d6d7125c6d1058f6054bc52b6693ff996c0cb6bda49c [2023-11-06 21:53:27,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:27,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:27,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:27,424 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:27,424 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:27,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-56.i [2023-11-06 21:53:30,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:31,125 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:31,126 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-56.i [2023-11-06 21:53:31,145 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/data/27e2d29c7/13408e00de0c43d083ce7f49362c56c9/FLAGf368c1e32 [2023-11-06 21:53:31,177 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/data/27e2d29c7/13408e00de0c43d083ce7f49362c56c9 [2023-11-06 21:53:31,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:31,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:31,183 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:31,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:31,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:31,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:31,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14657b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31, skipping insertion in model container [2023-11-06 21:53:31,192 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:31,264 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:31,444 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_86c55af6-6106-436a-a76c-66d9b2f68008/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-56.i[916,929] [2023-11-06 21:53:31,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:31,693 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:31,706 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_86c55af6-6106-436a-a76c-66d9b2f68008/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-56.i[916,929] [2023-11-06 21:53:31,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:31,888 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:31,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31 WrapperNode [2023-11-06 21:53:31,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:31,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:31,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:31,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:31,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:31,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,059 INFO L138 Inliner]: procedures = 26, calls = 142, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 984 [2023-11-06 21:53:32,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:32,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:32,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:32,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:32,071 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,234 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:32,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:32,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:32,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:32,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (1/1) ... [2023-11-06 21:53:32,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:32,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:32,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:32,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:53:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:53:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:32,520 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:32,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:34,168 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:34,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:34,187 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:53:34,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:34 BoogieIcfgContainer [2023-11-06 21:53:34,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:34,197 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:34,197 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:34,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:34,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:31" (1/3) ... [2023-11-06 21:53:34,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c95d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:34, skipping insertion in model container [2023-11-06 21:53:34,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:31" (2/3) ... [2023-11-06 21:53:34,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c95d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:34, skipping insertion in model container [2023-11-06 21:53:34,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:34" (3/3) ... [2023-11-06 21:53:34,205 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-56.i [2023-11-06 21:53:34,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:34,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:34,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:34,324 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;@5114b4e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:34,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:53:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 372 states, 240 states have (on average 1.625) internal successors, (390), 241 states have internal predecessors, (390), 129 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-06 21:53:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:53:34,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:34,399 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:34,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:34,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -7323314, now seen corresponding path program 1 times [2023-11-06 21:53:34,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:34,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535904167] [2023-11-06 21:53:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:35,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:35,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535904167] [2023-11-06 21:53:35,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:53:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576303929] [2023-11-06 21:53:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:35,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:35,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:35,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:35,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:53:35,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 32768 trivial. 0 not checked. [2023-11-06 21:53:36,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:36,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576303929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:36,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:36,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:53:36,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059659957] [2023-11-06 21:53:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:36,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:53:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:53:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:53:36,233 INFO L87 Difference]: Start difference. First operand has 372 states, 240 states have (on average 1.625) internal successors, (390), 241 states have internal predecessors, (390), 129 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (129), 2 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-06 21:53:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:36,355 INFO L93 Difference]: Finished difference Result 737 states and 1419 transitions. [2023-11-06 21:53:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:53:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (129), 2 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 2 states have call successors, (129) Word has length 809 [2023-11-06 21:53:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:36,378 INFO L225 Difference]: With dead ends: 737 [2023-11-06 21:53:36,378 INFO L226 Difference]: Without dead ends: 368 [2023-11-06 21:53:36,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 808 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 21:53:36,395 INFO L413 NwaCegarLoop]: 640 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, 640 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 21:53:36,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-06 21:53:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2023-11-06 21:53:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 237 states have (on average 1.6118143459915613) internal successors, (382), 237 states have internal predecessors, (382), 129 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-06 21:53:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 640 transitions. [2023-11-06 21:53:36,558 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 640 transitions. Word has length 809 [2023-11-06 21:53:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:36,559 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 640 transitions. [2023-11-06 21:53:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (129), 2 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-06 21:53:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 640 transitions. [2023-11-06 21:53:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:53:36,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:36,593 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:36,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:53:36,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:36,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1113223128, now seen corresponding path program 1 times [2023-11-06 21:53:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240185975] [2023-11-06 21:53:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:37,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:37,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007089234] [2023-11-06 21:53:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:37,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:37,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:37,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:53:37,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:53:38,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:38,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240185975] [2023-11-06 21:53:38,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007089234] [2023-11-06 21:53:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007089234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:38,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028292702] [2023-11-06 21:53:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:38,046 INFO L87 Difference]: Start difference. First operand 368 states and 640 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:38,547 INFO L93 Difference]: Finished difference Result 1135 states and 1996 transitions. [2023-11-06 21:53:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 809 [2023-11-06 21:53:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:38,574 INFO L225 Difference]: With dead ends: 1135 [2023-11-06 21:53:38,574 INFO L226 Difference]: Without dead ends: 770 [2023-11-06 21:53:38,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:38,582 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 878 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:38,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 1717 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:53:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-11-06 21:53:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 585. [2023-11-06 21:53:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 415 states have (on average 1.6698795180722892) internal successors, (693), 416 states have internal predecessors, (693), 167 states have call successors, (167), 2 states have call predecessors, (167), 2 states have return successors, (167), 166 states have call predecessors, (167), 167 states have call successors, (167) [2023-11-06 21:53:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1027 transitions. [2023-11-06 21:53:38,763 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1027 transitions. Word has length 809 [2023-11-06 21:53:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:38,775 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 1027 transitions. [2023-11-06 21:53:38,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1027 transitions. [2023-11-06 21:53:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:53:38,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:38,795 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:38,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 21:53:39,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:39,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash -777545337, now seen corresponding path program 1 times [2023-11-06 21:53:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59872959] [2023-11-06 21:53:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368931982] [2023-11-06 21:53:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:39,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:39,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:53:39,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:53:40,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:40,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:40,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59872959] [2023-11-06 21:53:40,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:40,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368931982] [2023-11-06 21:53:40,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368931982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:40,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:40,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:40,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899864167] [2023-11-06 21:53:40,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:40,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:40,069 INFO L87 Difference]: Start difference. First operand 585 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:40,576 INFO L93 Difference]: Finished difference Result 1588 states and 2779 transitions. [2023-11-06 21:53:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:40,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 810 [2023-11-06 21:53:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:40,589 INFO L225 Difference]: With dead ends: 1588 [2023-11-06 21:53:40,589 INFO L226 Difference]: Without dead ends: 1006 [2023-11-06 21:53:40,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 808 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 21:53:40,594 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 1204 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:40,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 2252 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:53:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2023-11-06 21:53:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 815. [2023-11-06 21:53:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 623 states have (on average 1.7142857142857142) internal successors, (1068), 624 states have internal predecessors, (1068), 187 states have call successors, (187), 4 states have call predecessors, (187), 4 states have return successors, (187), 186 states have call predecessors, (187), 187 states have call successors, (187) [2023-11-06 21:53:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1442 transitions. [2023-11-06 21:53:40,689 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1442 transitions. Word has length 810 [2023-11-06 21:53:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:40,691 INFO L495 AbstractCegarLoop]: Abstraction has 815 states and 1442 transitions. [2023-11-06 21:53:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1442 transitions. [2023-11-06 21:53:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:53:40,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:40,705 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:40,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:40,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:40,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:40,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash -659755637, now seen corresponding path program 1 times [2023-11-06 21:53:40,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745304956] [2023-11-06 21:53:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:41,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:41,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186327446] [2023-11-06 21:53:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:41,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:41,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:53:41,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:53:41,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:41,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:41,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745304956] [2023-11-06 21:53:41,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186327446] [2023-11-06 21:53:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186327446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:41,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152784625] [2023-11-06 21:53:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:41,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:41,976 INFO L87 Difference]: Start difference. First operand 815 states and 1442 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:42,507 INFO L93 Difference]: Finished difference Result 2280 states and 4034 transitions. [2023-11-06 21:53:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 810 [2023-11-06 21:53:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:42,524 INFO L225 Difference]: With dead ends: 2280 [2023-11-06 21:53:42,524 INFO L226 Difference]: Without dead ends: 1468 [2023-11-06 21:53:42,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 808 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 21:53:42,530 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 1183 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:42,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 2578 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:53:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2023-11-06 21:53:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1459. [2023-11-06 21:53:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1140 states have (on average 1.7131578947368422) internal successors, (1953), 1143 states have internal predecessors, (1953), 310 states have call successors, (310), 8 states have call predecessors, (310), 8 states have return successors, (310), 307 states have call predecessors, (310), 310 states have call successors, (310) [2023-11-06 21:53:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2573 transitions. [2023-11-06 21:53:42,673 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2573 transitions. Word has length 810 [2023-11-06 21:53:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:42,675 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 2573 transitions. [2023-11-06 21:53:42,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2573 transitions. [2023-11-06 21:53:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:53:42,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:42,691 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:42,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:42,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:42,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:42,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1503761139, now seen corresponding path program 1 times [2023-11-06 21:53:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785778209] [2023-11-06 21:53:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:42,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:43,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:43,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015770592] [2023-11-06 21:53:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:43,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:43,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:43,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:53:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:43,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:53:43,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 14960 proven. 0 refuted. 0 times theorem prover too weak. 18064 trivial. 0 not checked. [2023-11-06 21:53:46,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785778209] [2023-11-06 21:53:46,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015770592] [2023-11-06 21:53:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015770592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:46,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:46,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928078731] [2023-11-06 21:53:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:46,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:46,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:46,672 INFO L87 Difference]: Start difference. First operand 1459 states and 2573 transitions. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-06 21:53:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:46,961 INFO L93 Difference]: Finished difference Result 4371 states and 7713 transitions. [2023-11-06 21:53:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) Word has length 810 [2023-11-06 21:53:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:46,990 INFO L225 Difference]: With dead ends: 4371 [2023-11-06 21:53:46,990 INFO L226 Difference]: Without dead ends: 2915 [2023-11-06 21:53:46,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:46,998 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 391 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:46,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1868 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2023-11-06 21:53:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2913. [2023-11-06 21:53:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2276 states have (on average 1.710896309314587) internal successors, (3894), 2282 states have internal predecessors, (3894), 620 states have call successors, (620), 16 states have call predecessors, (620), 16 states have return successors, (620), 614 states have call predecessors, (620), 620 states have call successors, (620) [2023-11-06 21:53:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 5134 transitions. [2023-11-06 21:53:47,410 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 5134 transitions. Word has length 810 [2023-11-06 21:53:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:47,412 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 5134 transitions. [2023-11-06 21:53:47,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-06 21:53:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 5134 transitions. [2023-11-06 21:53:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:53:47,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:47,428 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:47,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 21:53:47,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:47,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:47,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1105026319, now seen corresponding path program 1 times [2023-11-06 21:53:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:47,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277458234] [2023-11-06 21:53:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:47,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783384158] [2023-11-06 21:53:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:47,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:47,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:47,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:53:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:53:48,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:53:48,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:48,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277458234] [2023-11-06 21:53:48,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783384158] [2023-11-06 21:53:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783384158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:48,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:48,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796648937] [2023-11-06 21:53:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:48,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:48,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:48,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:48,631 INFO L87 Difference]: Start difference. First operand 2913 states and 5134 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:49,144 INFO L93 Difference]: Finished difference Result 7401 states and 13082 transitions. [2023-11-06 21:53:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 810 [2023-11-06 21:53:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:49,185 INFO L225 Difference]: With dead ends: 7401 [2023-11-06 21:53:49,186 INFO L226 Difference]: Without dead ends: 4491 [2023-11-06 21:53:49,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:49,198 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 233 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:49,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1512 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2023-11-06 21:53:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4481. [2023-11-06 21:53:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 3628 states have (on average 1.7282249173098125) internal successors, (6270), 3642 states have internal predecessors, (6270), 828 states have call successors, (828), 24 states have call predecessors, (828), 24 states have return successors, (828), 814 states have call predecessors, (828), 828 states have call successors, (828) [2023-11-06 21:53:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 7926 transitions. [2023-11-06 21:53:49,732 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 7926 transitions. Word has length 810 [2023-11-06 21:53:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:49,734 INFO L495 AbstractCegarLoop]: Abstraction has 4481 states and 7926 transitions. [2023-11-06 21:53:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 7926 transitions. [2023-11-06 21:53:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:53:49,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:49,752 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:49,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 21:53:49,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:49,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:49,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1741210097, now seen corresponding path program 1 times [2023-11-06 21:53:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059608033] [2023-11-06 21:53:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:50,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:50,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076737517] [2023-11-06 21:53:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:50,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:50,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:50,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:53:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:50,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:53:50,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059608033] [2023-11-06 21:53:50,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:50,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076737517] [2023-11-06 21:53:50,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076737517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:50,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:50,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:50,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065065386] [2023-11-06 21:53:50,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:50,887 INFO L87 Difference]: Start difference. First operand 4481 states and 7926 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:51,391 INFO L93 Difference]: Finished difference Result 11223 states and 19524 transitions. [2023-11-06 21:53:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 810 [2023-11-06 21:53:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:51,456 INFO L225 Difference]: With dead ends: 11223 [2023-11-06 21:53:51,457 INFO L226 Difference]: Without dead ends: 6745 [2023-11-06 21:53:51,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:51,476 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 372 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:51,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1581 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2023-11-06 21:53:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6741. [2023-11-06 21:53:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6741 states, 5052 states have (on average 1.6401425178147269) internal successors, (8286), 5082 states have internal predecessors, (8286), 1640 states have call successors, (1640), 48 states have call predecessors, (1640), 48 states have return successors, (1640), 1610 states have call predecessors, (1640), 1640 states have call successors, (1640) [2023-11-06 21:53:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6741 states to 6741 states and 11566 transitions. [2023-11-06 21:53:52,418 INFO L78 Accepts]: Start accepts. Automaton has 6741 states and 11566 transitions. Word has length 810 [2023-11-06 21:53:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:52,420 INFO L495 AbstractCegarLoop]: Abstraction has 6741 states and 11566 transitions. [2023-11-06 21:53:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:53:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6741 states and 11566 transitions. [2023-11-06 21:53:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:53:52,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:52,452 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:52,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:52,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:52,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:52,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1287515283, now seen corresponding path program 1 times [2023-11-06 21:53:52,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142026418] [2023-11-06 21:53:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:52,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316885320] [2023-11-06 21:53:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:52,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:52,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:53:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:53,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 15518 proven. 141 refuted. 0 times theorem prover too weak. 17365 trivial. 0 not checked. [2023-11-06 21:53:54,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 243 proven. 141 refuted. 0 times theorem prover too weak. 32640 trivial. 0 not checked. [2023-11-06 21:53:55,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142026418] [2023-11-06 21:53:55,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:55,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316885320] [2023-11-06 21:53:55,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316885320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:55,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:53:55,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 21:53:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051021545] [2023-11-06 21:53:55,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:53:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:53:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:53:55,193 INFO L87 Difference]: Start difference. First operand 6741 states and 11566 transitions. Second operand has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 3 states have call successors, (176), 2 states have call predecessors, (176), 4 states have return successors, (177), 3 states have call predecessors, (177), 3 states have call successors, (177) [2023-11-06 21:53:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:56,871 INFO L93 Difference]: Finished difference Result 13591 states and 23237 transitions. [2023-11-06 21:53:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:53:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 3 states have call successors, (176), 2 states have call predecessors, (176), 4 states have return successors, (177), 3 states have call predecessors, (177), 3 states have call successors, (177) Word has length 810 [2023-11-06 21:53:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:56,947 INFO L225 Difference]: With dead ends: 13591 [2023-11-06 21:53:56,949 INFO L226 Difference]: Without dead ends: 6853 [2023-11-06 21:53:56,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1622 GetRequests, 1612 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:53:56,987 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 707 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:56,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 1238 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:53:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6853 states. [2023-11-06 21:53:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6853 to 6757. [2023-11-06 21:53:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 5064 states have (on average 1.6259873617693523) internal successors, (8234), 5094 states have internal predecessors, (8234), 1640 states have call successors, (1640), 52 states have call predecessors, (1640), 52 states have return successors, (1640), 1610 states have call predecessors, (1640), 1640 states have call successors, (1640) [2023-11-06 21:53:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 11514 transitions. [2023-11-06 21:53:57,942 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 11514 transitions. Word has length 810 [2023-11-06 21:53:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:57,944 INFO L495 AbstractCegarLoop]: Abstraction has 6757 states and 11514 transitions. [2023-11-06 21:53:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.375) internal successors, (243), 8 states have internal predecessors, (243), 3 states have call successors, (176), 2 states have call predecessors, (176), 4 states have return successors, (177), 3 states have call predecessors, (177), 3 states have call successors, (177) [2023-11-06 21:53:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 11514 transitions. [2023-11-06 21:53:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2023-11-06 21:53:57,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:57,966 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:53:57,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 21:53:58,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:58,178 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:58,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1970478332, now seen corresponding path program 1 times [2023-11-06 21:53:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:58,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869093525] [2023-11-06 21:53:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:58,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:58,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420830320] [2023-11-06 21:53:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:58,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:58,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:58,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:53:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:59,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:59,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 10320 proven. 72 refuted. 0 times theorem prover too weak. 22632 trivial. 0 not checked. [2023-11-06 21:53:59,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 312 proven. 72 refuted. 0 times theorem prover too weak. 32640 trivial. 0 not checked. [2023-11-06 21:54:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:00,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869093525] [2023-11-06 21:54:00,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:00,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420830320] [2023-11-06 21:54:00,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420830320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:00,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16603466] [2023-11-06 21:54:00,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:00,318 INFO L87 Difference]: Start difference. First operand 6757 states and 11514 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) [2023-11-06 21:54:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:02,430 INFO L93 Difference]: Finished difference Result 13631 states and 23141 transitions. [2023-11-06 21:54:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:02,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) Word has length 811 [2023-11-06 21:54:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:02,463 INFO L225 Difference]: With dead ends: 13631 [2023-11-06 21:54:02,463 INFO L226 Difference]: Without dead ends: 6877 [2023-11-06 21:54:02,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1624 GetRequests, 1614 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:02,491 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 988 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:02,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 1240 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 21:54:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6877 states. [2023-11-06 21:54:03,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6877 to 6773. [2023-11-06 21:54:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6773 states, 5076 states have (on average 1.6055949566587864) internal successors, (8150), 5106 states have internal predecessors, (8150), 1640 states have call successors, (1640), 56 states have call predecessors, (1640), 56 states have return successors, (1640), 1610 states have call predecessors, (1640), 1640 states have call successors, (1640) [2023-11-06 21:54:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 11430 transitions. [2023-11-06 21:54:03,372 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 11430 transitions. Word has length 811 [2023-11-06 21:54:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:03,374 INFO L495 AbstractCegarLoop]: Abstraction has 6773 states and 11430 transitions. [2023-11-06 21:54:03,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) [2023-11-06 21:54:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 11430 transitions. [2023-11-06 21:54:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2023-11-06 21:54:03,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:03,397 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:03,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:03,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:54:03,614 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:03,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash 815396472, now seen corresponding path program 1 times [2023-11-06 21:54:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:03,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553461079] [2023-11-06 21:54:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:03,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:03,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430041895] [2023-11-06 21:54:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:03,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:03,745 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:03,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:54:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:04,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:04,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 9668 proven. 66 refuted. 0 times theorem prover too weak. 23290 trivial. 0 not checked. [2023-11-06 21:54:05,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 318 proven. 66 refuted. 0 times theorem prover too weak. 32640 trivial. 0 not checked. [2023-11-06 21:54:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:05,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553461079] [2023-11-06 21:54:05,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:05,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430041895] [2023-11-06 21:54:05,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430041895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:05,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:05,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:05,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025740986] [2023-11-06 21:54:05,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:05,772 INFO L87 Difference]: Start difference. First operand 6773 states and 11430 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (152), 2 states have call predecessors, (152), 2 states have call successors, (152) [2023-11-06 21:54:07,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:07,501 INFO L93 Difference]: Finished difference Result 13671 states and 22981 transitions. [2023-11-06 21:54:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:07,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (152), 2 states have call predecessors, (152), 2 states have call successors, (152) Word has length 811 [2023-11-06 21:54:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:07,532 INFO L225 Difference]: With dead ends: 13671 [2023-11-06 21:54:07,532 INFO L226 Difference]: Without dead ends: 6901 [2023-11-06 21:54:07,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1624 GetRequests, 1614 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:07,557 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 684 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:07,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 1240 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:54:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2023-11-06 21:54:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 6789. [2023-11-06 21:54:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6789 states, 5088 states have (on average 1.5978773584905661) internal successors, (8130), 5118 states have internal predecessors, (8130), 1640 states have call successors, (1640), 60 states have call predecessors, (1640), 60 states have return successors, (1640), 1610 states have call predecessors, (1640), 1640 states have call successors, (1640) [2023-11-06 21:54:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6789 states to 6789 states and 11410 transitions. [2023-11-06 21:54:08,486 INFO L78 Accepts]: Start accepts. Automaton has 6789 states and 11410 transitions. Word has length 811 [2023-11-06 21:54:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:08,487 INFO L495 AbstractCegarLoop]: Abstraction has 6789 states and 11410 transitions. [2023-11-06 21:54:08,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (152), 2 states have call predecessors, (152), 2 states have call successors, (152) [2023-11-06 21:54:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 6789 states and 11410 transitions. [2023-11-06 21:54:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2023-11-06 21:54:08,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:08,507 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:08,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:08,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:54:08,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:08,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -772951430, now seen corresponding path program 1 times [2023-11-06 21:54:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877194034] [2023-11-06 21:54:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:08,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:08,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652619095] [2023-11-06 21:54:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:08,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:08,932 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:08,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:54:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:09,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:54:09,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:54:11,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:11,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:11,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877194034] [2023-11-06 21:54:11,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652619095] [2023-11-06 21:54:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652619095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:11,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:11,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495573539] [2023-11-06 21:54:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:11,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:11,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:11,389 INFO L87 Difference]: Start difference. First operand 6789 states and 11410 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:54:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:12,789 INFO L93 Difference]: Finished difference Result 17001 states and 28589 transitions. [2023-11-06 21:54:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 811 [2023-11-06 21:54:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:12,840 INFO L225 Difference]: With dead ends: 17001 [2023-11-06 21:54:12,840 INFO L226 Difference]: Without dead ends: 10215 [2023-11-06 21:54:12,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:12,862 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 245 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:12,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1630 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:54:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10215 states. [2023-11-06 21:54:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10215 to 10213. [2023-11-06 21:54:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10213 states, 7662 states have (on average 1.5960584703732708) internal successors, (12229), 7707 states have internal predecessors, (12229), 2460 states have call successors, (2460), 90 states have call predecessors, (2460), 90 states have return successors, (2460), 2415 states have call predecessors, (2460), 2460 states have call successors, (2460) [2023-11-06 21:54:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10213 states to 10213 states and 17149 transitions. [2023-11-06 21:54:14,251 INFO L78 Accepts]: Start accepts. Automaton has 10213 states and 17149 transitions. Word has length 811 [2023-11-06 21:54:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:14,253 INFO L495 AbstractCegarLoop]: Abstraction has 10213 states and 17149 transitions. [2023-11-06 21:54:14,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:54:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10213 states and 17149 transitions. [2023-11-06 21:54:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2023-11-06 21:54:14,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:14,278 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:14,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:14,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:54:14,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:14,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash -113419908, now seen corresponding path program 1 times [2023-11-06 21:54:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:14,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783095427] [2023-11-06 21:54:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:14,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:14,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331567950] [2023-11-06 21:54:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:14,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:14,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:14,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:14,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:54:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:15,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:54:15,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:15,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783095427] [2023-11-06 21:54:15,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:15,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331567950] [2023-11-06 21:54:15,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331567950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:15,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204165403] [2023-11-06 21:54:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:15,620 INFO L87 Difference]: Start difference. First operand 10213 states and 17149 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:54:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:16,920 INFO L93 Difference]: Finished difference Result 25025 states and 42218 transitions. [2023-11-06 21:54:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 811 [2023-11-06 21:54:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:16,985 INFO L225 Difference]: With dead ends: 25025 [2023-11-06 21:54:16,985 INFO L226 Difference]: Without dead ends: 14815 [2023-11-06 21:54:17,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:17,012 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 345 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:17,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1610 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:54:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14815 states. [2023-11-06 21:54:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14815 to 11497. [2023-11-06 21:54:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11497 states, 8946 states have (on average 1.6313436172591103) internal successors, (14594), 8991 states have internal predecessors, (14594), 2460 states have call successors, (2460), 90 states have call predecessors, (2460), 90 states have return successors, (2460), 2415 states have call predecessors, (2460), 2460 states have call successors, (2460) [2023-11-06 21:54:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11497 states to 11497 states and 19514 transitions. [2023-11-06 21:54:18,453 INFO L78 Accepts]: Start accepts. Automaton has 11497 states and 19514 transitions. Word has length 811 [2023-11-06 21:54:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:18,458 INFO L495 AbstractCegarLoop]: Abstraction has 11497 states and 19514 transitions. [2023-11-06 21:54:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:54:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 11497 states and 19514 transitions. [2023-11-06 21:54:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-06 21:54:18,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:18,479 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:18,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:18,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:18,691 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:18,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 754675452, now seen corresponding path program 1 times [2023-11-06 21:54:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117213020] [2023-11-06 21:54:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:18,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:18,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:18,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072065600] [2023-11-06 21:54:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:18,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:18,832 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:18,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:54:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:19,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:54:19,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:54:19,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:19,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117213020] [2023-11-06 21:54:19,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:19,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072065600] [2023-11-06 21:54:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072065600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:19,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:19,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:19,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338307040] [2023-11-06 21:54:19,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:19,849 INFO L87 Difference]: Start difference. First operand 11497 states and 19514 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:54:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:21,306 INFO L93 Difference]: Finished difference Result 23113 states and 39122 transitions. [2023-11-06 21:54:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 812 [2023-11-06 21:54:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:21,363 INFO L225 Difference]: With dead ends: 23113 [2023-11-06 21:54:21,364 INFO L226 Difference]: Without dead ends: 11619 [2023-11-06 21:54:21,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:21,393 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 327 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:21,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1520 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:54:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11619 states. [2023-11-06 21:54:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11619 to 7941. [2023-11-06 21:54:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 6014 states have (on average 1.6139008979048886) internal successors, (9706), 6035 states have internal predecessors, (9706), 1836 states have call successors, (1836), 90 states have call predecessors, (1836), 90 states have return successors, (1836), 1815 states have call predecessors, (1836), 1836 states have call successors, (1836) [2023-11-06 21:54:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 13378 transitions. [2023-11-06 21:54:22,816 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 13378 transitions. Word has length 812 [2023-11-06 21:54:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:22,818 INFO L495 AbstractCegarLoop]: Abstraction has 7941 states and 13378 transitions. [2023-11-06 21:54:22,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:54:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 13378 transitions. [2023-11-06 21:54:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-06 21:54:22,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:22,835 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:22,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:23,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:54:23,047 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:23,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1720375034, now seen corresponding path program 1 times [2023-11-06 21:54:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523903771] [2023-11-06 21:54:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:23,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:23,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8852644] [2023-11-06 21:54:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:23,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:23,180 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:23,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:54:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:24,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:54:24,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 13670 proven. 273 refuted. 0 times theorem prover too weak. 19081 trivial. 0 not checked. [2023-11-06 21:54:27,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 111 proven. 273 refuted. 0 times theorem prover too weak. 32640 trivial. 0 not checked. [2023-11-06 21:54:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523903771] [2023-11-06 21:54:28,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8852644] [2023-11-06 21:54:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8852644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:28,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:28,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2023-11-06 21:54:28,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145492265] [2023-11-06 21:54:28,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:28,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:54:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:54:28,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:54:28,980 INFO L87 Difference]: Start difference. First operand 7941 states and 13378 transitions. Second operand has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 4 states have call successors, (258), 3 states have call predecessors, (258), 5 states have return successors, (258), 4 states have call predecessors, (258), 4 states have call successors, (258) [2023-11-06 21:54:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:35,538 INFO L93 Difference]: Finished difference Result 24219 states and 40287 transitions. [2023-11-06 21:54:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 21:54:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 4 states have call successors, (258), 3 states have call predecessors, (258), 5 states have return successors, (258), 4 states have call predecessors, (258), 4 states have call successors, (258) Word has length 812 [2023-11-06 21:54:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:35,612 INFO L225 Difference]: With dead ends: 24219 [2023-11-06 21:54:35,613 INFO L226 Difference]: Without dead ends: 16083 [2023-11-06 21:54:35,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1617 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 21:54:35,636 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 6360 mSDsluCounter, 3509 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 1207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6599 SdHoareTripleChecker+Valid, 4518 SdHoareTripleChecker+Invalid, 3427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1207 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:35,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6599 Valid, 4518 Invalid, 3427 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1207 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 21:54:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16083 states. [2023-11-06 21:54:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16083 to 10773. [2023-11-06 21:54:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10773 states, 8230 states have (on average 1.6121506682867557) internal successors, (13268), 8267 states have internal predecessors, (13268), 2412 states have call successors, (2412), 130 states have call predecessors, (2412), 130 states have return successors, (2412), 2375 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-11-06 21:54:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10773 states to 10773 states and 18092 transitions. [2023-11-06 21:54:37,470 INFO L78 Accepts]: Start accepts. Automaton has 10773 states and 18092 transitions. Word has length 812 [2023-11-06 21:54:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:37,472 INFO L495 AbstractCegarLoop]: Abstraction has 10773 states and 18092 transitions. [2023-11-06 21:54:37,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.53846153846154) internal successors, (267), 13 states have internal predecessors, (267), 4 states have call successors, (258), 3 states have call predecessors, (258), 5 states have return successors, (258), 4 states have call predecessors, (258), 4 states have call successors, (258) [2023-11-06 21:54:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 10773 states and 18092 transitions. [2023-11-06 21:54:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-06 21:54:37,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:37,499 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:37,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:37,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:54:37,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:37,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:37,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1249736068, now seen corresponding path program 1 times [2023-11-06 21:54:37,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:37,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819091274] [2023-11-06 21:54:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:37,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:37,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254527272] [2023-11-06 21:54:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:37,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:37,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:37,852 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:37,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:54:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:39,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:54:39,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 13670 proven. 273 refuted. 0 times theorem prover too weak. 19081 trivial. 0 not checked. [2023-11-06 21:54:40,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 111 proven. 273 refuted. 0 times theorem prover too weak. 32640 trivial. 0 not checked. [2023-11-06 21:54:41,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819091274] [2023-11-06 21:54:41,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254527272] [2023-11-06 21:54:41,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254527272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:41,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 21:54:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002002511] [2023-11-06 21:54:41,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:54:41,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:54:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:54:41,479 INFO L87 Difference]: Start difference. First operand 10773 states and 18092 transitions. Second operand has 12 states, 12 states have (on average 22.333333333333332) internal successors, (268), 12 states have internal predecessors, (268), 3 states have call successors, (220), 2 states have call predecessors, (220), 4 states have return successors, (221), 3 states have call predecessors, (221), 3 states have call successors, (221) [2023-11-06 21:54:45,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 21:54:47,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 21:54:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:59,352 INFO L93 Difference]: Finished difference Result 74570 states and 122924 transitions. [2023-11-06 21:54:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 21:54:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 22.333333333333332) internal successors, (268), 12 states have internal predecessors, (268), 3 states have call successors, (220), 2 states have call predecessors, (220), 4 states have return successors, (221), 3 states have call predecessors, (221), 3 states have call successors, (221) Word has length 812 [2023-11-06 21:54:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:59,554 INFO L225 Difference]: With dead ends: 74570 [2023-11-06 21:54:59,554 INFO L226 Difference]: Without dead ends: 63800 [2023-11-06 21:54:59,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1618 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=803, Invalid=2737, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:54:59,642 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 3116 mSDsluCounter, 3182 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 1017 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3160 SdHoareTripleChecker+Valid, 3902 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:59,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3160 Valid, 3902 Invalid, 2994 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1017 Valid, 1975 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2023-11-06 21:54:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63800 states. [2023-11-06 21:55:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63800 to 16846. [2023-11-06 21:55:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16846 states, 13455 states have (on average 1.6442214790040877) internal successors, (22123), 13500 states have internal predecessors, (22123), 3180 states have call successors, (3180), 210 states have call predecessors, (3180), 210 states have return successors, (3180), 3135 states have call predecessors, (3180), 3180 states have call successors, (3180) [2023-11-06 21:55:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16846 states to 16846 states and 28483 transitions. [2023-11-06 21:55:03,118 INFO L78 Accepts]: Start accepts. Automaton has 16846 states and 28483 transitions. Word has length 812 [2023-11-06 21:55:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:03,120 INFO L495 AbstractCegarLoop]: Abstraction has 16846 states and 28483 transitions. [2023-11-06 21:55:03,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.333333333333332) internal successors, (268), 12 states have internal predecessors, (268), 3 states have call successors, (220), 2 states have call predecessors, (220), 4 states have return successors, (221), 3 states have call predecessors, (221), 3 states have call successors, (221) [2023-11-06 21:55:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16846 states and 28483 transitions. [2023-11-06 21:55:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-06 21:55:03,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:03,144 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:03,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:03,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:55:03,357 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:03,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash 109965497, now seen corresponding path program 1 times [2023-11-06 21:55:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:03,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807636146] [2023-11-06 21:55:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:03,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:03,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:03,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551339092] [2023-11-06 21:55:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:03,464 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:03,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:55:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:04,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:55:04,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 21740 proven. 591 refuted. 0 times theorem prover too weak. 10693 trivial. 0 not checked. [2023-11-06 21:55:11,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807636146] [2023-11-06 21:55:15,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551339092] [2023-11-06 21:55:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551339092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:15,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:55:15,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-06 21:55:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600309886] [2023-11-06 21:55:15,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:15,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:55:15,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:55:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:55:15,426 INFO L87 Difference]: Start difference. First operand 16846 states and 28483 transitions. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 6 states have call successors, (129), 6 states have call predecessors, (129), 7 states have return successors, (129), 4 states have call predecessors, (129), 6 states have call successors, (129) [2023-11-06 21:55:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:31,390 INFO L93 Difference]: Finished difference Result 51258 states and 85375 transitions. [2023-11-06 21:55:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 21:55:31,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 6 states have call successors, (129), 6 states have call predecessors, (129), 7 states have return successors, (129), 4 states have call predecessors, (129), 6 states have call successors, (129) Word has length 812 [2023-11-06 21:55:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:31,447 INFO L225 Difference]: With dead ends: 51258 [2023-11-06 21:55:31,447 INFO L226 Difference]: Without dead ends: 34415 [2023-11-06 21:55:31,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1225 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=882, Invalid=2658, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:55:31,476 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 1967 mSDsluCounter, 3528 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 4221 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:31,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 4221 Invalid, 3618 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [772 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-06 21:55:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34415 states. [2023-11-06 21:55:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34415 to 26654. [2023-11-06 21:55:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26654 states, 21451 states have (on average 1.6278961353783041) internal successors, (34920), 21520 states have internal predecessors, (34920), 4704 states have call successors, (4704), 498 states have call predecessors, (4704), 498 states have return successors, (4704), 4635 states have call predecessors, (4704), 4704 states have call successors, (4704) [2023-11-06 21:55:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26654 states to 26654 states and 44328 transitions. [2023-11-06 21:55:35,995 INFO L78 Accepts]: Start accepts. Automaton has 26654 states and 44328 transitions. Word has length 812 [2023-11-06 21:55:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:35,996 INFO L495 AbstractCegarLoop]: Abstraction has 26654 states and 44328 transitions. [2023-11-06 21:55:35,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 6 states have call successors, (129), 6 states have call predecessors, (129), 7 states have return successors, (129), 4 states have call predecessors, (129), 6 states have call successors, (129) [2023-11-06 21:55:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 26654 states and 44328 transitions. [2023-11-06 21:55:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-06 21:55:36,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:36,025 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:36,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 21:55:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:55:36,226 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:36,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1009496322, now seen corresponding path program 1 times [2023-11-06 21:55:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006203644] [2023-11-06 21:55:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:36,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:36,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350167222] [2023-11-06 21:55:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:36,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:36,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:36,316 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:36,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:55:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:37,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:55:37,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33024 trivial. 0 not checked. [2023-11-06 21:55:38,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006203644] [2023-11-06 21:55:38,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350167222] [2023-11-06 21:55:38,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350167222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:38,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:38,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:38,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333429949] [2023-11-06 21:55:38,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:38,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:55:38,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:55:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:38,698 INFO L87 Difference]: Start difference. First operand 26654 states and 44328 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:55:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:51,782 INFO L93 Difference]: Finished difference Result 84053 states and 139112 transitions. [2023-11-06 21:55:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:55:51,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) Word has length 812 [2023-11-06 21:55:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:51,908 INFO L225 Difference]: With dead ends: 84053 [2023-11-06 21:55:51,908 INFO L226 Difference]: Without dead ends: 57402 [2023-11-06 21:55:51,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 809 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 21:55:51,949 INFO L413 NwaCegarLoop]: 1011 mSDtfsCounter, 966 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 2664 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:51,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 2664 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:55:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57402 states. [2023-11-06 21:55:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57402 to 37086. [2023-11-06 21:55:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37086 states, 29760 states have (on average 1.6263440860215055) internal successors, (48400), 29851 states have internal predecessors, (48400), 6613 states have call successors, (6613), 712 states have call predecessors, (6613), 712 states have return successors, (6613), 6522 states have call predecessors, (6613), 6613 states have call successors, (6613) [2023-11-06 21:56:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37086 states to 37086 states and 61626 transitions. [2023-11-06 21:56:00,099 INFO L78 Accepts]: Start accepts. Automaton has 37086 states and 61626 transitions. Word has length 812 [2023-11-06 21:56:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:00,100 INFO L495 AbstractCegarLoop]: Abstraction has 37086 states and 61626 transitions. [2023-11-06 21:56:00,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (129), 1 states have call predecessors, (129), 1 states have return successors, (129), 1 states have call predecessors, (129), 1 states have call successors, (129) [2023-11-06 21:56:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 37086 states and 61626 transitions. [2023-11-06 21:56:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 813 [2023-11-06 21:56:00,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:00,123 INFO L195 NwaCegarLoop]: trace histogram [129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:00,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:00,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:56:00,324 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:00,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash 350205243, now seen corresponding path program 1 times [2023-11-06 21:56:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84543384] [2023-11-06 21:56:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:00,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:00,442 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:00,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414710152] [2023-11-06 21:56:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:00,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:00,445 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:00,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86c55af6-6106-436a-a76c-66d9b2f68008/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:56:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:01,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:56:01,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 17235 proven. 240 refuted. 0 times theorem prover too weak. 15549 trivial. 0 not checked. [2023-11-06 21:56:05,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 33024 backedges. 522 proven. 243 refuted. 0 times theorem prover too weak. 32259 trivial. 0 not checked. [2023-11-06 21:56:08,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:08,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84543384] [2023-11-06 21:56:08,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:08,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414710152] [2023-11-06 21:56:08,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414710152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:08,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:08,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 21:56:08,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795282553] [2023-11-06 21:56:08,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:08,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:56:08,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:56:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:56:08,257 INFO L87 Difference]: Start difference. First operand 37086 states and 61626 transitions. Second operand has 18 states, 17 states have (on average 20.235294117647058) internal successors, (344), 18 states have internal predecessors, (344), 8 states have call successors, (258), 5 states have call predecessors, (258), 8 states have return successors, (258), 6 states have call predecessors, (258), 8 states have call successors, (258)