./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ --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 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:39:03,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:39:03,911 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 21:39:03,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:39:03,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:39:03,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:39:03,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:39:03,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:39:03,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 21:39:03,964 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 21:39:03,965 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:39:03,966 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:39:03,967 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:39:03,968 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:39:03,969 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:39:03,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:39:03,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:39:03,970 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:39:03,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:39:03,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:39:03,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:39:03,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:39:03,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:39:03,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:39:03,975 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:39:03,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:39:03,976 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:39:03,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:39:03,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:39:03,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:39:03,979 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:39:03,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:39:03,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:39:03,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:39:03,980 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:39:03,980 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:39:03,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:39:03,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:39:03,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:39:03,981 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:39:03,981 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:39:03,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:39:03,982 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_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 [2023-11-23 21:39:04,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:39:04,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:39:04,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:39:04,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:39:04,323 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:39:04,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/loop-acceleration/nested_1-2.c [2023-11-23 21:39:07,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:39:07,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:39:07,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2023-11-23 21:39:07,660 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/data/9d7a8e3cb/5f7b45a159514eb5ab660a05cee54b4b/FLAG29bf156a7 [2023-11-23 21:39:07,677 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/data/9d7a8e3cb/5f7b45a159514eb5ab660a05cee54b4b [2023-11-23 21:39:07,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:39:07,684 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:39:07,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:39:07,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:39:07,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:39:07,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:07,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f951dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07, skipping insertion in model container [2023-11-23 21:39:07,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:07,719 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:39:07,911 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_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2023-11-23 21:39:07,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:39:07,942 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:39:07,955 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_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2023-11-23 21:39:07,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:39:07,976 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:39:07,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07 WrapperNode [2023-11-23 21:39:07,976 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:39:07,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:39:07,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:39:07,978 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:39:07,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:07,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,013 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2023-11-23 21:39:08,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:39:08,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:39:08,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:39:08,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:39:08,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,027 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,039 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 21:39:08,039 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,048 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,055 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,056 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,065 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:39:08,067 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:39:08,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:39:08,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:39:08,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (1/1) ... [2023-11-23 21:39:08,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:39:08,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:08,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:39:08,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:39:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:39:08,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:39:08,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:39:08,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 21:39:08,218 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:39:08,220 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:39:08,379 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:39:08,403 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:39:08,405 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:39:08,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:08 BoogieIcfgContainer [2023-11-23 21:39:08,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:39:08,409 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:39:08,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:39:08,413 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:39:08,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:39:07" (1/3) ... [2023-11-23 21:39:08,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236f5115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:39:08, skipping insertion in model container [2023-11-23 21:39:08,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:39:07" (2/3) ... [2023-11-23 21:39:08,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236f5115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:39:08, skipping insertion in model container [2023-11-23 21:39:08,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:39:08" (3/3) ... [2023-11-23 21:39:08,418 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2023-11-23 21:39:08,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:39:08,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:39:08,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:39:08,503 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;@18424d3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:39:08,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:39:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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) [2023-11-23 21:39:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:39:08,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:08,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:39:08,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:08,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash 68636575, now seen corresponding path program 1 times [2023-11-23 21:39:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:08,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456601052] [2023-11-23 21:39:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:08,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:39:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456601052] [2023-11-23 21:39:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456601052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:39:08,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:39:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:39:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051596714] [2023-11-23 21:39:08,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:39:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:39:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:39:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:39:08,813 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-23 21:39:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:08,847 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2023-11-23 21:39:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:39:08,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-23 21:39:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:08,857 INFO L225 Difference]: With dead ends: 22 [2023-11-23 21:39:08,858 INFO L226 Difference]: Without dead ends: 11 [2023-11-23 21:39:08,860 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 [2023-11-23 21:39:08,865 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:08,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-23 21:39:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-11-23 21:39:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2023-11-23 21:39:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-23 21:39:08,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2023-11-23 21:39:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:08,898 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-23 21:39:08,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-23 21:39:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-23 21:39:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:39:08,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:08,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:08,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:39:08,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:08,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1829337052, now seen corresponding path program 1 times [2023-11-23 21:39:08,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:08,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793348873] [2023-11-23 21:39:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:08,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:39:08,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:08,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793348873] [2023-11-23 21:39:08,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793348873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:39:08,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:39:08,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:39:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511308364] [2023-11-23 21:39:08,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:39:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:39:08,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:39:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:39:08,982 INFO L87 Difference]: Start difference. First operand 9 states and 10 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) [2023-11-23 21:39:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:08,996 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2023-11-23 21:39:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:39:08,997 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 [2023-11-23 21:39:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:08,998 INFO L225 Difference]: With dead ends: 17 [2023-11-23 21:39:08,998 INFO L226 Difference]: Without dead ends: 10 [2023-11-23 21:39:08,998 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 [2023-11-23 21:39:09,000 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:09,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-23 21:39:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-23 21:39:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-23 21:39:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-23 21:39:09,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-11-23 21:39:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:09,006 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-23 21:39:09,007 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) [2023-11-23 21:39:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-23 21:39:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:39:09,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:09,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:09,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:39:09,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:09,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1803577202, now seen corresponding path program 1 times [2023-11-23 21:39:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111093914] [2023-11-23 21:39:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:39:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111093914] [2023-11-23 21:39:09,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111093914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:09,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146267771] [2023-11-23 21:39:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:09,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:09,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:09,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:39:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:09,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:39:09,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:39:09,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:39:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146267771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:09,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 21:39:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334541892] [2023-11-23 21:39:09,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:39:09,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:39:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:39:09,391 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-23 21:39:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:09,433 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-11-23 21:39:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:39:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 9 [2023-11-23 21:39:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:09,434 INFO L225 Difference]: With dead ends: 21 [2023-11-23 21:39:09,435 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 21:39:09,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:39:09,437 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:09,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 21:39:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-23 21:39:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-11-23 21:39:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-23 21:39:09,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-23 21:39:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:09,445 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-23 21:39:09,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-23 21:39:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-23 21:39:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:39:09,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:09,446 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:39:09,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:09,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:39:09,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:09,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1444604836, now seen corresponding path program 2 times [2023-11-23 21:39:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857498484] [2023-11-23 21:39:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:39:09,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:09,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857498484] [2023-11-23 21:39:09,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857498484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370357423] [2023-11-23 21:39:09,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:39:09,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:10,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:10,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:39:10,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:39:10,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:10,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:39:10,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:39:10,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:39:10,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370357423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:10,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:10,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-11-23 21:39:10,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879712890] [2023-11-23 21:39:10,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:10,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:39:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:10,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:39:10,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:39:10,373 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2023-11-23 21:39:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:10,887 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-11-23 21:39:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-23 21:39:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 12 [2023-11-23 21:39:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:10,892 INFO L225 Difference]: With dead ends: 49 [2023-11-23 21:39:10,892 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 21:39:10,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:39:10,899 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:39:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 21:39:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-23 21:39:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 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) [2023-11-23 21:39:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-23 21:39:10,926 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 12 [2023-11-23 21:39:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:10,926 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-23 21:39:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2023-11-23 21:39:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-23 21:39:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:39:10,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:10,930 INFO L195 NwaCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-23 21:39:10,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:11,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:11,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:11,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:11,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2139814053, now seen corresponding path program 3 times [2023-11-23 21:39:11,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:11,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865074680] [2023-11-23 21:39:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:11,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-23 21:39:11,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:11,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865074680] [2023-11-23 21:39:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865074680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723021534] [2023-11-23 21:39:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:39:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:11,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:11,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:39:11,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-23 21:39:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:11,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:39:11,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-23 21:39:11,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-23 21:39:11,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723021534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:11,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:11,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-23 21:39:11,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002437899] [2023-11-23 21:39:11,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:11,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:39:11,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:11,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:39:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:39:11,741 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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) [2023-11-23 21:39:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:11,909 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2023-11-23 21:39:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:39:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 37 [2023-11-23 21:39:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:11,910 INFO L225 Difference]: With dead ends: 88 [2023-11-23 21:39:11,911 INFO L226 Difference]: Without dead ends: 58 [2023-11-23 21:39:11,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:39:11,912 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:11,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:39:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-23 21:39:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-23 21:39:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 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) [2023-11-23 21:39:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-23 21:39:11,938 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 37 [2023-11-23 21:39:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:11,938 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-23 21:39:11,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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) [2023-11-23 21:39:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-23 21:39:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:39:11,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:11,941 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-23 21:39:11,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:12,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:12,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:12,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash 934366687, now seen corresponding path program 4 times [2023-11-23 21:39:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:12,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648684738] [2023-11-23 21:39:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-23 21:39:12,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648684738] [2023-11-23 21:39:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648684738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:12,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969411406] [2023-11-23 21:39:12,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:39:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:12,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:12,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:39:12,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:39:12,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:12,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 21:39:12,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:39:12,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 30 proven. 752 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-23 21:39:13,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969411406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:13,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:13,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 22 [2023-11-23 21:39:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475337256] [2023-11-23 21:39:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 21:39:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 21:39:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:39:13,077 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 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) [2023-11-23 21:39:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:13,652 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2023-11-23 21:39:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:39:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 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 57 [2023-11-23 21:39:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:13,655 INFO L225 Difference]: With dead ends: 140 [2023-11-23 21:39:13,655 INFO L226 Difference]: Without dead ends: 136 [2023-11-23 21:39:13,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=598, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:39:13,657 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:13,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:39:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-23 21:39:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-23 21:39:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 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) [2023-11-23 21:39:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2023-11-23 21:39:13,722 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 57 [2023-11-23 21:39:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:13,723 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2023-11-23 21:39:13,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 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) [2023-11-23 21:39:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2023-11-23 21:39:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 21:39:13,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:13,735 INFO L195 NwaCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1] [2023-11-23 21:39:13,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:13,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:13,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1891032895, now seen corresponding path program 5 times [2023-11-23 21:39:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733642655] [2023-11-23 21:39:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-23 21:39:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:14,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733642655] [2023-11-23 21:39:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733642655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:14,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103936607] [2023-11-23 21:39:14,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:39:14,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:14,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:14,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:39:15,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-11-23 21:39:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:15,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:39:15,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-11-23 21:39:15,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2023-11-23 21:39:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103936607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:16,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:16,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 4] total 16 [2023-11-23 21:39:16,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917996364] [2023-11-23 21:39:16,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:16,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:39:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:39:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:39:16,232 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 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) [2023-11-23 21:39:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:16,453 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2023-11-23 21:39:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:39:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 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 135 [2023-11-23 21:39:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:16,459 INFO L225 Difference]: With dead ends: 180 [2023-11-23 21:39:16,459 INFO L226 Difference]: Without dead ends: 174 [2023-11-23 21:39:16,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:39:16,461 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:16,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 279 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:39:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-23 21:39:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2023-11-23 21:39:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0810810810810811) internal successors, (160), 148 states have internal predecessors, (160), 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) [2023-11-23 21:39:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2023-11-23 21:39:16,523 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 135 [2023-11-23 21:39:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:16,526 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2023-11-23 21:39:16,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 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) [2023-11-23 21:39:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2023-11-23 21:39:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 21:39:16,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:16,537 INFO L195 NwaCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1] [2023-11-23 21:39:16,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:16,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:16,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:16,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash -670622852, now seen corresponding path program 6 times [2023-11-23 21:39:16,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:16,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579497154] [2023-11-23 21:39:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2023-11-23 21:39:17,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:17,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579497154] [2023-11-23 21:39:17,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579497154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:17,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522828609] [2023-11-23 21:39:17,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 21:39:17,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:17,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:17,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:17,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:39:19,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2023-11-23 21:39:19,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:39:19,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:39:19,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2023-11-23 21:39:19,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2023-11-23 21:39:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522828609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:20,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:20,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-11-23 21:39:20,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361094742] [2023-11-23 21:39:20,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:20,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 21:39:20,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:20,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 21:39:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:39:20,190 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 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) [2023-11-23 21:39:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:39:22,780 INFO L93 Difference]: Finished difference Result 335 states and 366 transitions. [2023-11-23 21:39:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 21:39:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 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 148 [2023-11-23 21:39:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:39:22,784 INFO L225 Difference]: With dead ends: 335 [2023-11-23 21:39:22,784 INFO L226 Difference]: Without dead ends: 331 [2023-11-23 21:39:22,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=516, Invalid=890, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:39:22,786 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:39:22,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 346 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:39:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-23 21:39:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2023-11-23 21:39:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0787878787878789) internal successors, (356), 330 states have internal predecessors, (356), 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) [2023-11-23 21:39:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 356 transitions. [2023-11-23 21:39:22,888 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 356 transitions. Word has length 148 [2023-11-23 21:39:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:39:22,889 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 356 transitions. [2023-11-23 21:39:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 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) [2023-11-23 21:39:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 356 transitions. [2023-11-23 21:39:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-23 21:39:22,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:39:22,896 INFO L195 NwaCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1] [2023-11-23 21:39:22,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:39:23,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:39:23,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:39:23,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:39:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -551640676, now seen corresponding path program 7 times [2023-11-23 21:39:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 21:39:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672258335] [2023-11-23 21:39:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:39:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:39:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2023-11-23 21:39:25,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 21:39:25,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672258335] [2023-11-23 21:39:25,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672258335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:39:25,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808594196] [2023-11-23 21:39:25,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:39:25,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:39:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:39:25,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:39:26,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f154d0de-64f3-4a9e-ba2a-0431a7023a2e/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:39:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:39:26,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-23 21:39:26,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:39:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2023-11-23 21:39:26,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:39:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2023-11-23 21:39:28,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808594196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:39:28,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:39:28,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2023-11-23 21:39:28,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218788156] [2023-11-23 21:39:28,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:39:28,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-23 21:39:28,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 21:39:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-23 21:39:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=2135, Unknown=0, NotChecked=0, Total=2970 [2023-11-23 21:39:28,947 INFO L87 Difference]: Start difference. First operand 331 states and 356 transitions. Second operand has 55 states, 55 states have (on average 3.8) internal successors, (209), 54 states have internal predecessors, (209), 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)