./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 350ac91600d4c4390de9f3fc82ef0416828210bb98ae007abf94c777e2c55126 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:24:45,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:24:45,263 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:24:45,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:24:45,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:24:45,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:24:45,320 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:24:45,321 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:24:45,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:24:45,328 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:24:45,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:24:45,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:24:45,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:24:45,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:24:45,333 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:24:45,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:24:45,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:24:45,335 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:24:45,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:24:45,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:24:45,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:24:45,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:24:45,337 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:24:45,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:24:45,338 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:24:45,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:24:45,339 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:24:45,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:24:45,340 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:24:45,341 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:24:45,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:24:45,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:24:45,343 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:24:45,343 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:24:45,343 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:24:45,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:24:45,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:24:45,344 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:24:45,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:24:45,344 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:24:45,345 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:24:45,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:24:45,345 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_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 350ac91600d4c4390de9f3fc82ef0416828210bb98ae007abf94c777e2c55126 [2023-11-23 22:24:45,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:24:45,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:24:45,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:24:45,654 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:24:45,654 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:24:45,656 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/eca-rers2012/Problem14_label14.c [2023-11-23 22:24:49,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:24:49,391 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:24:49,392 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/sv-benchmarks/c/eca-rers2012/Problem14_label14.c [2023-11-23 22:24:49,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/data/5c2ee32ef/814a6c3aff314e32b2c0034f6ed9d69a/FLAGb15299f9a [2023-11-23 22:24:49,424 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/data/5c2ee32ef/814a6c3aff314e32b2c0034f6ed9d69a [2023-11-23 22:24:49,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:24:49,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:24:49,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:24:49,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:24:49,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:24:49,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:24:49" (1/1) ... [2023-11-23 22:24:49,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23339319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:49, skipping insertion in model container [2023-11-23 22:24:49,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:24:49" (1/1) ... [2023-11-23 22:24:49,513 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:24:49,708 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_bd3c236e-6451-4f15-aa83-4612903ead44/sv-benchmarks/c/eca-rers2012/Problem14_label14.c[2862,2875] [2023-11-23 22:24:50,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:24:50,030 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:24:50,065 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_bd3c236e-6451-4f15-aa83-4612903ead44/sv-benchmarks/c/eca-rers2012/Problem14_label14.c[2862,2875] [2023-11-23 22:24:50,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:24:50,222 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:24:50,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50 WrapperNode [2023-11-23 22:24:50,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:24:50,224 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:24:50,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:24:50,225 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:24:50,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,433 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-23 22:24:50,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:24:50,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:24:50,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:24:50,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:24:50,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,479 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,527 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:24:50,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,580 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:24:50,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:24:50,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:24:50,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:24:50,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (1/1) ... [2023-11-23 22:24:50,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:24:50,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:24:50,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:24:50,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:24:50,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:24:50,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:24:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:24:50,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:24:50,766 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:24:50,768 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:24:52,226 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:24:52,302 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:24:52,304 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:24:52,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:24:52 BoogieIcfgContainer [2023-11-23 22:24:52,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:24:52,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:24:52,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:24:52,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:24:52,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:24:49" (1/3) ... [2023-11-23 22:24:52,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ab03b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:24:52, skipping insertion in model container [2023-11-23 22:24:52,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:50" (2/3) ... [2023-11-23 22:24:52,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ab03b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:24:52, skipping insertion in model container [2023-11-23 22:24:52,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:24:52" (3/3) ... [2023-11-23 22:24:52,316 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2023-11-23 22:24:52,338 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:24:52,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:24:52,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:24:52,423 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;@7b5d5e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:24:52,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:24:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:24:52,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:24:52,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:52,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:24:52,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -341467354, now seen corresponding path program 1 times [2023-11-23 22:24:52,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:52,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014888765] [2023-11-23 22:24:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:24:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014888765] [2023-11-23 22:24:52,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014888765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:52,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:52,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:24:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857054902] [2023-11-23 22:24:52,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:52,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:24:52,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:24:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:24:52,800 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:24:52,866 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-23 22:24:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:24:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 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 25 [2023-11-23 22:24:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:24:52,880 INFO L225 Difference]: With dead ends: 365 [2023-11-23 22:24:52,880 INFO L226 Difference]: Without dead ends: 181 [2023-11-23 22:24:52,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:24:52,888 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:24:52,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:24:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-23 22:24:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-23 22:24:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-23 22:24:52,943 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 25 [2023-11-23 22:24:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:24:52,943 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-23 22:24:52,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-23 22:24:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 22:24:52,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:24:52,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:52,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:24:52,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:24:52,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1634153585, now seen corresponding path program 1 times [2023-11-23 22:24:52,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:52,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394568025] [2023-11-23 22:24:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:52,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:24:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394568025] [2023-11-23 22:24:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394568025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:53,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:24:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341010656] [2023-11-23 22:24:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:53,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:24:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:24:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:24:53,123 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:24:54,036 INFO L93 Difference]: Finished difference Result 361 states and 589 transitions. [2023-11-23 22:24:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:24:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 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 25 [2023-11-23 22:24:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:24:54,041 INFO L225 Difference]: With dead ends: 361 [2023-11-23 22:24:54,041 INFO L226 Difference]: Without dead ends: 359 [2023-11-23 22:24:54,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:24:54,043 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 176 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:24:54,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 10 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 22:24:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-23 22:24:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-23 22:24:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.6396648044692737) internal successors, (587), 358 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 587 transitions. [2023-11-23 22:24:54,105 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 587 transitions. Word has length 25 [2023-11-23 22:24:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:24:54,106 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 587 transitions. [2023-11-23 22:24:54,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 587 transitions. [2023-11-23 22:24:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-23 22:24:54,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:24:54,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:54,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:24:54,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:24:54,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1603307109, now seen corresponding path program 1 times [2023-11-23 22:24:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:54,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481497627] [2023-11-23 22:24:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:24:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481497627] [2023-11-23 22:24:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481497627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:54,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:54,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:24:54,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294800758] [2023-11-23 22:24:54,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:54,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:24:54,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:24:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:24:54,490 INFO L87 Difference]: Start difference. First operand 359 states and 587 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:24:55,331 INFO L93 Difference]: Finished difference Result 1073 states and 1758 transitions. [2023-11-23 22:24:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:24:55,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-23 22:24:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:24:55,337 INFO L225 Difference]: With dead ends: 1073 [2023-11-23 22:24:55,338 INFO L226 Difference]: Without dead ends: 715 [2023-11-23 22:24:55,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:24:55,347 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:24:55,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 87 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 22:24:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-23 22:24:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 537. [2023-11-23 22:24:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4944029850746268) internal successors, (801), 536 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 801 transitions. [2023-11-23 22:24:55,376 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 801 transitions. Word has length 90 [2023-11-23 22:24:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:24:55,377 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 801 transitions. [2023-11-23 22:24:55,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 801 transitions. [2023-11-23 22:24:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 22:24:55,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:24:55,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:55,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:24:55,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:24:55,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash 920904056, now seen corresponding path program 1 times [2023-11-23 22:24:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:55,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999321659] [2023-11-23 22:24:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:24:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999321659] [2023-11-23 22:24:55,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999321659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:55,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:55,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503334824] [2023-11-23 22:24:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:55,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:55,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:55,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:55,767 INFO L87 Difference]: Start difference. First operand 537 states and 801 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:24:56,915 INFO L93 Difference]: Finished difference Result 1429 states and 2029 transitions. [2023-11-23 22:24:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:24:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-23 22:24:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:24:56,922 INFO L225 Difference]: With dead ends: 1429 [2023-11-23 22:24:56,922 INFO L226 Difference]: Without dead ends: 893 [2023-11-23 22:24:56,925 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 [2023-11-23 22:24:56,932 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 418 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:24:56,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 119 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 22:24:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-11-23 22:24:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2023-11-23 22:24:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3374439461883407) internal successors, (1193), 892 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1193 transitions. [2023-11-23 22:24:56,980 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1193 transitions. Word has length 104 [2023-11-23 22:24:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:24:56,982 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1193 transitions. [2023-11-23 22:24:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1193 transitions. [2023-11-23 22:24:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-23 22:24:56,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:24:56,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:24:56,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:24:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1054143948, now seen corresponding path program 1 times [2023-11-23 22:24:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261709131] [2023-11-23 22:24:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:24:57,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:57,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261709131] [2023-11-23 22:24:57,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261709131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:57,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:24:57,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:24:57,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865995376] [2023-11-23 22:24:57,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:24:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:24:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:57,370 INFO L87 Difference]: Start difference. First operand 893 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:24:58,316 INFO L93 Difference]: Finished difference Result 1992 states and 2628 transitions. [2023-11-23 22:24:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:24:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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 184 [2023-11-23 22:24:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:24:58,324 INFO L225 Difference]: With dead ends: 1992 [2023-11-23 22:24:58,324 INFO L226 Difference]: Without dead ends: 1071 [2023-11-23 22:24:58,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:24:58,327 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:24:58,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 116 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 22:24:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2023-11-23 22:24:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1071. [2023-11-23 22:24:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.1803738317757009) internal successors, (1263), 1070 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1263 transitions. [2023-11-23 22:24:58,364 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1263 transitions. Word has length 184 [2023-11-23 22:24:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:24:58,365 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1263 transitions. [2023-11-23 22:24:58,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1263 transitions. [2023-11-23 22:24:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-23 22:24:58,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:24:58,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:24:58,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:24:58,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:24:58,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:24:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -669034714, now seen corresponding path program 1 times [2023-11-23 22:24:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:24:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632938182] [2023-11-23 22:24:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:58,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:24:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 47 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:24:58,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:24:58,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632938182] [2023-11-23 22:24:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632938182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:24:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620087054] [2023-11-23 22:24:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:24:58,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:24:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:24:58,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:24:58,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:24:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:24:58,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:24:58,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:24:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 22:24:59,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:24:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620087054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:24:59,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:24:59,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 22:24:59,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34446457] [2023-11-23 22:24:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:24:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:24:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:24:59,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:24:59,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:24:59,295 INFO L87 Difference]: Start difference. First operand 1071 states and 1263 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:24:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:24:59,970 INFO L93 Difference]: Finished difference Result 2319 states and 2778 transitions. [2023-11-23 22:24:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:24:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 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 196 [2023-11-23 22:24:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:24:59,990 INFO L225 Difference]: With dead ends: 2319 [2023-11-23 22:24:59,990 INFO L226 Difference]: Without dead ends: 1249 [2023-11-23 22:24:59,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:24:59,996 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:24:59,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:24:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-23 22:25:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1071. [2023-11-23 22:25:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.1672897196261682) internal successors, (1249), 1070 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1249 transitions. [2023-11-23 22:25:00,027 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1249 transitions. Word has length 196 [2023-11-23 22:25:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:00,030 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1249 transitions. [2023-11-23 22:25:00,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1249 transitions. [2023-11-23 22:25:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-23 22:25:00,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:00,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:00,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:00,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:00,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 864639209, now seen corresponding path program 1 times [2023-11-23 22:25:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:00,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258035831] [2023-11-23 22:25:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:00,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:25:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258035831] [2023-11-23 22:25:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258035831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:00,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:00,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485245136] [2023-11-23 22:25:00,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:00,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:00,590 INFO L87 Difference]: Start difference. First operand 1071 states and 1249 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:01,315 INFO L93 Difference]: Finished difference Result 2853 states and 3361 transitions. [2023-11-23 22:25:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 199 [2023-11-23 22:25:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:01,327 INFO L225 Difference]: With dead ends: 2853 [2023-11-23 22:25:01,327 INFO L226 Difference]: Without dead ends: 1783 [2023-11-23 22:25:01,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:01,330 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:01,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 75 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:25:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2023-11-23 22:25:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1605. [2023-11-23 22:25:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 1.1365336658354115) internal successors, (1823), 1604 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1823 transitions. [2023-11-23 22:25:01,377 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 1823 transitions. Word has length 199 [2023-11-23 22:25:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:01,378 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 1823 transitions. [2023-11-23 22:25:01,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 1823 transitions. [2023-11-23 22:25:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-23 22:25:01,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:01,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:25:01,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:01,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1781502392, now seen corresponding path program 1 times [2023-11-23 22:25:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636142306] [2023-11-23 22:25:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-23 22:25:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:01,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636142306] [2023-11-23 22:25:01,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636142306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:01,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:01,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374815271] [2023-11-23 22:25:01,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:01,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:01,757 INFO L87 Difference]: Start difference. First operand 1605 states and 1823 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:02,493 INFO L93 Difference]: Finished difference Result 3565 states and 4150 transitions. [2023-11-23 22:25:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:02,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 316 [2023-11-23 22:25:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:02,507 INFO L225 Difference]: With dead ends: 3565 [2023-11-23 22:25:02,507 INFO L226 Difference]: Without dead ends: 2139 [2023-11-23 22:25:02,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:02,511 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 161 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:02,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 65 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:25:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-23 22:25:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1783. [2023-11-23 22:25:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.1402918069584735) internal successors, (2032), 1782 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2032 transitions. [2023-11-23 22:25:02,560 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2032 transitions. Word has length 316 [2023-11-23 22:25:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:02,562 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2032 transitions. [2023-11-23 22:25:02,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2032 transitions. [2023-11-23 22:25:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-11-23 22:25:02,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:02,570 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:02,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:25:02,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:02,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1991005137, now seen corresponding path program 1 times [2023-11-23 22:25:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242103930] [2023-11-23 22:25:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:02,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-23 22:25:03,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242103930] [2023-11-23 22:25:03,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242103930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:03,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:03,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:03,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684761323] [2023-11-23 22:25:03,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:25:03,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:25:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:25:03,158 INFO L87 Difference]: Start difference. First operand 1783 states and 2032 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:03,973 INFO L93 Difference]: Finished difference Result 3594 states and 4115 transitions. [2023-11-23 22:25:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:25:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 395 [2023-11-23 22:25:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:03,985 INFO L225 Difference]: With dead ends: 3594 [2023-11-23 22:25:03,985 INFO L226 Difference]: Without dead ends: 1961 [2023-11-23 22:25:03,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:25:03,988 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 141 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:03,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 14 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 22:25:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-23 22:25:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1783. [2023-11-23 22:25:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0897867564534232) internal successors, (1942), 1782 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1942 transitions. [2023-11-23 22:25:04,042 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1942 transitions. Word has length 395 [2023-11-23 22:25:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:04,042 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1942 transitions. [2023-11-23 22:25:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1942 transitions. [2023-11-23 22:25:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2023-11-23 22:25:04,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:04,051 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:04,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:25:04,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:04,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -171774278, now seen corresponding path program 1 times [2023-11-23 22:25:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435288225] [2023-11-23 22:25:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-23 22:25:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:04,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435288225] [2023-11-23 22:25:04,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435288225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:04,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:04,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:04,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279463229] [2023-11-23 22:25:04,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:04,599 INFO L87 Difference]: Start difference. First operand 1783 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:05,298 INFO L93 Difference]: Finished difference Result 4099 states and 4526 transitions. [2023-11-23 22:25:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 418 [2023-11-23 22:25:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:05,313 INFO L225 Difference]: With dead ends: 4099 [2023-11-23 22:25:05,313 INFO L226 Difference]: Without dead ends: 2495 [2023-11-23 22:25:05,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:05,316 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 113 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:05,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 199 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:25:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-23 22:25:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2495. [2023-11-23 22:25:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.0922213311948676) internal successors, (2724), 2494 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2724 transitions. [2023-11-23 22:25:05,384 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2724 transitions. Word has length 418 [2023-11-23 22:25:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:05,385 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 2724 transitions. [2023-11-23 22:25:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2724 transitions. [2023-11-23 22:25:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-23 22:25:05,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:05,395 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:05,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:25:05,396 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:05,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash -940535353, now seen corresponding path program 1 times [2023-11-23 22:25:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:05,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831121595] [2023-11-23 22:25:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:05,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-23 22:25:05,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831121595] [2023-11-23 22:25:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831121595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:05,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:05,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:05,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841172346] [2023-11-23 22:25:05,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:05,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:05,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:05,802 INFO L87 Difference]: Start difference. First operand 2495 states and 2724 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:06,478 INFO L93 Difference]: Finished difference Result 6057 states and 6692 transitions. [2023-11-23 22:25:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:06,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 459 [2023-11-23 22:25:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:06,500 INFO L225 Difference]: With dead ends: 6057 [2023-11-23 22:25:06,500 INFO L226 Difference]: Without dead ends: 3741 [2023-11-23 22:25:06,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:06,505 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:06,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 50 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:25:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2023-11-23 22:25:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3385. [2023-11-23 22:25:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 1.0851063829787233) internal successors, (3672), 3384 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 3672 transitions. [2023-11-23 22:25:06,608 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 3672 transitions. Word has length 459 [2023-11-23 22:25:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:06,609 INFO L495 AbstractCegarLoop]: Abstraction has 3385 states and 3672 transitions. [2023-11-23 22:25:06,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 3672 transitions. [2023-11-23 22:25:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-23 22:25:06,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:06,628 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:06,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:25:06,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:06,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -476572367, now seen corresponding path program 1 times [2023-11-23 22:25:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147977959] [2023-11-23 22:25:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 989 proven. 104 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-11-23 22:25:07,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147977959] [2023-11-23 22:25:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147977959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345973232] [2023-11-23 22:25:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:07,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:07,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:07,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:25:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:08,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 22:25:08,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2023-11-23 22:25:08,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:25:08,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345973232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:08,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:25:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-23 22:25:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66372017] [2023-11-23 22:25:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:08,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:25:08,149 INFO L87 Difference]: Start difference. First operand 3385 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:08,775 INFO L93 Difference]: Finished difference Result 4277 states and 4631 transitions. [2023-11-23 22:25:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:08,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 604 [2023-11-23 22:25:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:08,802 INFO L225 Difference]: With dead ends: 4277 [2023-11-23 22:25:08,802 INFO L226 Difference]: Without dead ends: 4275 [2023-11-23 22:25:08,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:25:08,805 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 175 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:08,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 9 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:25:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-23 22:25:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3385. [2023-11-23 22:25:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 1.0851063829787233) internal successors, (3672), 3384 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 3672 transitions. [2023-11-23 22:25:08,954 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 3672 transitions. Word has length 604 [2023-11-23 22:25:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:08,955 INFO L495 AbstractCegarLoop]: Abstraction has 3385 states and 3672 transitions. [2023-11-23 22:25:08,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 3672 transitions. [2023-11-23 22:25:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-23 22:25:08,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:08,976 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:08,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:25:09,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:09,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:09,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1588310884, now seen corresponding path program 1 times [2023-11-23 22:25:09,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352631740] [2023-11-23 22:25:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:09,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-23 22:25:09,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352631740] [2023-11-23 22:25:09,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352631740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835856422] [2023-11-23 22:25:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:09,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:09,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:09,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:09,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:25:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:10,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:25:10,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-23 22:25:10,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 762 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-23 22:25:10,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835856422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:25:10,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:25:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-23 22:25:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155339793] [2023-11-23 22:25:10,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:25:10,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:25:10,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:25:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:25:10,877 INFO L87 Difference]: Start difference. First operand 3385 states and 3672 transitions. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:12,282 INFO L93 Difference]: Finished difference Result 8193 states and 8939 transitions. [2023-11-23 22:25:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:25:12,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 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 614 [2023-11-23 22:25:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:12,309 INFO L225 Difference]: With dead ends: 8193 [2023-11-23 22:25:12,310 INFO L226 Difference]: Without dead ends: 4987 [2023-11-23 22:25:12,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1226 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:25:12,315 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 168 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:12,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 61 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 22:25:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2023-11-23 22:25:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4097. [2023-11-23 22:25:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 1.083740234375) internal successors, (4439), 4096 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 4439 transitions. [2023-11-23 22:25:12,434 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 4439 transitions. Word has length 614 [2023-11-23 22:25:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:12,435 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 4439 transitions. [2023-11-23 22:25:12,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 4439 transitions. [2023-11-23 22:25:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-23 22:25:12,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:12,443 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:12,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:12,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:12,660 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:12,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1077471108, now seen corresponding path program 1 times [2023-11-23 22:25:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814241035] [2023-11-23 22:25:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 1016 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-11-23 22:25:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814241035] [2023-11-23 22:25:13,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814241035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:13,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:13,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:13,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95637397] [2023-11-23 22:25:13,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:13,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:13,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:13,480 INFO L87 Difference]: Start difference. First operand 4097 states and 4439 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:14,162 INFO L93 Difference]: Finished difference Result 8193 states and 8892 transitions. [2023-11-23 22:25:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 624 [2023-11-23 22:25:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:14,195 INFO L225 Difference]: With dead ends: 8193 [2023-11-23 22:25:14,201 INFO L226 Difference]: Without dead ends: 4275 [2023-11-23 22:25:14,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:14,207 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:14,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 240 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:25:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-23 22:25:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3919. [2023-11-23 22:25:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.0811638591117918) internal successors, (4236), 3918 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 4236 transitions. [2023-11-23 22:25:14,325 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 4236 transitions. Word has length 624 [2023-11-23 22:25:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:14,326 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 4236 transitions. [2023-11-23 22:25:14,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 4236 transitions. [2023-11-23 22:25:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2023-11-23 22:25:14,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:14,334 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:25:14,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:14,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1692515108, now seen corresponding path program 1 times [2023-11-23 22:25:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:14,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719548895] [2023-11-23 22:25:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 908 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2023-11-23 22:25:14,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:14,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719548895] [2023-11-23 22:25:14,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719548895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:14,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537469175] [2023-11-23 22:25:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:14,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:14,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:14,863 INFO L87 Difference]: Start difference. First operand 3919 states and 4236 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:15,490 INFO L93 Difference]: Finished difference Result 9439 states and 10272 transitions. [2023-11-23 22:25:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 686 [2023-11-23 22:25:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:15,503 INFO L225 Difference]: With dead ends: 9439 [2023-11-23 22:25:15,504 INFO L226 Difference]: Without dead ends: 5699 [2023-11-23 22:25:15,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:15,510 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 109 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:15,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 35 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:25:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2023-11-23 22:25:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5343. [2023-11-23 22:25:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 1.0818045675776862) internal successors, (5779), 5342 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 5779 transitions. [2023-11-23 22:25:15,620 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 5779 transitions. Word has length 686 [2023-11-23 22:25:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:15,621 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 5779 transitions. [2023-11-23 22:25:15,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 5779 transitions. [2023-11-23 22:25:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2023-11-23 22:25:15,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:15,629 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 22:25:15,630 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:15,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -778746249, now seen corresponding path program 1 times [2023-11-23 22:25:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363424568] [2023-11-23 22:25:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1042 proven. 93 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2023-11-23 22:25:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363424568] [2023-11-23 22:25:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363424568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591041103] [2023-11-23 22:25:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:16,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:16,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:16,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:16,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:25:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:16,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:25:16,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1135 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2023-11-23 22:25:17,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:25:17,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591041103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:17,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:25:17,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-23 22:25:17,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119533810] [2023-11-23 22:25:17,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:17,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:17,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:25:17,507 INFO L87 Difference]: Start difference. First operand 5343 states and 5779 transitions. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:18,130 INFO L93 Difference]: Finished difference Result 11219 states and 12111 transitions. [2023-11-23 22:25:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 704 [2023-11-23 22:25:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:18,145 INFO L225 Difference]: With dead ends: 11219 [2023-11-23 22:25:18,145 INFO L226 Difference]: Without dead ends: 6055 [2023-11-23 22:25:18,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:25:18,152 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:18,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 22:25:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2023-11-23 22:25:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 5343. [2023-11-23 22:25:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 1.0818045675776862) internal successors, (5779), 5342 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 5779 transitions. [2023-11-23 22:25:18,272 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 5779 transitions. Word has length 704 [2023-11-23 22:25:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:18,273 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 5779 transitions. [2023-11-23 22:25:18,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 5779 transitions. [2023-11-23 22:25:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-11-23 22:25:18,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:18,282 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:18,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:25:18,504 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:18,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1578204844, now seen corresponding path program 1 times [2023-11-23 22:25:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626225848] [2023-11-23 22:25:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2023-11-23 22:25:19,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:19,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626225848] [2023-11-23 22:25:19,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626225848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:25:19,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:25:19,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:25:19,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980467848] [2023-11-23 22:25:19,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:19,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:25:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:25:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:19,709 INFO L87 Difference]: Start difference. First operand 5343 states and 5779 transitions. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:20,287 INFO L93 Difference]: Finished difference Result 10863 states and 11774 transitions. [2023-11-23 22:25:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:25:20,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 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 731 [2023-11-23 22:25:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:20,299 INFO L225 Difference]: With dead ends: 10863 [2023-11-23 22:25:20,299 INFO L226 Difference]: Without dead ends: 5699 [2023-11-23 22:25:20,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:25:20,305 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:20,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 224 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:25:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2023-11-23 22:25:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5699. [2023-11-23 22:25:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 5698 states have (on average 1.073885573885574) internal successors, (6119), 5698 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 6119 transitions. [2023-11-23 22:25:20,408 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 6119 transitions. Word has length 731 [2023-11-23 22:25:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:20,409 INFO L495 AbstractCegarLoop]: Abstraction has 5699 states and 6119 transitions. [2023-11-23 22:25:20,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 6119 transitions. [2023-11-23 22:25:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2023-11-23 22:25:20,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:20,418 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:20,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 22:25:20,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:20,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1398546839, now seen corresponding path program 1 times [2023-11-23 22:25:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:20,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349056105] [2023-11-23 22:25:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:20,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 1033 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2023-11-23 22:25:22,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349056105] [2023-11-23 22:25:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349056105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130610077] [2023-11-23 22:25:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:22,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:22,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:22,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:25:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:22,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:25:22,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 1207 proven. 451 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-11-23 22:25:23,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 1105 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2023-11-23 22:25:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130610077] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:24,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:25:24,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 10 [2023-11-23 22:25:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402256608] [2023-11-23 22:25:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:24,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:25:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:25:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:25:24,670 INFO L87 Difference]: Start difference. First operand 5699 states and 6119 transitions. Second operand has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:25:25,465 INFO L93 Difference]: Finished difference Result 11575 states and 12460 transitions. [2023-11-23 22:25:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:25:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 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 781 [2023-11-23 22:25:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:25:25,479 INFO L225 Difference]: With dead ends: 11575 [2023-11-23 22:25:25,479 INFO L226 Difference]: Without dead ends: 6055 [2023-11-23 22:25:25,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1565 GetRequests, 1556 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:25:25,486 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 318 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:25:25,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 8 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:25:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2023-11-23 22:25:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 6055. [2023-11-23 22:25:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 1.0753221010901883) internal successors, (6510), 6054 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 6510 transitions. [2023-11-23 22:25:25,635 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 6510 transitions. Word has length 781 [2023-11-23 22:25:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:25:25,637 INFO L495 AbstractCegarLoop]: Abstraction has 6055 states and 6510 transitions. [2023-11-23 22:25:25,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.0) internal successors, (385), 5 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:25:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 6510 transitions. [2023-11-23 22:25:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2023-11-23 22:25:25,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:25:25,652 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:25:25,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:25:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:25:25,866 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:25:25,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:25:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 258723057, now seen corresponding path program 1 times [2023-11-23 22:25:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:25:25,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414847832] [2023-11-23 22:25:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:25,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:25:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 1069 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2023-11-23 22:25:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:25:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414847832] [2023-11-23 22:25:27,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414847832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:27,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696979533] [2023-11-23 22:25:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:25:27,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:25:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:25:27,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:25:27,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd3c236e-6451-4f15-aa83-4612903ead44/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:25:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:25:27,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:25:27,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:25:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 1210 proven. 484 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-11-23 22:25:28,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:25:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 1141 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2023-11-23 22:25:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696979533] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:25:29,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:25:29,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 10 [2023-11-23 22:25:29,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255136205] [2023-11-23 22:25:29,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:25:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:25:29,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:25:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:25:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:25:29,633 INFO L87 Difference]: Start difference. First operand 6055 states and 6510 transitions. Second operand has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 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)