./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --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_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/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_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/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_601d5869-186c-4c52-93ba-6c1efa32e785/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 f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:04,188 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:04,317 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:52:04,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:04,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:04,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:04,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:04,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:04,375 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:04,380 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:04,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:04,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:04,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:04,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:04,386 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:04,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:04,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:52:04,388 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:04,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:04,389 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:04,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:04,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:52:04,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:04,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:52:04,393 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:04,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:52:04,393 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:04,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:04,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:04,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:04,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:04,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:04,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:04,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:04,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:52:04,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:04,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:04,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:04,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:04,400 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:52:04,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:04,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:04,401 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_601d5869-186c-4c52-93ba-6c1efa32e785/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2023-11-26 11:52:04,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:04,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:04,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:04,753 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:04,753 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:04,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/loop-simple/deep-nested.c [2023-11-26 11:52:07,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:08,020 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:08,021 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/sv-benchmarks/c/loop-simple/deep-nested.c [2023-11-26 11:52:08,028 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/data/a0104b425/008089925e374802bd3b1ca856942e59/FLAG79ea97756 [2023-11-26 11:52:08,044 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/data/a0104b425/008089925e374802bd3b1ca856942e59 [2023-11-26 11:52:08,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:08,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:08,050 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:08,050 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:08,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:08,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2746b80d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08, skipping insertion in model container [2023-11-26 11:52:08,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,079 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:08,235 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_601d5869-186c-4c52-93ba-6c1efa32e785/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2023-11-26 11:52:08,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:08,254 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:08,268 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_601d5869-186c-4c52-93ba-6c1efa32e785/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2023-11-26 11:52:08,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:08,283 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:08,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08 WrapperNode [2023-11-26 11:52:08,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:08,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:08,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:08,285 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:08,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,299 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,318 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-26 11:52:08,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:08,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:08,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:08,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:08,327 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,329 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,341 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:52:08,341 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,342 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,353 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:08,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:08,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:08,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:08,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (1/1) ... [2023-11-26 11:52:08,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:08,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:08,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:08,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:08,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:08,537 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:08,540 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:08,800 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:08,824 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:08,824 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-26 11:52:08,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:08 BoogieIcfgContainer [2023-11-26 11:52:08,825 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:08,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:08,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:08,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:08,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:08" (1/3) ... [2023-11-26 11:52:08,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da0909d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:08, skipping insertion in model container [2023-11-26 11:52:08,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:08" (2/3) ... [2023-11-26 11:52:08,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da0909d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:08, skipping insertion in model container [2023-11-26 11:52:08,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:08" (3/3) ... [2023-11-26 11:52:08,835 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-11-26 11:52:08,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:08,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:08,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:08,917 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;@4d208018, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:08,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 11:52:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 11:52:08,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:08,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:08,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:08,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1672362000, now seen corresponding path program 1 times [2023-11-26 11:52:08,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:08,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657357369] [2023-11-26 11:52:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:08,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:09,409 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 11:52:09,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657357369] [2023-11-26 11:52:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657357369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:09,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:09,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119014000] [2023-11-26 11:52:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:09,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:09,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:09,454 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:09,551 INFO L93 Difference]: Finished difference Result 34 states and 57 transitions. [2023-11-26 11:52:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-26 11:52:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:09,562 INFO L225 Difference]: With dead ends: 34 [2023-11-26 11:52:09,562 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 11:52:09,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 11:52:09,574 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:09,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 11:52:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-26 11:52:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 11:52:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-26 11:52:09,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 8 [2023-11-26 11:52:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:09,613 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-26 11:52:09,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-26 11:52:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:52:09,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:09,615 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:09,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:52:09,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:09,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 288176442, now seen corresponding path program 1 times [2023-11-26 11:52:09,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138425156] [2023-11-26 11:52:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:09,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:52:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:10,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138425156] [2023-11-26 11:52:10,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138425156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:10,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:10,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844806628] [2023-11-26 11:52:10,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:10,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:10,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:10,206 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. 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 11:52:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:10,285 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2023-11-26 11:52:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:10,286 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 11 [2023-11-26 11:52:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:10,289 INFO L225 Difference]: With dead ends: 31 [2023-11-26 11:52:10,289 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 11:52:10,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 11:52:10,292 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:10,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 11:52:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-26 11:52:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 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 11:52:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-11-26 11:52:10,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 11 [2023-11-26 11:52:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:10,313 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-11-26 11:52:10,313 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 11:52:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-11-26 11:52:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 11:52:10,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:10,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:10,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:52:10,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:10,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash 22882177, now seen corresponding path program 1 times [2023-11-26 11:52:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308082982] [2023-11-26 11:52:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:10,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:10,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308082982] [2023-11-26 11:52:10,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308082982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179321875] [2023-11-26 11:52:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:10,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:10,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:10,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:52:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:10,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:10,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:52:10,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179321875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:10,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:10,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-26 11:52:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621657812] [2023-11-26 11:52:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:10,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:10,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:10,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:10,780 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 11:52:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:10,906 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-26 11:52:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:52:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 11:52:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:10,912 INFO L225 Difference]: With dead ends: 66 [2023-11-26 11:52:10,912 INFO L226 Difference]: Without dead ends: 51 [2023-11-26 11:52:10,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:52:10,923 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:10,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-26 11:52:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2023-11-26 11:52:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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 11:52:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-11-26 11:52:10,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2023-11-26 11:52:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:10,946 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-11-26 11:52:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 11:52:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-11-26 11:52:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:52:10,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:10,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:10,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:11,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:11,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:11,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:11,154 INFO L85 PathProgramCache]: Analyzing trace with hash -4911268, now seen corresponding path program 1 times [2023-11-26 11:52:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:11,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502485660] [2023-11-26 11:52:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:11,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:52:11,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502485660] [2023-11-26 11:52:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502485660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001409407] [2023-11-26 11:52:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:11,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:11,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:11,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:52:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:11,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:11,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:52:11,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:11,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001409407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:11,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:11,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:52:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430072585] [2023-11-26 11:52:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:52:11,487 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 11:52:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:11,614 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-11-26 11:52:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 11:52:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:11,616 INFO L225 Difference]: With dead ends: 75 [2023-11-26 11:52:11,616 INFO L226 Difference]: Without dead ends: 49 [2023-11-26 11:52:11,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:52:11,618 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:11,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-26 11:52:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2023-11-26 11:52:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 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 11:52:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-26 11:52:11,629 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2023-11-26 11:52:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:11,630 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-26 11:52:11,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 11:52:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-26 11:52:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:52:11,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:11,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:11,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:11,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:11,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:11,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -332318709, now seen corresponding path program 1 times [2023-11-26 11:52:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:11,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138400390] [2023-11-26 11:52:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:11,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:52:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138400390] [2023-11-26 11:52:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138400390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:12,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215707555] [2023-11-26 11:52:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:12,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:12,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:12,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:52:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:12,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:52:12,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:52:12,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:12,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215707555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:12,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:12,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:52:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230458449] [2023-11-26 11:52:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:12,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:12,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:52:12,236 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 11:52:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:12,359 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2023-11-26 11:52:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:12,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 20 [2023-11-26 11:52:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:12,363 INFO L225 Difference]: With dead ends: 75 [2023-11-26 11:52:12,363 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 11:52:12,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:52:12,365 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 73 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:12,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 11:52:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2023-11-26 11:52:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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 11:52:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-26 11:52:12,388 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 20 [2023-11-26 11:52:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:12,388 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-26 11:52:12,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 11:52:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-26 11:52:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:52:12,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:12,392 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:12,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:12,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:12,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:12,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1991159868, now seen corresponding path program 1 times [2023-11-26 11:52:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:12,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906815401] [2023-11-26 11:52:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:52:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906815401] [2023-11-26 11:52:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906815401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122873545] [2023-11-26 11:52:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:12,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:12,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:52:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:12,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:52:12,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:52:13,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:52:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122873545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:13,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:13,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-26 11:52:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892619087] [2023-11-26 11:52:13,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:13,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:52:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:52:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:52:13,485 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 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 11:52:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:15,502 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2023-11-26 11:52:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-26 11:52:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 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 26 [2023-11-26 11:52:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:15,504 INFO L225 Difference]: With dead ends: 185 [2023-11-26 11:52:15,504 INFO L226 Difference]: Without dead ends: 110 [2023-11-26 11:52:15,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 11:52:15,506 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 459 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:15,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 41 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:52:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-26 11:52:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2023-11-26 11:52:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 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 11:52:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2023-11-26 11:52:15,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 26 [2023-11-26 11:52:15,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:15,536 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2023-11-26 11:52:15,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 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 11:52:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2023-11-26 11:52:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 11:52:15,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:15,538 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:15,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:15,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:15,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:15,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -173694039, now seen corresponding path program 2 times [2023-11-26 11:52:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:15,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160513636] [2023-11-26 11:52:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-26 11:52:16,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:16,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160513636] [2023-11-26 11:52:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160513636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:16,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262500147] [2023-11-26 11:52:16,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:52:16,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:16,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:16,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:16,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:52:16,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:52:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:16,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:16,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-26 11:52:16,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:16,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262500147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:16,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:16,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-26 11:52:16,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694179725] [2023-11-26 11:52:16,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:16,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:16,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:16,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:16,461 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:16,529 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-11-26 11:52:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-26 11:52:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:16,533 INFO L225 Difference]: With dead ends: 72 [2023-11-26 11:52:16,533 INFO L226 Difference]: Without dead ends: 70 [2023-11-26 11:52:16,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:16,534 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:16,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-26 11:52:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-11-26 11:52:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 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 11:52:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-11-26 11:52:16,576 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 47 [2023-11-26 11:52:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:16,576 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-11-26 11:52:16,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-11-26 11:52:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-26 11:52:16,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:16,584 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:16,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:52:16,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:16,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:16,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash 915111332, now seen corresponding path program 3 times [2023-11-26 11:52:16,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:16,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439503105] [2023-11-26 11:52:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-26 11:52:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:17,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439503105] [2023-11-26 11:52:17,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439503105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:17,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212403358] [2023-11-26 11:52:17,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:52:17,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:17,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:17,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:17,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:52:17,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 11:52:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:17,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:17,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-26 11:52:17,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212403358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:17,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:17,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-26 11:52:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181525436] [2023-11-26 11:52:17,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:17,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:17,613 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 11:52:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:17,685 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2023-11-26 11:52:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) Word has length 62 [2023-11-26 11:52:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:17,688 INFO L225 Difference]: With dead ends: 104 [2023-11-26 11:52:17,688 INFO L226 Difference]: Without dead ends: 102 [2023-11-26 11:52:17,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:17,689 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:17,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-26 11:52:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2023-11-26 11:52:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 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 11:52:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-11-26 11:52:17,719 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 62 [2023-11-26 11:52:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:17,719 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-11-26 11:52:17,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 11:52:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-11-26 11:52:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 11:52:17,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:17,721 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:17,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-26 11:52:17,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:17,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:17,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1461750529, now seen corresponding path program 4 times [2023-11-26 11:52:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:17,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972665750] [2023-11-26 11:52:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:17,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-11-26 11:52:18,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:18,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972665750] [2023-11-26 11:52:18,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972665750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:18,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408883352] [2023-11-26 11:52:18,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:52:18,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:18,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:18,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:52:18,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:52:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:18,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:18,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 86 proven. 71 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-26 11:52:18,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 28 proven. 129 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-26 11:52:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408883352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:19,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-26 11:52:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856209235] [2023-11-26 11:52:19,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:52:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:52:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:52:19,144 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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 11:52:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:19,827 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2023-11-26 11:52:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:52:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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 71 [2023-11-26 11:52:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:19,828 INFO L225 Difference]: With dead ends: 240 [2023-11-26 11:52:19,828 INFO L226 Difference]: Without dead ends: 116 [2023-11-26 11:52:19,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:52:19,830 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:19,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 60 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:52:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-26 11:52:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2023-11-26 11:52:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 105 states have internal predecessors, (121), 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 11:52:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2023-11-26 11:52:19,868 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 71 [2023-11-26 11:52:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:19,868 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2023-11-26 11:52:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 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 11:52:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2023-11-26 11:52:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-26 11:52:19,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:19,870 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:19,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:20,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:52:20,077 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:20,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1787036673, now seen corresponding path program 5 times [2023-11-26 11:52:20,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:20,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718337263] [2023-11-26 11:52:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:20,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 18 proven. 270 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-26 11:52:20,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:20,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718337263] [2023-11-26 11:52:20,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718337263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:20,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072227532] [2023-11-26 11:52:20,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:52:20,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:20,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:20,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:52:22,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-26 11:52:22,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:22,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:52:22,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 426 proven. 84 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-11-26 11:52:23,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 408 proven. 102 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-11-26 11:52:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072227532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:23,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-26 11:52:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885126891] [2023-11-26 11:52:23,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:23,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:52:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:52:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:52:23,392 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 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 11:52:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:24,955 INFO L93 Difference]: Finished difference Result 445 states and 527 transitions. [2023-11-26 11:52:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:52:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 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 101 [2023-11-26 11:52:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:24,958 INFO L225 Difference]: With dead ends: 445 [2023-11-26 11:52:24,958 INFO L226 Difference]: Without dead ends: 269 [2023-11-26 11:52:24,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2023-11-26 11:52:24,960 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 153 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:24,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 50 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:52:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-26 11:52:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 193. [2023-11-26 11:52:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1041666666666667) internal successors, (212), 192 states have internal predecessors, (212), 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 11:52:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 212 transitions. [2023-11-26 11:52:25,017 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 212 transitions. Word has length 101 [2023-11-26 11:52:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:25,018 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 212 transitions. [2023-11-26 11:52:25,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 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 11:52:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 212 transitions. [2023-11-26 11:52:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-26 11:52:25,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:25,020 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:25,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:25,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:25,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:25,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1270388469, now seen corresponding path program 6 times [2023-11-26 11:52:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885140473] [2023-11-26 11:52:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 22 proven. 768 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2023-11-26 11:52:26,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:26,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885140473] [2023-11-26 11:52:26,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885140473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:26,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318159180] [2023-11-26 11:52:26,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:52:26,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:26,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:26,631 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:26,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:52:26,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-26 11:52:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:26,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:52:26,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 1623 proven. 0 refuted. 0 times theorem prover too weak. 1965 trivial. 0 not checked. [2023-11-26 11:52:27,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318159180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:27,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:27,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-11-26 11:52:27,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964944909] [2023-11-26 11:52:27,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:27,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:27,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:52:27,127 INFO L87 Difference]: Start difference. First operand 193 states and 212 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 11:52:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:27,255 INFO L93 Difference]: Finished difference Result 364 states and 396 transitions. [2023-11-26 11:52:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 188 [2023-11-26 11:52:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:27,260 INFO L225 Difference]: With dead ends: 364 [2023-11-26 11:52:27,260 INFO L226 Difference]: Without dead ends: 362 [2023-11-26 11:52:27,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:52:27,261 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:27,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-26 11:52:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 230. [2023-11-26 11:52:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1004366812227073) internal successors, (252), 229 states have internal predecessors, (252), 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 11:52:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 252 transitions. [2023-11-26 11:52:27,325 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 252 transitions. Word has length 188 [2023-11-26 11:52:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:27,327 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 252 transitions. [2023-11-26 11:52:27,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 11:52:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 252 transitions. [2023-11-26 11:52:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-11-26 11:52:27,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:27,332 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:27,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:27,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:52:27,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:27,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash -576649274, now seen corresponding path program 7 times [2023-11-26 11:52:27,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:27,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617983567] [2023-11-26 11:52:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2023-11-26 11:52:29,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:29,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617983567] [2023-11-26 11:52:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617983567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:29,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298483297] [2023-11-26 11:52:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:52:29,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:29,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:29,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:52:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:29,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:29,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 1622 proven. 116 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2023-11-26 11:52:29,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 1622 proven. 116 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2023-11-26 11:52:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298483297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:29,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-11-26 11:52:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307465421] [2023-11-26 11:52:29,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:29,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:52:29,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:52:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:52:29,954 INFO L87 Difference]: Start difference. First operand 230 states and 252 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 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 11:52:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:36,995 INFO L93 Difference]: Finished difference Result 1129 states and 1324 transitions. [2023-11-26 11:52:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-26 11:52:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 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 227 [2023-11-26 11:52:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:36,999 INFO L225 Difference]: With dead ends: 1129 [2023-11-26 11:52:37,000 INFO L226 Difference]: Without dead ends: 903 [2023-11-26 11:52:37,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1267, Invalid=6389, Unknown=0, NotChecked=0, Total=7656 [2023-11-26 11:52:37,009 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 399 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:37,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 67 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:52:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-11-26 11:52:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 799. [2023-11-26 11:52:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.0526315789473684) internal successors, (840), 798 states have internal predecessors, (840), 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 11:52:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 840 transitions. [2023-11-26 11:52:37,217 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 840 transitions. Word has length 227 [2023-11-26 11:52:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:37,218 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 840 transitions. [2023-11-26 11:52:37,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 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 11:52:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 840 transitions. [2023-11-26 11:52:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2023-11-26 11:52:37,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:37,242 INFO L195 NwaCegarLoop]: trace histogram [226, 225, 225, 30, 29, 29, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:52:37,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:37,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:37,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:37,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1105811065, now seen corresponding path program 8 times [2023-11-26 11:52:37,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:37,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659888281] [2023-11-26 11:52:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:37,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 45 proven. 6003 refuted. 0 times theorem prover too weak. 77977 trivial. 0 not checked. [2023-11-26 11:52:44,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659888281] [2023-11-26 11:52:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659888281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747138867] [2023-11-26 11:52:44,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:52:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:44,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:44,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_601d5869-186c-4c52-93ba-6c1efa32e785/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:52:44,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:52:44,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:44,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 11:52:44,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 20384 proven. 670 refuted. 0 times theorem prover too weak. 62971 trivial. 0 not checked. [2023-11-26 11:52:45,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 84025 backedges. 19972 proven. 1082 refuted. 0 times theorem prover too weak. 62971 trivial. 0 not checked. [2023-11-26 11:52:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747138867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:46,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:46,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 47 [2023-11-26 11:52:46,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385414538] [2023-11-26 11:52:46,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:46,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-26 11:52:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-26 11:52:46,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 11:52:46,386 INFO L87 Difference]: Start difference. First operand 799 states and 840 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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)