./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme --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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:31,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:31,179 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:31,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:31,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:31,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:31,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:31,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:31,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:31,251 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:31,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:31,253 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:31,254 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:31,255 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:31,256 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:31,257 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:31,257 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:31,257 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:31,258 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:31,258 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:31,259 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:31,259 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:31,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:31,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:31,261 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:31,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:31,262 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:31,263 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:31,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:31,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:31,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:31,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:31,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:31,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:31,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:31,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:31,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:31,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:31,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:31,274 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:31,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:31,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:31,275 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_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2023-11-26 11:48:31,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:31,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:31,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:31,607 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:31,607 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:31,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-11-26 11:48:34,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:34,843 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:34,844 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-11-26 11:48:34,855 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/data/55dcaa2e7/25cc8fe0c8f04c4c823276f8412ec5b8/FLAG1a84dfdf6 [2023-11-26 11:48:34,874 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/data/55dcaa2e7/25cc8fe0c8f04c4c823276f8412ec5b8 [2023-11-26 11:48:34,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:34,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:34,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:34,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:34,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:34,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:34,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69560f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:34, skipping insertion in model container [2023-11-26 11:48:34,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:34" (1/1) ... [2023-11-26 11:48:34,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:48:35,113 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_6ce46955-eae5-47a2-aafa-9c6970809d9f/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2023-11-26 11:48:35,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:35,154 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:48:35,173 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_6ce46955-eae5-47a2-aafa-9c6970809d9f/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2023-11-26 11:48:35,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:48:35,210 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:48:35,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35 WrapperNode [2023-11-26 11:48:35,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:35,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:35,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:48:35,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:48:35,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,258 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-26 11:48:35,259 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:48:35,260 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:48:35,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:48:35,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:48:35,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,307 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-26 11:48:35,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,323 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,329 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:48:35,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:48:35,337 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:48:35,337 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:48:35,338 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (1/1) ... [2023-11-26 11:48:35,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:35,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:35,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:48:35,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:48:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:48:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:48:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:48:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:48:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:48:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:48:35,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:48:35,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:48:35,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:48:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:48:35,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:48:35,513 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:48:35,515 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:48:35,667 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:48:35,699 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:48:35,699 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-26 11:48:35,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:35 BoogieIcfgContainer [2023-11-26 11:48:35,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:48:35,703 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:48:35,704 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:48:35,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:48:35,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:34" (1/3) ... [2023-11-26 11:48:35,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6871cea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:35, skipping insertion in model container [2023-11-26 11:48:35,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:35" (2/3) ... [2023-11-26 11:48:35,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6871cea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:48:35, skipping insertion in model container [2023-11-26 11:48:35,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:48:35" (3/3) ... [2023-11-26 11:48:35,710 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-11-26 11:48:35,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:48:35,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:48:35,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:35,784 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;@74bb2750, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:35,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:48:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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) [2023-11-26 11:48:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:48:35,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:35,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:35,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:35,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:35,799 INFO L85 PathProgramCache]: Analyzing trace with hash 993314077, now seen corresponding path program 1 times [2023-11-26 11:48:35,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:35,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185934118] [2023-11-26 11:48:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185934118] [2023-11-26 11:48:36,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185934118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:36,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:36,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:48:36,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088621302] [2023-11-26 11:48:36,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:36,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:36,164 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 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 3.3333333333333335) internal successors, (10), 2 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) [2023-11-26 11:48:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:36,251 INFO L93 Difference]: Finished difference Result 39 states and 63 transitions. [2023-11-26 11:48:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:48:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) Word has length 10 [2023-11-26 11:48:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:36,261 INFO L225 Difference]: With dead ends: 39 [2023-11-26 11:48:36,261 INFO L226 Difference]: Without dead ends: 18 [2023-11-26 11:48:36,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:36,268 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:36,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-26 11:48:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-26 11:48:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2023-11-26 11:48:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-11-26 11:48:36,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2023-11-26 11:48:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:36,303 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-11-26 11:48:36,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-11-26 11:48:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-11-26 11:48:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:48:36,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:36,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:36,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:48:36,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:36,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash -876846921, now seen corresponding path program 1 times [2023-11-26 11:48:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389540492] [2023-11-26 11:48:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:36,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:36,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389540492] [2023-11-26 11:48:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389540492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268797014] [2023-11-26 11:48:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:36,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:36,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:48:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:36,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:36,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:36,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:36,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268797014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:36,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:36,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2023-11-26 11:48:36,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845589234] [2023-11-26 11:48:36,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:36,588 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2023-11-26 11:48:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:36,683 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-11-26 11:48:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) Word has length 11 [2023-11-26 11:48:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:36,685 INFO L225 Difference]: With dead ends: 32 [2023-11-26 11:48:36,685 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 11:48:36,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:48:36,687 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:36,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 11:48:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-11-26 11:48:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-26 11:48:36,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2023-11-26 11:48:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:36,694 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-26 11:48:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2023-11-26 11:48:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-26 11:48:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 11:48:36,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:36,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:36,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:36,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:48:36,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:36,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:36,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1648555766, now seen corresponding path program 1 times [2023-11-26 11:48:36,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:36,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102705945] [2023-11-26 11:48:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:36,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:36,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102705945] [2023-11-26 11:48:36,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102705945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824827833] [2023-11-26 11:48:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:36,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:36,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:37,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:48:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:37,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:48:37,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:37,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:48:37,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824827833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:37,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:37,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 11:48:37,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282592556] [2023-11-26 11:48:37,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:37,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:48:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:48:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:37,152 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-26 11:48:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:37,215 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-26 11:48:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 14 [2023-11-26 11:48:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:37,217 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:48:37,217 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 11:48:37,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:48:37,219 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:37,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 11:48:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 22. [2023-11-26 11:48:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2023-11-26 11:48:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-26 11:48:37,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-11-26 11:48:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-26 11:48:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-26 11:48:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-26 11:48:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:48:37,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:37,229 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:37,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:37,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:37,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1558961252, now seen corresponding path program 2 times [2023-11-26 11:48:37,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:37,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097461971] [2023-11-26 11:48:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097461971] [2023-11-26 11:48:37,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097461971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:37,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:37,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:48:37,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670239727] [2023-11-26 11:48:37,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:48:37,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:48:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:48:37,680 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-11-26 11:48:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:37,754 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-11-26 11:48:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:48:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 17 [2023-11-26 11:48:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:37,757 INFO L225 Difference]: With dead ends: 43 [2023-11-26 11:48:37,757 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 11:48:37,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:48:37,759 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:37,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 11:48:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2023-11-26 11:48:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2023-11-26 11:48:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-26 11:48:37,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2023-11-26 11:48:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:37,773 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-26 11:48:37,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-11-26 11:48:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-26 11:48:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:48:37,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:37,774 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:37,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:48:37,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:37,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1158567996, now seen corresponding path program 1 times [2023-11-26 11:48:37,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059682578] [2023-11-26 11:48:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:48:37,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059682578] [2023-11-26 11:48:37,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059682578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874671836] [2023-11-26 11:48:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:37,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:37,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:37,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:48:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:38,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:48:38,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:48:38,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:48:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874671836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:38,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:38,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-26 11:48:38,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375017837] [2023-11-26 11:48:38,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:38,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:48:38,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:48:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:48:38,233 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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) [2023-11-26 11:48:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:38,519 INFO L93 Difference]: Finished difference Result 86 states and 125 transitions. [2023-11-26 11:48:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:48:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 20 [2023-11-26 11:48:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:38,521 INFO L225 Difference]: With dead ends: 86 [2023-11-26 11:48:38,521 INFO L226 Difference]: Without dead ends: 69 [2023-11-26 11:48:38,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:48:38,524 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 182 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:38,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 58 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:48:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-26 11:48:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-26 11:48:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 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) [2023-11-26 11:48:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2023-11-26 11:48:38,540 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 20 [2023-11-26 11:48:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:38,540 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2023-11-26 11:48:38,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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) [2023-11-26 11:48:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2023-11-26 11:48:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-26 11:48:38,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:38,543 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:38,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:38,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2125129476, now seen corresponding path program 2 times [2023-11-26 11:48:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:38,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042438874] [2023-11-26 11:48:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:38,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-26 11:48:39,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042438874] [2023-11-26 11:48:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042438874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:39,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516951173] [2023-11-26 11:48:39,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:48:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:39,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:39,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:48:39,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:48:39,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:39,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:48:39,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-26 11:48:39,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-26 11:48:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516951173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:39,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-26 11:48:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136564010] [2023-11-26 11:48:39,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:39,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:48:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:48:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:48:39,629 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2023-11-26 11:48:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:39,954 INFO L93 Difference]: Finished difference Result 306 states and 407 transitions. [2023-11-26 11:48:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:48:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 50 [2023-11-26 11:48:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:39,960 INFO L225 Difference]: With dead ends: 306 [2023-11-26 11:48:39,961 INFO L226 Difference]: Without dead ends: 249 [2023-11-26 11:48:39,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:48:39,964 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 757 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:39,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 247 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:48:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-26 11:48:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 81. [2023-11-26 11:48:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 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) [2023-11-26 11:48:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-11-26 11:48:40,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 50 [2023-11-26 11:48:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:40,003 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-11-26 11:48:40,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2023-11-26 11:48:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-11-26 11:48:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-26 11:48:40,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:40,007 INFO L195 NwaCegarLoop]: trace histogram [22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:40,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:40,221 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 815327876, now seen corresponding path program 3 times [2023-11-26 11:48:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:40,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767578843] [2023-11-26 11:48:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:40,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-26 11:48:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767578843] [2023-11-26 11:48:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767578843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:41,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635449454] [2023-11-26 11:48:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:48:41,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:41,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:41,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:48:41,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:48:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:41,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:48:41,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2023-11-26 11:48:41,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:48:41,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635449454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:41,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:48:41,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [24] total 29 [2023-11-26 11:48:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865908624] [2023-11-26 11:48:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:48:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:48:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:48:41,385 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-11-26 11:48:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:41,508 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2023-11-26 11:48:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:48:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 62 [2023-11-26 11:48:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:41,510 INFO L225 Difference]: With dead ends: 170 [2023-11-26 11:48:41,511 INFO L226 Difference]: Without dead ends: 161 [2023-11-26 11:48:41,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:48:41,513 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:41,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:48:41,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-26 11:48:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 82. [2023-11-26 11:48:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 81 states have internal predecessors, (104), 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) [2023-11-26 11:48:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2023-11-26 11:48:41,546 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 62 [2023-11-26 11:48:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:41,548 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2023-11-26 11:48:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-11-26 11:48:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2023-11-26 11:48:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 11:48:41,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:41,550 INFO L195 NwaCegarLoop]: trace histogram [22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:41,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:41,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:41,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1299159644, now seen corresponding path program 4 times [2023-11-26 11:48:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183015122] [2023-11-26 11:48:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-26 11:48:42,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183015122] [2023-11-26 11:48:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183015122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731795129] [2023-11-26 11:48:42,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:48:42,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:42,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:42,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:48:42,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:48:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:42,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:48:42,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-11-26 11:48:42,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-11-26 11:48:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731795129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:43,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:43,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2023-11-26 11:48:43,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621990684] [2023-11-26 11:48:43,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:43,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-26 11:48:43,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-26 11:48:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 11:48:43,160 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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) [2023-11-26 11:48:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:44,135 INFO L93 Difference]: Finished difference Result 383 states and 529 transitions. [2023-11-26 11:48:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-26 11:48:44,135 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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 65 [2023-11-26 11:48:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:44,139 INFO L225 Difference]: With dead ends: 383 [2023-11-26 11:48:44,139 INFO L226 Difference]: Without dead ends: 279 [2023-11-26 11:48:44,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1195, Invalid=2227, Unknown=0, NotChecked=0, Total=3422 [2023-11-26 11:48:44,143 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 462 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:44,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 221 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:48:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-26 11:48:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 208. [2023-11-26 11:48:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.3333333333333333) internal successors, (276), 207 states have internal predecessors, (276), 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) [2023-11-26 11:48:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 276 transitions. [2023-11-26 11:48:44,211 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 276 transitions. Word has length 65 [2023-11-26 11:48:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:44,211 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 276 transitions. [2023-11-26 11:48:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 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) [2023-11-26 11:48:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 276 transitions. [2023-11-26 11:48:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-26 11:48:44,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:44,223 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:44,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:48:44,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:44,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash 632352997, now seen corresponding path program 5 times [2023-11-26 11:48:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399883017] [2023-11-26 11:48:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2023-11-26 11:48:46,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:46,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399883017] [2023-11-26 11:48:46,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399883017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:46,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255074255] [2023-11-26 11:48:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:48:46,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:46,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:46,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:48:47,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-11-26 11:48:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:47,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 11:48:47,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 1523 proven. 61 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-11-26 11:48:49,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 1553 proven. 31 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-11-26 11:48:51,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255074255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:51,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:51,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 104 [2023-11-26 11:48:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457312746] [2023-11-26 11:48:51,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-26 11:48:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-26 11:48:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=8090, Unknown=0, NotChecked=0, Total=10712 [2023-11-26 11:48:51,249 INFO L87 Difference]: Start difference. First operand 208 states and 276 transitions. Second operand has 104 states, 104 states have (on average 2.3365384615384617) internal successors, (243), 104 states have internal predecessors, (243), 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) [2023-11-26 11:48:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:48:54,882 INFO L93 Difference]: Finished difference Result 435 states and 616 transitions. [2023-11-26 11:48:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-26 11:48:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.3365384615384617) internal successors, (243), 104 states have internal predecessors, (243), 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 145 [2023-11-26 11:48:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:48:54,885 INFO L225 Difference]: With dead ends: 435 [2023-11-26 11:48:54,885 INFO L226 Difference]: Without dead ends: 262 [2023-11-26 11:48:54,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11017 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10259, Invalid=33631, Unknown=0, NotChecked=0, Total=43890 [2023-11-26 11:48:54,906 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1839 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:48:54,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1839 Valid, 422 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:48:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-26 11:48:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 254. [2023-11-26 11:48:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2885375494071147) internal successors, (326), 253 states have internal predecessors, (326), 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) [2023-11-26 11:48:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 326 transitions. [2023-11-26 11:48:54,983 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 326 transitions. Word has length 145 [2023-11-26 11:48:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:48:54,984 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 326 transitions. [2023-11-26 11:48:54,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.3365384615384617) internal successors, (243), 104 states have internal predecessors, (243), 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) [2023-11-26 11:48:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 326 transitions. [2023-11-26 11:48:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-26 11:48:54,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:48:54,987 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:55,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:55,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:55,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:48:55,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash 274811826, now seen corresponding path program 6 times [2023-11-26 11:48:55,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:55,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120624283] [2023-11-26 11:48:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:55,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5290 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4695 trivial. 0 not checked. [2023-11-26 11:48:57,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120624283] [2023-11-26 11:48:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120624283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467792027] [2023-11-26 11:48:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:48:57,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:57,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:57,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:48:57,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-26 11:48:57,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:57,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:48:57,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5290 backedges. 2278 proven. 14 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [2023-11-26 11:48:57,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5290 backedges. 2279 proven. 13 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [2023-11-26 11:48:57,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467792027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:57,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:48:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 8, 8] total 44 [2023-11-26 11:48:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468105158] [2023-11-26 11:48:57,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-26 11:48:57,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-26 11:48:57,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=1207, Unknown=0, NotChecked=0, Total=1892 [2023-11-26 11:48:57,795 INFO L87 Difference]: Start difference. First operand 254 states and 326 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 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) [2023-11-26 11:49:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:04,844 INFO L93 Difference]: Finished difference Result 637 states and 846 transitions. [2023-11-26 11:49:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-11-26 11:49:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 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 251 [2023-11-26 11:49:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:04,847 INFO L225 Difference]: With dead ends: 637 [2023-11-26 11:49:04,848 INFO L226 Difference]: Without dead ends: 359 [2023-11-26 11:49:04,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 560 SyntacticMatches, 4 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15735 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=12642, Invalid=32940, Unknown=0, NotChecked=0, Total=45582 [2023-11-26 11:49:04,854 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2399 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:04,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2399 Valid, 144 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:49:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-26 11:49:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2023-11-26 11:49:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3) internal successors, (455), 350 states have internal predecessors, (455), 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) [2023-11-26 11:49:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 455 transitions. [2023-11-26 11:49:04,956 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 455 transitions. Word has length 251 [2023-11-26 11:49:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:04,956 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 455 transitions. [2023-11-26 11:49:04,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 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) [2023-11-26 11:49:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 455 transitions. [2023-11-26 11:49:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-11-26 11:49:04,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:04,962 INFO L195 NwaCegarLoop]: trace histogram [67, 67, 67, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:04,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:05,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:49:05,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:05,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash 325026051, now seen corresponding path program 7 times [2023-11-26 11:49:05,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:05,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422293989] [2023-11-26 11:49:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11258 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-11-26 11:49:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422293989] [2023-11-26 11:49:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422293989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622107499] [2023-11-26 11:49:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:49:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:07,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:07,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:49:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:07,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 11:49:07,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11258 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-11-26 11:49:08,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11258 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-11-26 11:49:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622107499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:09,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:09,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2023-11-26 11:49:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976221381] [2023-11-26 11:49:09,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-26 11:49:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-26 11:49:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2023-11-26 11:49:09,892 INFO L87 Difference]: Start difference. First operand 351 states and 455 transitions. Second operand has 75 states, 75 states have (on average 1.2) internal successors, (90), 74 states have internal predecessors, (90), 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) [2023-11-26 11:49:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:12,057 INFO L93 Difference]: Finished difference Result 1368 states and 1797 transitions. [2023-11-26 11:49:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-26 11:49:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2) internal successors, (90), 74 states have internal predecessors, (90), 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 348 [2023-11-26 11:49:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:12,064 INFO L225 Difference]: With dead ends: 1368 [2023-11-26 11:49:12,065 INFO L226 Difference]: Without dead ends: 1054 [2023-11-26 11:49:12,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2023-11-26 11:49:12,067 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2866 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2866 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:12,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2866 Valid, 659 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:49:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2023-11-26 11:49:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 388. [2023-11-26 11:49:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.2713178294573644) internal successors, (492), 387 states have internal predecessors, (492), 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) [2023-11-26 11:49:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 492 transitions. [2023-11-26 11:49:12,166 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 492 transitions. Word has length 348 [2023-11-26 11:49:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:12,166 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 492 transitions. [2023-11-26 11:49:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2) internal successors, (90), 74 states have internal predecessors, (90), 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) [2023-11-26 11:49:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 492 transitions. [2023-11-26 11:49:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-11-26 11:49:12,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:12,174 INFO L195 NwaCegarLoop]: trace histogram [72, 67, 67, 67, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:12,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:49:12,383 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:12,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1091289187, now seen corresponding path program 8 times [2023-11-26 11:49:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:12,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188367342] [2023-11-26 11:49:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13256 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-11-26 11:49:17,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:17,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188367342] [2023-11-26 11:49:17,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188367342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:17,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449915066] [2023-11-26 11:49:17,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:49:17,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:17,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:17,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:17,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce46955-eae5-47a2-aafa-9c6970809d9f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:49:18,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:49:18,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:49:18,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-26 11:49:18,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13256 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 10628 trivial. 0 not checked. [2023-11-26 11:49:18,608 INFO L327 TraceCheckSpWp]: Computing backward predicates...