./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep40-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep40-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f09ee736f3dbb8dbc36f75a04671608fd1c3014086677159a28111a32a84bd34 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:24:08,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:24:08,936 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:24:08,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:24:08,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:24:08,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:24:08,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:24:08,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:24:08,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:24:08,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:24:08,973 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:24:08,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:24:08,975 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:24:08,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:24:08,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:24:08,977 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:24:08,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:24:08,978 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:24:08,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:24:08,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:24:08,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:24:08,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:24:08,981 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:24:08,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:24:08,981 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:24:08,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:24:08,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:24:08,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:24:08,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:24:08,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:24:08,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:24:08,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:24:08,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:24:08,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:24:08,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:24:08,986 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:24:08,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:24:08,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:24:08,987 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:24:08,988 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_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09ee736f3dbb8dbc36f75a04671608fd1c3014086677159a28111a32a84bd34 [2023-11-12 02:24:09,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:24:09,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:24:09,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:24:09,274 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:24:09,274 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:24:09,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/reducercommutativity/sep40-1.i [2023-11-12 02:24:12,540 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:24:12,741 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:24:12,742 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/sv-benchmarks/c/reducercommutativity/sep40-1.i [2023-11-12 02:24:12,748 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/data/eb888f31a/8a04f877e8024a98998b41845d18b247/FLAGea5a03213 [2023-11-12 02:24:12,762 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/data/eb888f31a/8a04f877e8024a98998b41845d18b247 [2023-11-12 02:24:12,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:24:12,766 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:24:12,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:24:12,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:24:12,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:24:12,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:24:12" (1/1) ... [2023-11-12 02:24:12,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d86895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:12, skipping insertion in model container [2023-11-12 02:24:12,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:24:12" (1/1) ... [2023-11-12 02:24:12,799 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:24:12,982 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_4f2ff1ce-8419-4624-992e-aed0747a98a7/sv-benchmarks/c/reducercommutativity/sep40-1.i[1293,1306] [2023-11-12 02:24:12,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:24:12,997 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:24:13,039 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_4f2ff1ce-8419-4624-992e-aed0747a98a7/sv-benchmarks/c/reducercommutativity/sep40-1.i[1293,1306] [2023-11-12 02:24:13,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:24:13,057 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:24:13,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13 WrapperNode [2023-11-12 02:24:13,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:24:13,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:24:13,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:24:13,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:24:13,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,086 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,107 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-12 02:24:13,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:24:13,109 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:24:13,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:24:13,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:24:13,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:24:13,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:24:13,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:24:13,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:24:13,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (1/1) ... [2023-11-12 02:24:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:24:13,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:13,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:24:13,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:24:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:24:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:24:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:24:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:24:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:24:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:24:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:24:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:24:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-11-12 02:24:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-11-12 02:24:13,340 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:24:13,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:24:13,638 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:24:13,646 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:24:13,648 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:24:13,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:24:13 BoogieIcfgContainer [2023-11-12 02:24:13,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:24:13,657 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:24:13,657 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:24:13,661 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:24:13,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:24:12" (1/3) ... [2023-11-12 02:24:13,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641394db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:24:13, skipping insertion in model container [2023-11-12 02:24:13,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:24:13" (2/3) ... [2023-11-12 02:24:13,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641394db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:24:13, skipping insertion in model container [2023-11-12 02:24:13,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:24:13" (3/3) ... [2023-11-12 02:24:13,666 INFO L112 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2023-11-12 02:24:13,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:24:13,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:24:13,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:24:13,762 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2224098, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:24:13,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:24:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 02:24:13,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:13,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:13,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:13,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1179968903, now seen corresponding path program 1 times [2023-11-12 02:24:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:13,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651800639] [2023-11-12 02:24:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:13,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:24:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-12 02:24:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:24:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:24:14,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651800639] [2023-11-12 02:24:14,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651800639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:14,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:24:14,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:24:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129045227] [2023-11-12 02:24:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:14,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:14,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:14,174 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:24:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:14,210 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-11-12 02:24:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-12 02:24:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:14,220 INFO L225 Difference]: With dead ends: 54 [2023-11-12 02:24:14,220 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 02:24:14,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:24:14,227 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:14,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:24:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 02:24:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-12 02:24:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-12 02:24:14,264 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 29 [2023-11-12 02:24:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:14,264 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-12 02:24:14,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:24:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-12 02:24:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:24:14,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:14,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:14,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:24:14,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:14,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash 802434324, now seen corresponding path program 1 times [2023-11-12 02:24:14,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:14,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18535418] [2023-11-12 02:24:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:24:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-12 02:24:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-12 02:24:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:24:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18535418] [2023-11-12 02:24:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18535418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937423808] [2023-11-12 02:24:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:14,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:14,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:14,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:24:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:14,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:24:14,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:24:14,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:24:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937423808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:14,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:24:14,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 02:24:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452903472] [2023-11-12 02:24:14,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:14,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:14,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:24:14,684 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:24:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:14,720 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-11-12 02:24:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-12 02:24:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:14,722 INFO L225 Difference]: With dead ends: 46 [2023-11-12 02:24:14,723 INFO L226 Difference]: Without dead ends: 28 [2023-11-12 02:24:14,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:24:14,726 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:14,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:24:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-12 02:24:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-12 02:24:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-12 02:24:14,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 31 [2023-11-12 02:24:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:14,738 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-12 02:24:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:24:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-12 02:24:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:24:14,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:14,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:14,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:14,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:14,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:14,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -621262767, now seen corresponding path program 1 times [2023-11-12 02:24:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:14,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466360611] [2023-11-12 02:24:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:24:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:24:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-12 02:24:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:24:15,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:15,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466360611] [2023-11-12 02:24:15,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466360611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:15,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028863022] [2023-11-12 02:24:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:15,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:15,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:15,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:24:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:24:15,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:24:15,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:24:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028863022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:24:15,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:24:15,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 02:24:15,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858033845] [2023-11-12 02:24:15,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:24:15,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:24:15,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:24:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:24:15,438 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:24:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:15,462 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-12 02:24:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:24:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-12 02:24:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:15,465 INFO L225 Difference]: With dead ends: 42 [2023-11-12 02:24:15,465 INFO L226 Difference]: Without dead ends: 28 [2023-11-12 02:24:15,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:24:15,470 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:15,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:24:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-12 02:24:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-11-12 02:24:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-12 02:24:15,488 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 40 [2023-11-12 02:24:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:15,490 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-12 02:24:15,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:24:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-12 02:24:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 02:24:15,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:15,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:15,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:24:15,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:15,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:15,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash -862308077, now seen corresponding path program 1 times [2023-11-12 02:24:15,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:15,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440109891] [2023-11-12 02:24:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-12 02:24:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:24:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:24:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:24:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440109891] [2023-11-12 02:24:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440109891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086384541] [2023-11-12 02:24:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:15,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:15,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:15,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:24:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:15,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:24:15,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:24:16,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:24:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086384541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:16,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:16,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-12 02:24:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292827326] [2023-11-12 02:24:16,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:16,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:24:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:24:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:24:16,124 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 02:24:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:16,208 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2023-11-12 02:24:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:24:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-11-12 02:24:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:16,210 INFO L225 Difference]: With dead ends: 60 [2023-11-12 02:24:16,210 INFO L226 Difference]: Without dead ends: 38 [2023-11-12 02:24:16,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:24:16,216 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:16,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 137 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:24:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-12 02:24:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-12 02:24:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-12 02:24:16,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 42 [2023-11-12 02:24:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:16,228 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-12 02:24:16,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 02:24:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-12 02:24:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 02:24:16,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:16,234 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:16,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:24:16,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:16,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:16,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1359434988, now seen corresponding path program 2 times [2023-11-12 02:24:16,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415886611] [2023-11-12 02:24:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:16,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:16,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:24:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:24:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:24:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 02:24:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:16,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415886611] [2023-11-12 02:24:16,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415886611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:16,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267966963] [2023-11-12 02:24:16,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:24:16,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:16,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:16,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:24:16,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:24:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:16,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:24:16,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-12 02:24:16,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-12 02:24:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267966963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:16,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-12 02:24:16,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562907328] [2023-11-12 02:24:16,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:24:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:24:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:24:16,975 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:24:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:17,042 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-11-12 02:24:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:24:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2023-11-12 02:24:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:17,043 INFO L225 Difference]: With dead ends: 76 [2023-11-12 02:24:17,043 INFO L226 Difference]: Without dead ends: 51 [2023-11-12 02:24:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:24:17,045 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:17,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 133 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-12 02:24:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-11-12 02:24:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-12 02:24:17,052 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 57 [2023-11-12 02:24:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:17,053 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-12 02:24:17,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:24:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-12 02:24:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 02:24:17,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:17,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:17,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:17,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:17,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1790168738, now seen corresponding path program 3 times [2023-11-12 02:24:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:17,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91223341] [2023-11-12 02:24:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:24:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:17,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-12 02:24:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:17,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-12 02:24:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-12 02:24:17,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91223341] [2023-11-12 02:24:17,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91223341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001193545] [2023-11-12 02:24:17,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:24:17,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:17,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:24:17,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:24:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:17,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:24:17,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-12 02:24:17,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-12 02:24:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001193545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:17,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:17,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-12 02:24:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460029797] [2023-11-12 02:24:17,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:24:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:24:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:24:17,976 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:18,080 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2023-11-12 02:24:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:24:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2023-11-12 02:24:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:18,085 INFO L225 Difference]: With dead ends: 92 [2023-11-12 02:24:18,086 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:24:18,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:24:18,090 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:18,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 181 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:24:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-12 02:24:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2023-11-12 02:24:18,106 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 71 [2023-11-12 02:24:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:18,106 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2023-11-12 02:24:18,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2023-11-12 02:24:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 02:24:18,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:18,114 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:18,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:18,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:18,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1401367388, now seen corresponding path program 4 times [2023-11-12 02:24:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:18,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145916202] [2023-11-12 02:24:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:24:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:18,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-12 02:24:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:18,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-12 02:24:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-11-12 02:24:18,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:18,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145916202] [2023-11-12 02:24:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145916202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:18,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390480389] [2023-11-12 02:24:18,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:24:18,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:18,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:18,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:18,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:24:19,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:24:19,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:19,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:24:19,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-11-12 02:24:19,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-11-12 02:24:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390480389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:19,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:19,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-12 02:24:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904817947] [2023-11-12 02:24:19,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:19,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:24:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:24:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:24:19,537 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 02:24:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:19,651 INFO L93 Difference]: Finished difference Result 129 states and 161 transitions. [2023-11-12 02:24:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:24:19,652 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 109 [2023-11-12 02:24:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:19,653 INFO L225 Difference]: With dead ends: 129 [2023-11-12 02:24:19,653 INFO L226 Difference]: Without dead ends: 90 [2023-11-12 02:24:19,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:24:19,657 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:19,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-12 02:24:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-12 02:24:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-11-12 02:24:19,683 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 109 [2023-11-12 02:24:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:19,683 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-11-12 02:24:19,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 02:24:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-11-12 02:24:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 02:24:19,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:19,685 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:19,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:19,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:19,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:19,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -814365822, now seen corresponding path program 5 times [2023-11-12 02:24:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:19,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561510820] [2023-11-12 02:24:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:19,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:21,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:24:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:21,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-12 02:24:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-12 02:24:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-11-12 02:24:21,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:21,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561510820] [2023-11-12 02:24:21,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561510820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:21,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235652407] [2023-11-12 02:24:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:24:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:21,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:21,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:24:25,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-12 02:24:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:25,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:24:25,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2023-11-12 02:24:26,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2023-11-12 02:24:26,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235652407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:26,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:26,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2023-11-12 02:24:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053466015] [2023-11-12 02:24:26,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:26,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-12 02:24:26,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-12 02:24:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:24:26,323 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:26,504 INFO L93 Difference]: Finished difference Result 156 states and 195 transitions. [2023-11-12 02:24:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-12 02:24:26,505 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 135 [2023-11-12 02:24:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:26,508 INFO L225 Difference]: With dead ends: 156 [2023-11-12 02:24:26,508 INFO L226 Difference]: Without dead ends: 117 [2023-11-12 02:24:26,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:24:26,513 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:26,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 217 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-12 02:24:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-11-12 02:24:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2023-11-12 02:24:26,529 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 135 [2023-11-12 02:24:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:26,530 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2023-11-12 02:24:26,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2023-11-12 02:24:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-12 02:24:26,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:26,533 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:26,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:24:26,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:26,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -932565312, now seen corresponding path program 6 times [2023-11-12 02:24:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729855561] [2023-11-12 02:24:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:28,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:24:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:28,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-11-12 02:24:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:28,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-11-12 02:24:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2023-11-12 02:24:28,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:28,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729855561] [2023-11-12 02:24:28,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729855561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419423951] [2023-11-12 02:24:28,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:24:28,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:28,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:28,694 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:28,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:24:28,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-12 02:24:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:28,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:24:28,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2023-11-12 02:24:29,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2023-11-12 02:24:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419423951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:29,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2023-11-12 02:24:29,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251247582] [2023-11-12 02:24:29,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:29,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-12 02:24:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-12 02:24:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 02:24:29,134 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:29,287 INFO L93 Difference]: Finished difference Result 190 states and 230 transitions. [2023-11-12 02:24:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 02:24:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 209 [2023-11-12 02:24:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:29,291 INFO L225 Difference]: With dead ends: 190 [2023-11-12 02:24:29,291 INFO L226 Difference]: Without dead ends: 127 [2023-11-12 02:24:29,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 02:24:29,295 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:29,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 156 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-12 02:24:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2023-11-12 02:24:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.140495867768595) internal successors, (138), 121 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2023-11-12 02:24:29,313 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 209 [2023-11-12 02:24:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:29,313 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2023-11-12 02:24:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2023-11-12 02:24:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-12 02:24:29,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:29,319 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:29,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:29,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:29,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:29,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:29,527 INFO L85 PathProgramCache]: Analyzing trace with hash 626900214, now seen corresponding path program 7 times [2023-11-12 02:24:29,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:29,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029325198] [2023-11-12 02:24:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:29,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-12 02:24:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:31,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-12 02:24:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-11-12 02:24:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-11-12 02:24:31,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:31,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029325198] [2023-11-12 02:24:31,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029325198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:31,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139234181] [2023-11-12 02:24:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:24:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:31,227 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:31,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:24:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:31,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:24:31,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-11-12 02:24:31,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-11-12 02:24:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139234181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:32,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 43 [2023-11-12 02:24:32,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232462003] [2023-11-12 02:24:32,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:32,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-12 02:24:32,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:32,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-12 02:24:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 02:24:32,496 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 02:24:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:32,662 INFO L93 Difference]: Finished difference Result 225 states and 274 transitions. [2023-11-12 02:24:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-12 02:24:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 219 [2023-11-12 02:24:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:32,664 INFO L225 Difference]: With dead ends: 225 [2023-11-12 02:24:32,664 INFO L226 Difference]: Without dead ends: 154 [2023-11-12 02:24:32,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 416 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 02:24:32,666 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:32,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 219 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-12 02:24:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-11-12 02:24:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 149 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2023-11-12 02:24:32,675 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 219 [2023-11-12 02:24:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:32,675 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2023-11-12 02:24:32,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 43 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 02:24:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2023-11-12 02:24:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-12 02:24:32,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:32,679 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 40, 40, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:32,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:32,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:24:32,886 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:32,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash 873712346, now seen corresponding path program 8 times [2023-11-12 02:24:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:32,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999360705] [2023-11-12 02:24:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-12 02:24:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:33,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-11-12 02:24:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:33,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2023-11-12 02:24:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 2833 trivial. 0 not checked. [2023-11-12 02:24:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:33,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999360705] [2023-11-12 02:24:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999360705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787474607] [2023-11-12 02:24:33,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:24:33,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:33,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:33,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:33,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:24:34,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:24:34,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:34,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:24:34,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 2837 trivial. 0 not checked. [2023-11-12 02:24:34,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 2833 trivial. 0 not checked. [2023-11-12 02:24:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787474607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:34,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-11-12 02:24:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540702803] [2023-11-12 02:24:34,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:34,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:24:34,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:24:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:24:34,925 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:24:35,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:35,057 INFO L93 Difference]: Finished difference Result 271 states and 340 transitions. [2023-11-12 02:24:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 02:24:35,058 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 247 [2023-11-12 02:24:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:35,063 INFO L225 Difference]: With dead ends: 271 [2023-11-12 02:24:35,063 INFO L226 Difference]: Without dead ends: 202 [2023-11-12 02:24:35,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:24:35,065 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:35,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 217 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-12 02:24:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-12 02:24:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 236 transitions. [2023-11-12 02:24:35,076 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 236 transitions. Word has length 247 [2023-11-12 02:24:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:35,076 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 236 transitions. [2023-11-12 02:24:35,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:24:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 236 transitions. [2023-11-12 02:24:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-12 02:24:35,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:35,084 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 90, 40, 40, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:35,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-12 02:24:35,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:35,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:35,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash -868441126, now seen corresponding path program 9 times [2023-11-12 02:24:35,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:35,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224858695] [2023-11-12 02:24:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:35,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-12 02:24:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:38,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-11-12 02:24:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2023-11-12 02:24:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13936 backedges. 0 proven. 6863 refuted. 0 times theorem prover too weak. 7073 trivial. 0 not checked. [2023-11-12 02:24:38,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:38,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224858695] [2023-11-12 02:24:38,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224858695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:38,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267829386] [2023-11-12 02:24:38,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:24:38,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:38,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:38,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:24:39,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-12 02:24:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:39,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:24:39,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13936 backedges. 5530 proven. 36 refuted. 0 times theorem prover too weak. 8370 trivial. 0 not checked. [2023-11-12 02:24:39,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13936 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13900 trivial. 0 not checked. [2023-11-12 02:24:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267829386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:39,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:39,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2023-11-12 02:24:39,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916895169] [2023-11-12 02:24:39,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:39,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-12 02:24:39,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-12 02:24:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:24:39,583 INFO L87 Difference]: Start difference. First operand 202 states and 236 transitions. Second operand has 47 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 states have internal predecessors, (150), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:39,742 INFO L93 Difference]: Finished difference Result 340 states and 420 transitions. [2023-11-12 02:24:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-12 02:24:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 states have internal predecessors, (150), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 391 [2023-11-12 02:24:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:39,745 INFO L225 Difference]: With dead ends: 340 [2023-11-12 02:24:39,745 INFO L226 Difference]: Without dead ends: 223 [2023-11-12 02:24:39,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2023-11-12 02:24:39,748 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:39,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 169 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-12 02:24:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-11-12 02:24:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.1574074074074074) internal successors, (250), 216 states have internal predecessors, (250), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 256 transitions. [2023-11-12 02:24:39,761 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 256 transitions. Word has length 391 [2023-11-12 02:24:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:39,762 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 256 transitions. [2023-11-12 02:24:39,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.1914893617021276) internal successors, (150), 47 states have internal predecessors, (150), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:24:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 256 transitions. [2023-11-12 02:24:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2023-11-12 02:24:39,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:39,770 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:39,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:39,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:24:39,977 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:39,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -706606757, now seen corresponding path program 10 times [2023-11-12 02:24:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:39,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33579624] [2023-11-12 02:24:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-12 02:24:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:42,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2023-11-12 02:24:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:42,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2023-11-12 02:24:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14924 backedges. 0 proven. 7324 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2023-11-12 02:24:43,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33579624] [2023-11-12 02:24:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33579624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723568033] [2023-11-12 02:24:43,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:24:43,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:43,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:43,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:24:43,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:24:43,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:24:43,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 02:24:43,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:24:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14924 backedges. 5894 proven. 1426 refuted. 0 times theorem prover too weak. 7604 trivial. 0 not checked. [2023-11-12 02:24:43,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:24:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14924 backedges. 0 proven. 7324 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2023-11-12 02:24:44,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723568033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:24:44,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:24:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2023-11-12 02:24:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854244726] [2023-11-12 02:24:44,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:24:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-12 02:24:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:24:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-12 02:24:44,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 02:24:44,882 INFO L87 Difference]: Start difference. First operand 221 states and 256 transitions. Second operand has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 states have internal predecessors, (150), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:24:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:24:45,052 INFO L93 Difference]: Finished difference Result 384 states and 473 transitions. [2023-11-12 02:24:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-12 02:24:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 states have internal predecessors, (150), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 416 [2023-11-12 02:24:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:24:45,055 INFO L225 Difference]: With dead ends: 384 [2023-11-12 02:24:45,056 INFO L226 Difference]: Without dead ends: 248 [2023-11-12 02:24:45,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 806 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 02:24:45,058 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:24:45,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 193 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:24:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-12 02:24:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-11-12 02:24:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.176954732510288) internal successors, (286), 243 states have internal predecessors, (286), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:24:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2023-11-12 02:24:45,070 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 416 [2023-11-12 02:24:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:24:45,071 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2023-11-12 02:24:45,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5714285714285716) internal successors, (150), 42 states have internal predecessors, (150), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:24:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2023-11-12 02:24:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-12 02:24:45,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:24:45,082 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 120, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:24:45,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:24:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:45,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:24:45,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:24:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1691079018, now seen corresponding path program 11 times [2023-11-12 02:24:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:24:45,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745077561] [2023-11-12 02:24:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:24:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:24:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:46,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-12 02:24:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:46,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2023-11-12 02:24:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:46,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2023-11-12 02:24:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:24:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 23591 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2023-11-12 02:24:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:24:46,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745077561] [2023-11-12 02:24:46,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745077561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:24:46,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777286714] [2023-11-12 02:24:46,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:24:46,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:24:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:24:46,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:24:46,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f2ff1ce-8419-4624-992e-aed0747a98a7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process