./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/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_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/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_40ef8e17-c40c-4f39-9413-503ed942eb93/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 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:25:24,582 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:25:24,672 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:25:24,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:25:24,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:25:24,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:25:24,710 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:25:24,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:25:24,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:25:24,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:25:24,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:25:24,713 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:25:24,714 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:25:24,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:25:24,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:25:24,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:25:24,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:25:24,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:25:24,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:25:24,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:25:24,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:25:24,721 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:25:24,721 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:25:24,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:25:24,728 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:25:24,728 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:25:24,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:25:24,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:25:24,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:25:24,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:25:24,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:25:24,741 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:25:24,741 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:25:24,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:25:24,742 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:25:24,742 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:25:24,742 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:25:24,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:25:24,743 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:25:24,743 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_40ef8e17-c40c-4f39-9413-503ed942eb93/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 783ac259376d0d4b331b84c9ee3bd0ed2042af56d21e98db70a8bebb07aee3c2 [2023-11-12 02:25:24,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:25:25,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:25:25,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:25:25,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:25:25,024 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:25:25,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2023-11-12 02:25:28,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:25:28,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:25:28,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i [2023-11-12 02:25:28,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/data/331480655/9afa8b7913fc465f98f631242b0a8413/FLAG04bf15006 [2023-11-12 02:25:28,501 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/data/331480655/9afa8b7913fc465f98f631242b0a8413 [2023-11-12 02:25:28,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:25:28,510 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:25:28,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:28,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:25:28,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:25:28,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365b51a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28, skipping insertion in model container [2023-11-12 02:25:28,524 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,552 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:25:28,736 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_40ef8e17-c40c-4f39-9413-503ed942eb93/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2023-11-12 02:25:28,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:28,773 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:25:28,789 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_40ef8e17-c40c-4f39-9413-503ed942eb93/sv-benchmarks/c/array-industry-pattern/array_single_elem_init.i[815,828] [2023-11-12 02:25:28,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:25:28,834 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:25:28,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28 WrapperNode [2023-11-12 02:25:28,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:25:28,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:28,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:25:28,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:25:28,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,851 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,873 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-12 02:25:28,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:25:28,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:25:28,875 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:25:28,875 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:25:28,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:25:28,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:25:28,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:25:28,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:25:28,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (1/1) ... [2023-11-12 02:25:28,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:25:28,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:28,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:25:28,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:25:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:25:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:25:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:25:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:25:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:25:28,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:25:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:25:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:25:29,049 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:25:29,051 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:25:29,235 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:25:29,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:25:29,241 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:25:29,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:29 BoogieIcfgContainer [2023-11-12 02:25:29,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:25:29,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:25:29,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:25:29,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:25:29,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:25:28" (1/3) ... [2023-11-12 02:25:29,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cdab60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:25:29, skipping insertion in model container [2023-11-12 02:25:29,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:25:28" (2/3) ... [2023-11-12 02:25:29,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cdab60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:25:29, skipping insertion in model container [2023-11-12 02:25:29,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:25:29" (3/3) ... [2023-11-12 02:25:29,255 INFO L112 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2023-11-12 02:25:29,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:25:29,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:25:29,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:25:29,334 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;@386b89ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:25:29,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:25:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:25:29,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:29,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:29,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:29,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2023-11-12 02:25:29,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:29,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167142911] [2023-11-12 02:25:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:29,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167142911] [2023-11-12 02:25:29,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167142911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:29,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:29,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:25:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048067506] [2023-11-12 02:25:29,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:25:29,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:25:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:25:29,644 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:29,662 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-11-12 02:25:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:25:29,664 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 02:25:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:29,672 INFO L225 Difference]: With dead ends: 32 [2023-11-12 02:25:29,672 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 02:25:29,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:25:29,682 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:29,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:25:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 02:25:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 02:25:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-11-12 02:25:29,717 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2023-11-12 02:25:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:29,718 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-11-12 02:25:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-11-12 02:25:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:25:29,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:29,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:29,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:25:29,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:29,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2023-11-12 02:25:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:29,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263180091] [2023-11-12 02:25:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:25:29,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263180091] [2023-11-12 02:25:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263180091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:25:29,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:25:29,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:25:29,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465525072] [2023-11-12 02:25:29,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:25:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:25:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:25:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:25:29,858 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:29,911 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-11-12 02:25:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:25:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 02:25:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:29,912 INFO L225 Difference]: With dead ends: 33 [2023-11-12 02:25:29,913 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 02:25:29,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 02:25:29,915 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:29,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:25:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 02:25:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-11-12 02:25:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-12 02:25:29,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2023-11-12 02:25:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:29,928 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-12 02:25:29,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-12 02:25:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:25:29,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:29,929 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:25:29,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:29,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2023-11-12 02:25:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:29,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619473571] [2023-11-12 02:25:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:25:30,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:30,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619473571] [2023-11-12 02:25:30,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619473571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:30,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2459856] [2023-11-12 02:25:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:30,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:30,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:25:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:30,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:25:30,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:25:30,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:25:30,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2459856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:30,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:30,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 02:25:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052020562] [2023-11-12 02:25:30,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:30,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:25:30,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:25:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:25:30,432 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:30,575 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2023-11-12 02:25:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:25:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 02:25:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:30,581 INFO L225 Difference]: With dead ends: 55 [2023-11-12 02:25:30,581 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 02:25:30,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:25:30,592 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:30,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:25:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 02:25:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2023-11-12 02:25:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2023-11-12 02:25:30,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 16 [2023-11-12 02:25:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:30,609 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2023-11-12 02:25:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2023-11-12 02:25:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:25:30,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:30,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:30,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:30,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 310337378, now seen corresponding path program 2 times [2023-11-12 02:25:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499423533] [2023-11-12 02:25:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 02:25:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499423533] [2023-11-12 02:25:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499423533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:31,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609806572] [2023-11-12 02:25:31,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:25:31,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:31,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:25:31,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:31,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:31,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:25:31,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:25:31,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:25:31,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609806572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:31,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:31,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2023-11-12 02:25:31,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478861630] [2023-11-12 02:25:31,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:31,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:25:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:25:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:25:31,505 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:31,775 INFO L93 Difference]: Finished difference Result 112 states and 158 transitions. [2023-11-12 02:25:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:25:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-12 02:25:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:31,781 INFO L225 Difference]: With dead ends: 112 [2023-11-12 02:25:31,781 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 02:25:31,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:25:31,784 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 242 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:31,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 37 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:25:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 02:25:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2023-11-12 02:25:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 84 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2023-11-12 02:25:31,811 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 34 [2023-11-12 02:25:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:31,812 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2023-11-12 02:25:31,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2023-11-12 02:25:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-12 02:25:31,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:31,818 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:31,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:32,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:32,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash -708297260, now seen corresponding path program 3 times [2023-11-12 02:25:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172668171] [2023-11-12 02:25:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-12 02:25:32,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:32,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172668171] [2023-11-12 02:25:32,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172668171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:32,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714493047] [2023-11-12 02:25:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:25:32,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:32,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:25:32,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:25:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:32,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:25:32,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:32,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 02:25:32,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-11-12 02:25:32,718 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:25:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-11-12 02:25:32,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:32,798 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:25:32,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-11-12 02:25:32,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2023-11-12 02:25:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-11-12 02:25:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714493047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:32,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:32,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-11-12 02:25:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510443354] [2023-11-12 02:25:32,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:25:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:25:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:25:32,936 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:33,517 INFO L93 Difference]: Finished difference Result 207 states and 289 transitions. [2023-11-12 02:25:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:25:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-12 02:25:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:33,523 INFO L225 Difference]: With dead ends: 207 [2023-11-12 02:25:33,523 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 02:25:33,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 02:25:33,526 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 260 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:33,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 48 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:25:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 02:25:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2023-11-12 02:25:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.308411214953271) internal successors, (140), 107 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2023-11-12 02:25:33,544 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 73 [2023-11-12 02:25:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:33,545 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2023-11-12 02:25:33,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2023-11-12 02:25:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 02:25:33,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:33,547 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:33,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:33,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:33,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:33,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash -422151838, now seen corresponding path program 1 times [2023-11-12 02:25:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:33,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733990272] [2023-11-12 02:25:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:25:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:34,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733990272] [2023-11-12 02:25:34,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733990272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:34,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070146731] [2023-11-12 02:25:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:34,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:34,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:25:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:34,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:25:34,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:25:34,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-12 02:25:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070146731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:34,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-12 02:25:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153778381] [2023-11-12 02:25:34,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:34,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:25:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:34,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:25:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:25:34,622 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:35,087 INFO L93 Difference]: Finished difference Result 276 states and 372 transitions. [2023-11-12 02:25:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:25:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-12 02:25:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:35,089 INFO L225 Difference]: With dead ends: 276 [2023-11-12 02:25:35,090 INFO L226 Difference]: Without dead ends: 251 [2023-11-12 02:25:35,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:25:35,091 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 399 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:35,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 66 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:25:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-12 02:25:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 219. [2023-11-12 02:25:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.31651376146789) internal successors, (287), 218 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 287 transitions. [2023-11-12 02:25:35,109 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 287 transitions. Word has length 76 [2023-11-12 02:25:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:35,109 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 287 transitions. [2023-11-12 02:25:35,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 287 transitions. [2023-11-12 02:25:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-12 02:25:35,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:35,113 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:35,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:35,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 5109204, now seen corresponding path program 2 times [2023-11-12 02:25:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596370458] [2023-11-12 02:25:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-12 02:25:36,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:36,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596370458] [2023-11-12 02:25:36,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596370458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:36,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658286806] [2023-11-12 02:25:36,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:25:36,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:36,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:36,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:36,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:25:36,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:25:36,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:36,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:25:36,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-12 02:25:36,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-12 02:25:37,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658286806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:37,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:37,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-12 02:25:37,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600120813] [2023-11-12 02:25:37,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:37,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-12 02:25:37,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-12 02:25:37,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 02:25:37,875 INFO L87 Difference]: Start difference. First operand 219 states and 287 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:39,008 INFO L93 Difference]: Finished difference Result 555 states and 754 transitions. [2023-11-12 02:25:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 02:25:39,009 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-12 02:25:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:39,012 INFO L225 Difference]: With dead ends: 555 [2023-11-12 02:25:39,013 INFO L226 Difference]: Without dead ends: 515 [2023-11-12 02:25:39,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 02:25:39,015 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 866 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:39,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 126 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:25:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-12 02:25:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 447. [2023-11-12 02:25:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3161434977578474) internal successors, (587), 446 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 587 transitions. [2023-11-12 02:25:39,044 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 587 transitions. Word has length 151 [2023-11-12 02:25:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:39,045 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 587 transitions. [2023-11-12 02:25:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 587 transitions. [2023-11-12 02:25:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-12 02:25:39,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:39,052 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:39,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:39,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:25:39,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:39,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash 749201748, now seen corresponding path program 3 times [2023-11-12 02:25:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:39,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275514969] [2023-11-12 02:25:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:39,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2023-11-12 02:25:42,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275514969] [2023-11-12 02:25:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275514969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571473943] [2023-11-12 02:25:42,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:25:42,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:42,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:42,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:42,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:25:45,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-12 02:25:45,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:45,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:25:45,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2023-11-12 02:25:46,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:25:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6026 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2023-11-12 02:25:47,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571473943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:25:47,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:25:47,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26, 26] total 74 [2023-11-12 02:25:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083960010] [2023-11-12 02:25:47,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:25:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-12 02:25:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:25:47,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-12 02:25:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2023-11-12 02:25:47,728 INFO L87 Difference]: Start difference. First operand 447 states and 587 transitions. Second operand has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:25:50,279 INFO L93 Difference]: Finished difference Result 875 states and 1167 transitions. [2023-11-12 02:25:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-12 02:25:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2023-11-12 02:25:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:25:50,286 INFO L225 Difference]: With dead ends: 875 [2023-11-12 02:25:50,286 INFO L226 Difference]: Without dead ends: 799 [2023-11-12 02:25:50,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2023-11-12 02:25:50,290 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1545 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:25:50,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 173 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:25:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-12 02:25:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 791. [2023-11-12 02:25:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.2734177215189872) internal successors, (1006), 790 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1006 transitions. [2023-11-12 02:25:50,362 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1006 transitions. Word has length 307 [2023-11-12 02:25:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:25:50,363 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1006 transitions. [2023-11-12 02:25:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.283783783783784) internal successors, (391), 74 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:25:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1006 transitions. [2023-11-12 02:25:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2023-11-12 02:25:50,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:25:50,377 INFO L195 NwaCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:25:50,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:25:50,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:25:50,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:25:50,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:25:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash 823095820, now seen corresponding path program 4 times [2023-11-12 02:25:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:25:50,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411282583] [2023-11-12 02:25:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:25:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:25:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:25:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2023-11-12 02:25:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:25:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411282583] [2023-11-12 02:25:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411282583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:25:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414502952] [2023-11-12 02:25:58,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:25:58,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:25:58,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:25:58,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:25:58,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40ef8e17-c40c-4f39-9413-503ed942eb93/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:25:58,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:25:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:25:58,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-12 02:25:58,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:25:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2023-11-12 02:25:59,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:26:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20093 backedges. 0 proven. 12496 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2023-11-12 02:26:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414502952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:26:06,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:26:06,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 147 [2023-11-12 02:26:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876891392] [2023-11-12 02:26:06,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:26:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2023-11-12 02:26:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2023-11-12 02:26:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2023-11-12 02:26:06,850 INFO L87 Difference]: Start difference. First operand 791 states and 1006 transitions. Second operand has 147 states, 147 states have (on average 4.9523809523809526) internal successors, (728), 147 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)